CMM7686GX300-3V

CMM7686GX300-3V cpuModule

TM

User’s Manual

RTD Enhanced Award BIOS Versions 4.51.xx

(Real Time Devices)

I I S O 9 0 0 1 a n d A S 9 1 0 0 C e r t i f f i e d

BDM-610000003

Rev. A

CMM7686GX300-3V cpuModule

TM

User’s Manual

RTD Embedded Technologies, INC.

103 Innovation Blvd.

State College, PA 16803-0906

Phone: +1-814-234-8087

FAX: +1-814-234-5218

E-mail [email protected]

[email protected]

web site http://www.rtd.com

Revision History

Rev. A) New manual naming method

Published by:

RTD Embedded Technologies, Inc.


State College, PA 16803-0906

Copyright 1999, 2002, 2003 by RTD Embedded Technologies, Inc.

All rights reserved

Printed in U.S.A.

The RTD Logo is a registered trademark of RTD Embedded Technologies. cpuModule and utilityModule are trademarks of RTD Embedded Technologies. PhoenixPICO and PheonixPICO BIOS are trademarks of

Phoenix Technologies Ltd. PS/2, PC/XT, PC/AT and IBM are trademarks of International Business Machines Inc. MS-DOS, Windows, Windows 95, Windows 98 and Windows NT are trademarks of Microsoft

Corp. PC/104 is a registered trademark of PC/104 Consortium. All other trademarks appearing in this document are the property of their respective owners.

Chapter 1: Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

The CMM7686GX300-3V cpuModule ............................................8

Specifications ....................................................................................9

Chapter 2: Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Basic Connector Locations ...............................................................14

Fail safe boot rom .............................................................................16

Cable Kits .........................................................................................17

Connecting Power .............................................................................18

Connecting the utility cable ..............................................................19

Connecting a Keyboard ....................................................................20

Connecting to the PC/104 Bus ..........................................................21

Connecting to the PC/104-Plus PCI Bus ..........................................22

Default Configuration .......................................................................26

Booting to Boot Block Flash with Fail Safe Boot ROM ..................28

If You Misconfigure the cpuModule ................................................30

For More Information .......................................................................31

Chapter 3: Connecting the cpuModule . . . . . . . . . . . . . . . . . . . . . . 33

I/O Connections ................................................................................34

Connector Locations .........................................................................35

Auxiliary Power, CN3 ......................................................................37

Serial Port 1, CN7 .............................................................................40

Serial Port 2, CN8 .............................................................................43

Parallel Port, CN6 .............................................................................46

Multifunction Connector, CN5 .........................................................49

VGA Video Connector, CN12 ..........................................................51

Bus Mouse Connector, CN4 .............................................................53

PC/104 Bus, CN1 and CN2 ..............................................................54

PC/104-Plus PCI Bus, CN16 ............................................................59

Chapter 4: Configuring the cpuModule(BIOS Setup) . . . . . . . . . . 63

Entering the BIOS Setup ...................................................................64


Disabling Fail Safe Boot Rom ..........................................................67

Installing SSD Memory ....................................................................68

Quick Boot Description ....................................................................69

Configuring with the RTD Enhanced Award BIOS .........................70

Chapter 5: Using the cpuModule . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Memory Map ....................................................................................86

Input/Output Address Map ...............................................................87

Hardware Interrupts ..........................................................................89

The RTD Enhanced Award BIOS ....................................................90

Power On Self Tests (POSTs) ..........................................................91

RTD Enhanced Award BIOS POST Codes ......................................93


Direct Hardware Control ..................................................................100

Watchdog Timer Control ..................................................................101

Real Time Clock Control ..................................................................102

Parallel Port Control .........................................................................103

Processor Clock Control ...................................................................104

Storing Applications On-board .........................................................105

Ways to Use the Solid State Disk Socket .........................................106

Using BIOS Extension Devices ........................................................108

Using Conventional Solid State Devices ..........................................109

Chapter 6: Hardware Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Jumpers .............................................................................................114

Jumpers and Default Jumper Settings ...............................................116

Solder Jumpers ..................................................................................117

Mechanical Dimensions ....................................................................118

686GX Processor Thermal Management .........................................119

Chapter 7: Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Common Problems and Solutions .....................................................122

Troubleshooting a PC/104 System ...................................................125

How to Obtain Technical Support ....................................................126

How to Return a Product ..................................................................127

Chapter 8: Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

C

HAPTER

1: I

NTRODUCTION

Chapter 1:

Chapter 2:

Chapter 3:

Chapter 4:

Chapter 5:

Chapter 6:

Chapter 7:

Chapter 8:

This manual is meant for users developing with the

CMM7686GX300-3V cpuModule. It contains information on hardware and software of the cpuModule.

READ THE SPECIFICA-

TIONS FIRST.

The manual is organized as follows:

Introduction

Introduces main features and specifications.

Getting Started

Provides abbreviated instructions to get started.

Connecting the cpuModule

Provides information on connecting the cpuModule to peripherals.

Configuring the cpuModule

Provides information on configuring hardware and software.

Using the cpuModule

Provides information needed to develop applications for the cpuModule.

The chapter includes general information on the cpuModule, plus detailed information on storing applications and system functions, and using utility programs.

Hardware Reference

Lists jumpers and their locations and mechanical dimensions.

Troubleshooting

Offers advice on debugging problems with your system.

Warranty

CMM7686GX300-3V

The CMM7686GX300-3V cpuModule

The PC/104 cpuModules described in this manual are designed for industrial applications which require:

• software and hardware compatibility with the PC/AT world

• high-speed "number-crunching" operation

• low power consumption

• small physical dimensions

• high reliability

• good noise immunity

This cpuModule is highly integrated, combining all major functions of a PC/AT computer on one compact board. It integrates all primary I/O functions of a AT compatible computer:

• SVGA controller

• a keyboard interface

• an ECP/EPP parallel port

• two versatile RS232/422/485 serial ports

• a Real Time Clock

• a speaker port

• a PS/2 mouse port

It also enhances standard AT-compatible computer systems by adding:

• one Solid State Disk socket

• a non-volatile configuration without a battery

• a Watchdog Timer

• Fail Safe Boot ROM

The next figure shows a simplified block diagram of the cpuModule:

You can easily customize the cpuModule by stacking PC/104 modules such as modems, LAN controllers, or analog and digital data acquisition modules. Stacking PC/104 modules on the cpuModule avoids expensive installations of backplanes and card cages and preserves the module's compactness.

RTD Enhanced Award BIOS is also implemented in the cpuModule. This BIOS supports ROM-

DOS™, MS-DOS and Windows operating systems. Drivers in the BIOS allow booting from floppy disk, hard disk, Solid State Disk,, boot block flash, or DiskOnChip®, thus enabling the system to be used with traditional disk drives or non-mechanical drives.

The cpuModule and BIOS are also compatible with most real-time operating systems for PC compatible computers, although these may require creation of custom drivers to use the SSD and watchdog timer.

8

CMM7686GX300-3V

Specifications

CMM7686GX300-3V

• National Semiconductor Geode GX1 MMX enhanced microprocessor

• 300 MHz clock speed

• 2.0 V processor supply (provided on-board)

• 16 KB L1 cache

• Math coprocessor

Video Controller

SVGA monitor output supports:

• 640 x 480 with 256 colors and 60, 72, 75, 85 Hz refresh






• 1280 x 1024 with 256 colors and 60, 75, 85 Hz refresh

• 1280 x 1024 with 65536 colors and 60, 75, 85 Hz refresh

DMA, Interrupts, Timers

• Six (6) DMA channels (8237 compatible)

• Fifteen (15) interrupt channels (8259 compatible)

• Three (3) counter/timers (8254 compatible)

Memory Configurations

• 32MB

• 128MB

Fail-safe Boot ROM

• Surface mount Flash chip that holds ROM-DOS

™

• Replaces the previous DiskOnChip®

CMM7686GX300-3V

9

Solid State Disk Socket

• SSD sockets can hold one of the following Conventional SSD devices.

Device

Atmel 5V Flash

SRAM

NOVRAM

EPROM

AMD 5V Flash

Full Read/Write

Access

yes yes yes

Read Only

Read Only

128Kbytes

yes yes yes yes yes

256Kbytes 512Kbytes

yes no no yes no yes yes yes yes yes

1Mbyte

no no no yes no

Device

DiskOnChip®

2000

DiskOnChip®

1000

MCSI PromDisk

Full Read/Write

Access

yes

Maximum Number per cpuModule

1

Sizes

16MB - 1GB * yes yes

1

1

1MB, 2MB

4MB, 8MB *

(*) Larger devices may be available in the future.

Peripherals

• Two serial ports software configurable for RS232/422/485; baud rates from 50 to 115200 baud in 16450 and 16550A compatible mode and 1.5 Mbaud in Extended UART mode

• Parallel port with SPP, ECP, EPP capability and selectable interrupts and DMA channel

• PC/AT standard keyboard port

• A PS/2 mouse port

• PC speaker port

• Real Time Clock (requires user-supplied external battery for date and time backup)

• Watchdog Timer with time-out of 1.2 seconds

BIOS

• RTD Enhanced Award BIOS

• Directly supports Solid State Disk (SSD) and M-Systems’ DiskOnChip®

• User-configurable using built-in Setup program

• Nonvolatile configuration without a battery

• Can boot from floppy disk, hard disk, Solid State Disk, or fail-safe boot rom

10

CMM7686GX300-3V

Connections

• AT bus, per PC/104 specifications (64-pin CN1, 40-pin CN2)

• Auxiliary Power Connector (12-pin CN3)

• PS/2 Mouse Connector (4-pin CN4)

• Multifunction connector (10-pin CN5)

• Parallel port connector (26-pin CN6)

• Serial port 1 connector (10-pin CN7)

• Serial port 2 connector (10-pin CN8)

• SVGA Monitor connector (10-pin CN12)

• PCI bus, per PC/104-Plus specifications (120-pin CN16)

Physical Characteristics

• Dimensions: x 3.775 x 0.6 inches (108.0 x 95.9 x 16mm)

• Weight (mass): 3.5 ounces (100 grams)

• PCB: 12-layer, mixed surface-mount and thru-hole

Operating environment

• Power supply: 5V +/- 5%, 10 Watts

• 686 processor operating temperature: 0 to +70 degrees C case (with proper cooling) See

686GX Processor Thermal Management

• Operating relative humidity: 0 to 95%, non-condensing

• Storage temperature :0 to +70 degrees C.

Power Consumption

Exact power consumption depends on the peripherals connected to the board, the selected SSD configuration and the memory configuration.

The table below lists power consumption for typical configurations and clock speeds:

CMM7686GX300-

3V

300 MHz

6.3 W 32 or 128

MB

None

Internal

11

CMM7686GX300-3V

12

CMM7686GX300-3V

C

HAPTER

2: G

ETTING

S

TARTED

For many users, the factory configuration of the cpuModule can be used to get a PC/104 system operational. If you are one of these users, you can get your system up and running quickly by following a few simple steps described in this chapter. Briefly, these steps are:

• Connect power.

• Connect the utility cable.

• Connect a keyboard.

• Default Bios Configuration

• Fail Safe Boot ROM

• Connect a VGA monitor to the SVGA connector.

Refer to the remainder of this chapter for details on each of these steps.

CMM7686GX300-3V

13

Basic Connector Locations

The following figure(s) and table show the connectors used in this chapter

.

14

CMM7686GX300-3V

CMM7686GX300-3V Basic Connector Locations

CN5

CN6

CN7

CN8

CN1

CN2

CN3

CN4

CN12

CN16

PC/104 Bus (XT)

PC/104 bus (AT)

Auxiliary power

PS/2 Mouse

Multifunction

Parallel Port

Serial Port1

Serial Port2

Video

PCI Bus

64 pin

40 pin

12 pin

4 pin

10 pin

26 pin

10 pin

10 pin

10 pin

120 pin

For a complete listing of connectors, please refer to I/O Connections.

NOTE!

Pin 1 of each connector is indicated by a square solder pad on the bottom of the PC board and a white square silkscreened on the top of the board.

CMM7686GX300-3V

15

Fail safe boot rom

Fail Safe Boot ROM is supplied with the board. This feature is programmed into a surface mount flash chip. The programmed boot rom is ROM-DOS™. Fail Safe Boot ROM allows the system to boot without any attached storage devices. i.e. floppy, IDE, SSD. Installing jumper JP5 will force the cpuModule to use fail safe boot rom. This configuration allows you to boot to nonvolitile onboard ROM-DOS™.

16

CMM7686GX300-3V

Cable Kits

For maximum flexibility, cables are not provided with the cpuModule. You may wish to purchase our cable kit for the cpuModule.

The XK-CM24 cable kit contains the following:

• Multifunction utility cable (keyboard socket, battery, reset, speaker)

• SVGA monitor (DIL 10 to high density 15 pin D SUB)

• Two serial port cables (DIL10 to DSUB9)

• Parallel port cable (DIL26 to DSUB25)

• Power cable (DIL12 to wire leads)

• PS/2 Mouse adapter (4 Pin DIL to PS/2 Female)

CMM7686GX300-3V

17

Connecting Power

WARNING!

If you improperly connect power, the module will almost certainly be

damaged or destroyed. Such damage is not warranted! Please verify connections to the module before applying power.

Power is normally supplied to the cpuModule through the PC/104 bus, connectors CN1 and CN2. If you are placing the cpuModule onto a PC/104 stack that has a power supply, you do not need to make additional connections to supply power.

If you are using the cpuModule without a PC/104 stack or with a stack that does not include a power supply, refer to Auxiliary Power, CN3 for more details.

18

CMM7686GX300-3V

Connecting the utility cable

The Multifunction connector CN5, implements the following interfaces:

• AT keyboard

• Speaker output

• System reset input

• Battery input

To use these interfaces, you must connect to the Multifunction connector, making sure the orientation of pin 1 is correct. If you are using the Multifunction cable from our cable kit, the cable provides a small speaker, a 5-pin circular DIN connector for the keyboard, a push-button for resetting the PC/

104 system, and a lithium battery to provide backup power to the Real Time Clock.

To connect individual devices to the Multifunction connector, please see Connecting the utility cable.

CMM7686GX300-3V

19

Connecting a Keyboard

You may plug a PC/AT compatible keyboard directly into the circular DIN connector of the Multifunction cable in our cable kit..

NOTE!

Some newer keyboards may use a smaller "mini-DIN" connector; you will need an adapter to plug these keyboards into the cpuModule.

These connectors are available for order instead of the default circular

DIN connector.

Many keyboards are switchable between PC/XT and AT operating modes, with the mode usually selected by a switch on the back or bottom of the keyboard. For correct operation with this cpuModule, you must select AT mode.

20

CMM7686GX300-3V

Connecting to the PC/104 Bus

The PC/104 bus connectors of the cpuModule are simply plugged onto a PC/104 stack to connect to other devices.

We recommend you follow the procedure below to ensure that stacking of the modules does not damage connectors or electronics.

WARNING!

Do not force the module onto the stack! Wiggling the module or applying too much pressure may damage it. If the module does not readily press into place, remove it, check for bent pins or out-of-place keying pins, and try again.

• Turn off power to the PC/104 system or stack.

• Select and install standoffs to properly position the cpuModule on the PC/104 stack.

• Touch a grounded metal part of the rack to discharge any buildup of static electricity.

• Remove the cpuModule from its anti-static bag.

• Check that keying pins in the bus connector are properly positioned.

• Check the stacking order; make sure an XT bus card will not be placed between two

AT bus cards or it will interrupt the AT bus signals.

• Hold the cpuModule by its edges and orient it so the bus connector pins line up with the matching connector on the stack.

• Gently and evenly press the cpuModule onto the PC/104 stack.

CMM7686GX300-3V

21

Connecting to the PC/104-Plus PCI Bus

The cpuModule is simply plugged onto a PC/104 stack. Other PC/104-Plus boards may then connect to the cpuModule’s PC/104-Plus bus connector. Supplying power to the PCI bus is provided by the cpuModule.

We recommend you follow the procedure described for the PC/104 bus.

There are three additional considerations when using the PCI bus, PCI Bus signaling level, the slot selection switches on add in boards, and 3.3 volt power source for the expansion cards.

22

CMM7686GX300-3V

PCI Bus Signaling Levels

The PCI bus can operate at 3.3 volt signaling level.

WARNING!

The bus can only operate as 3.3 Volt signaling only. You will have to ensure that all your expansion card can operate together at a single signaling level. The CPUmodule can supply a maximum of 2 Amps of current to the 3.3V supplies on the PCI bus.

CMM7686GX300-3V

23

Slot Selection Switches

Unlike PC/104 cards, PC/104 Plus expansion cards have a "slot" selection switch or jumpers.

In total, there are 4 PCI cards that can be stacked onto the cpuModule with switch positions 0 through 3. The distance from the CPU determines these switch settings. The card closest to the CPU is said to be in slot 0, the next closest slot 1 and so on to the final card as slot 3.

This requirement means that all PC/104 Plus cards must be stacked either on the top or the bottom of the CPU, not on both sides.

The "slot" setting method may vary from manufacturer to manufacturer, but the concept is the same.

The CPU is designed to provide the correct delay to the clock signals to compensate for the bus length. The correct switch setting ensures the proper clock delay setting, interrupt assignment, and bus grant/request channel assignment. Refer to the expansion board’s manual for the proper settings. Each expansion card must be in a different slot.

24

CMM7686GX300-3V

PCI Bus Expansion Card Power

+5 Volt DC

The +5 volt power pins on the PC/104 Plus PCI bus are directly connected to the +5 volt pins on the PC/

104 connector and the power connector CN3 (pins 2 and 8). +5 volt expansion boards can be powered directly from these pins.

+3.3 Volt DC

The default source for the +3.3 volt power pins on the PC/104 Plus PCI bus is a on board power converter. The on-board +5 volt to +3.3 volt converter is capable of suppling a maximum of 2 amps of 3.3 volts to the PCI bus. If 2 amps is not enough change solder blob BL1 from 1 and 2 to 2 and 3 . This change will connect the 3.3 volt power pins on the PCI bus to pins 10 and 12 on power connector CN3 .. This change will allow a new power source, connected to the power connector CN3, to drive the 3.3 volt power pins on the

PCI bus.

Booting the cpuModule for the First Time

• You can now apply power to the cpuModule.the cpuModule BIOS version information

• a message requesting you press {Del} to enter the Setup program

If you don’t press {Del}, the cpuModule will try to boot from the current settings.

.

If you press {Del}, the cpuModule will enter Setup. Once you have configured the cpuModule using

Setup, save your changes and reboot.

NOTE!

By default, boards are shipped with fail safe boot rom enable.

When Fail Safe Boot ROM is enabled the system will boot to it exclusively.

25

CMM7686GX300-3V

Default Configuration

In addition to the Setup configuration stored on the board, the cpuModule has a permanent default configuration. The system will resort to using this default if an error occurs when accessing the EPROM which holds the Setup on the module.

The default configuration is listed below.

NOTE!



26

CMM7686GX300-3V

Function

BIOS Default Configuration

Default selection

IDE Interface 0 Master

IDE Interface 0 Slave

Auto detect

Auto detect



Boot device

BIOS Extension

Auto detect

Auto detect

Floppy then hard disk

Disabled

Floppy Drive 1

Floppy Drive 2

Serial port 1

Serial port 2

Parallel Port

Keyboard

Video Resolution

Fail safe boot rom

3.5" 1.44 Meg not installed

RS232 at 3F8H

RS232 at 2F8H

LPT1 at 378H

Enabled if connected

High

Enabled

Select Active Video

Power Management

PNP OS Installed

Resources Controlled By

PCI IRQ Activated By

IDE HDD Block Mode

KBC Input Clock

SSD Window

Onboard Parallel Port

Parallel Port Mode

Halt On

Virus Warning

CPU Internal Cache

Cyrix 6X86/MII CPUID

Swap Floppy Drive

Boot Up Numlock Status

Gate A20 Option

Security Option

Integrated

Disabled

No

Auto

Level

Enabled

8 Mhz

D800:0000

378/IRQ7

SPP

No Errors

Disabled

Enabled

Enabled

Disabled

Off

Fast

Setup

Report No FDD for

WIN95

Quick Boot

Extended Memory Test

ISA Plug-n-Play Support

Video Bios Shadow

C8000-DFFFF

16-bit I/O Recovery

(Clock)

8-bit I/O Recovery (Clock)

Yes

Disabled

Disabled

Enabled

Enabled

Disabled

5

5

CMM7686GX300-3V

27

Booting to Boot Block Flash with Fail Safe Boot ROM

The Fail Safe Boot ROM is a special build of ROM-DOS™ located inside a surface mounted Boot

Block Flash chip that is memory mapped to the SSD window. Boot Block Flash is a write protected flash device that contains the BIOS and extra room where the Fail Safe Boot ROM is stored in the ROM DISK.

The build is special because it can understand the ROM DISK format on the flash chip. Additionally, Fail

Safe Boot ROM is an emergency interface accessible by an external computer. The ROM DISK contains

REMDISK and REMSERVE for remote access to the system’s disk drives. Due to the size of the flash chip,

Fail Safe Boot ROM contains an abreviated selection of the ROM-DOS™ utilities, however, the complete

ROM-DOS™ is contained on a floppy shipped with the board.

The purpose of the Fail Safe Boot ROM is to make the board bootable when the customer receives the cpuModule. Fail Safe Boot ROM can be used as an indicator of the board’s functionality when booting problems arise with another operating system. This test can be accomplished by installing JP5. Installing

JP5 forces the cpuModule to boot to Fail Safe Boot ROM. The ROM DISK that contains the Fail Safe Boot

ROM acts as an example of what can be programmed into the flash chip. Last, Fail Safe Boot ROM allows files to be transferred on or off the storage devices in the system by use of REMSERV and REMDISK, two

ROM-DOS™ utilities.

If the user would need remote access to the system run REMSERV on the target system and REM-

DISK on the host system. The end result would be that the storage devices on the target system would appear as additional drives on the host system. Information could then be transferred between hard disks by using a standard NULL Modem cable over a serial port. REMSERV makes the connection appear as an additional drive to the user. For details concerning this type of access, please refer to the ROM-DOS™ user’s guide shipped with your board

NOTE!



The first time, your system will boot to the DOS prompt at the first available drive letter. If you do not intend to use REMSERV or REMDISK or you intend to boot from another device, you will need to disable Fail Safe Boot ROM. See the steps below for the method to disable it.

• Reset the system by either shutting it off and turning it on or by using the reset button.

• while the system is booting repeatedly press the DEL key to enter the BIOS setup.

• Choose INTEGRATED PERIPHERALS using the arrow keys and enter.

• Once in INTEGRATED PERIPHERALS set Fail Safe Boot in SSD Win: Disabled

28

CMM7686GX300-3V

CMM7686GX300-3V

29

If You Misconfigure the cpuModule

It is possible that you may incorrectly configure the cpuModule using Setup. If this happens the correct procedure is:

• Start Re-booting the cpuModule.

• While the system is re-booting repeatedly press the {Del} key until the cpuModule enters Setup.

• Change the parameters to correctly match your system.

If the above fails:

• Insert jumper JP5. This will force the cpuModule to boot using fail safe boot rom.

• Boot the cpuModule.

• Press the {delete} key to enter Setup.

30

CMM7686GX300-3V

For More Information

This chapter has been intended to get the typical user up and running quickly. If you need more details, please refer to the following chapters for more information on configuring and using the cpu-

Module.

Phone: 814-234-8087

Fax: 814-234-5218



State College PA 16803-0906

USA

Our website: www.rtd.com

Our e-mail: [email protected]

CMM7686GX300-3V

31

32

CMM7686GX300-3V

C

HAPTER

3: C

ONNECTING THE CPU

M

ODULE

This chapter contains necessary information for any of the connectors on the cpuModule.

CMM7686GX300-3V

33

I/O Connections

The cpuModule comes from the factory ready to connect to the peripherals shown in the following table.

Default Peripheral Settings

Item

Boot device

SSD Power

Serial Port #1

Serial Port #2

Parallel Port

Video Resolution

Floppy Drive 1

Floppy Drive 2

All IDE Drives

Setting

Floppy / DOC

5V on board or battery

RS232 at 3F8H, IRQ 4

RS232 at 2F8H, IRQ 3

Bi-directional at 378H,

IRQ 7

2.5 MB, High

1.44M 3.5"

Not installed

Auto Detect

Controlled by

Setup

Jumper

Setup

Setup

Setup

Setup

Setup

Setup

Setup

If you are using peripherals compatible with this list, you do not need to configure any jumpers or software settings before connecting them. If you are using different peripherals, you may need to change the cpuModule settings. In that case, please see Configuring with the RTD Enhanced

Award BIOS.

34

CMM7686GX300-3V

Connector Locations

The figure and table below show all connectors and the SSD socket of the cpuModule.

CMM7686GX300-3V Connector Locations

CMM7686GX300-3V

35

NOTE!

Pin 1 of each connector is indicated by a square solder pad on the bottom of the PC board and a white box silkscreened on the top of the board.

Connector

CN1

CN2

CN3

CN4

CN5

CN6

CN7

CN8

CN12

CN16

Function

PC/104 XT Bus

PC/104 AT Bus

Auxiliary Power

Bus Mouse

Multifunction

Parallel port

Serial port 1

Serial port 2

Video

PCI BUS

Size

64 Pin

40 Pin

12 pin

4 pin

10 pin

26 pin

10 pin

10 pin

10 pin

120 pin

36

CMM7686GX300-3V

Auxiliary Power,

CN3

WARNING!

If you improperly connect power, the module will almost certainly be

destroyed. Please verify power connections to the module before applying power.

The power supply can be conveyed to the module either through the PC/104 bus ( CN1and CN2) or through the Auxiliary Power Connector, CN3. The cpuModule only uses +5 VDC and ground.

+12 VDC, -12 VDC and -5 VDC may be required on other PC/104 boards in the system..

Auxiliary Power Connector CN3

6

7

4

5

Pin

1

2

3

8

9

10

11

12

Signal

GND

+5 V

N/C

+12 V

-5 V

-12 V

GND

+5 V

GND

+3.3 V

CPU V+

+3.3 V

Function

Ground

+5 Volts DC

Not Connected

+12 Volts DC

-5 Volts DC

-12 Volts DC

Ground

+5 Volts DC

Ground

See Note

See Note

See Note

.

Insufficient current supply will prevent your cpuModule from booting. The gauge and length of the wire used for connecting power to the cpuModule must be taken into consideration. Some power connectors have clip leads on them and may have significant resistance. Make sure that the input voltage does not drop below 4.8V at the 5V power pins (see the table labeled Typical Power Consumption for the cpuModule’s power requirements). A good rule of thumb is to use wire that can supply twice the power your system requires.

NOTE!

Connect two separate wires to the +5V pins (2 and 8) on the power connector to ensure a good power supply. We recommend that no less than 22 gague wire be used and the length of this wire should not exceed 3 ft. Always measure the voltage drop from your power supply to the power pins on the cpuModule. The voltage at pins (2 and 8) should be

+5V.

37

CMM7686GX300-3V

Facing the connector pins, the pinout of the Auxiliary Power connector is:

11

CPU V+

3.3 V

12

9

GND

3.3 V

10

7

GND

+5V

8

5

-5V

-12V

6

3

N/C

+12V

4

1

GND

+5V

2

NOTES!

-5 VDC, +12 VDC and -12 VDC voltages are not used by the module, but are connected to the PC/104 bus connectors CN1 and CN2.

The 3.3 volt pins (10 and 12) on power connector CN3 can be are used to monitor the onboard 3.3 voltage regulator. In effect, these pins (10 and 12) become outputs. Don’t use these pins as a source of 3.3 volts to another board and don’t connect these pins to a 3.3 volt power supply.

The onboard 3.3 volt regulator is limited to 2 Amps maximum.

The CPU V+ pin 11 of CN3)is used to monitor the onboard CPU regulator which is 2.0 volts. Don’t use this as source of 2.0 volts and don’t connect this pin to a 2.0 volt power supply.

Pins 10 and 12 on CN3 are floating by default factory setting. These pins are not set up for monitoring or power. If monitoring is needed at these pins, please contact us for details.

Power Supply Protection

The cpuModule has protection circuitry which helps prevent damage due to problems with the +5V supply, such as:

• Reversed polarity

• Overvoltage

• Overcurrent

The circuitry includes a user-replaceable fuse, which is located near the PC/104 bus connector. This fuse is a:

• 3 amp Nano fuse

• Littelfuse part number 429003WR

38

CMM7686GX300-3V

CMM7686GX300-3V

39

Serial Port 1, CN7

The first serial port is implemented on connector CN7. It is normally configured as a PC compatible full-duplex RS232 port, but you may use the Setup program to re-configure it is as half-duplex

RS422 or full-duplex RS422 or RS485. The I/O address and corresponding interrupt must also be selected using Setup. The available I/O addresses and the corresponding interrupts are shown in the following table

First Serial Port Settings

I/O Address

IRQ

03F8H

02F8H

03E8H

02E8H

IRQ4

IRQ3

IRQ4

IRQ3

First Serial Port UART

The first serial port is implemented with a 16550-compatible UART (Universal Asynchronous Receiver/Transmitter). This UART is capable of baud rates up to 115.2 kbaud in 16450 and 16550A compatible mode and 1.5 Mbaud in Enhanced UART mode, and includes a 16-byte FIFO. Please refer to any standard PC-AT hardware reference for the register map of the UART.

RS232 Serial Port (Default)

The full-duplex RS232 mode is the default setting on the cpuModule. With this mode enabled, connector

CN7 must be connected to RS232 compatible devices. The following table gives the connector pinout and shows how to connect to an external serial connector, either DB25 or DB9 compatible.

6

7

4

5

Pin

1

2

3

8

9,10

Connector

CN7 in RS-232 Mode

Signal

DCD

DSR

RXD

RTS

TXD

CTS

DTR

RI

GND

Function

Data Carrier Detect

Data Set Ready

Receive Data

in/out DB25 DB9

in 8 1 in in

6

3

6

2

Request To Send

Transmit data out out

Clear To Send in

Data Terminal Ready out

Ring Indicate

Signal Ground in

--

4

2

5

20

22

7

9

5

8

4

7

3

40

CMM7686GX300-3V

Facing the serial port’s connector pins, the pinout is:

9

GND

GND

10

7

DTR

RI

8

5

TXD

CTS

6

3

RXD

RTS

4

1

DCD

DSR

2

RS422 or RS485 Serial Port

You may use Setup to configure the first serial port as RS422 or RS485. In this case, you must connect the serial port to an RS422 or RS485 compatible device.

When using RS422 or RS485 mode, you can use the port in either half-duplex (two-wire) or fullduplex (four-wire) configurations. For half-duplex (2-wire) operation, you must connect RXD+ to

TXD+, and connect RXD- to TXD-.

NOTE!

A 120 ohm termination resistors is provided on the cpuModule. Termination is usually necessary on all RS422 receivers and at the ends of the

RS485 bus.

If the termination resistor is required, it can be enabled by closing jumper JP1.

When using full-duplex (typically in 422 mode) connect the ports as shown in the table below.

Full-Duplex Connections

Port 1

RXD+

TXD+

RXD-

TXD-

Port 2

TXD+

RXD+

TXD-

RXD-

When using half-duplex in 485 connect the ports as shown in the table below.

Half-Duplex 485 Mode

From To

Port 1 TXD+ Port 1 RXD+

Port 1 TXDPort 1 RXD-


Port 1 RXDPort 2 TXD-

41

CMM7686GX300-3V

RS422 and RS485 Mode Pinout

The following table gives the pinout of the serial port connector when RS422 or RS485 modes are enabled.

Pin

1

6

7

8

9,10

4

5

2

3

Connector

CN7 in RS-422/485 Mode

Signal

--

--

RXD-

TXD+

TXD-

RXD+

--

-gnd

Function

Data Carrier

Detect

Data Set Ready

Receive Data (-)

Transmit Data (+)

Transmit Data (-)

Receive Data (+)

Reseved

Reseved

Signal ground

in/out

-in

--

-out

-in out out

DB9

1

9

5

8

4

7

3

6

2

Facing the serial port connector, the pinout is:

9

GND

GND

10

7

Rsvd

Rsvd

8

5

TXD-

RXD+

6

3

RXD-

TXD+

4

1

Rsvd

Rsvd

2

NOTE!

when using RS422 or RS485 Mode

When using the serial port in RS422 or RS485 mode, the serial transmitters are enabled and disabled under software control.

The transmitters are enabled by manipulating the Request To

Send (RTS*) signal of the first serial port controller or by I/O port 0x18. This signal is controlled by writing bit 1 of the Modem Control Register (MCR) or writting toI/O port 0x18 as follows:

• If MCR bit 1 = 1, then RTS* = 0, and serial transmitters are disabled

• If MCR bit 1 = 0, then RTS* = 1, and serial transmitters are enabled

• If Port 0x18h OR 0xCh then transmitters always on

• If Port 0x18h AND 0x3h then transmitters under

RTS* control

For more information on the serial port registers, including the MCR, please refer to a standard PC-AT hardware reference for the 16550-type

UART.

42

CMM7686GX300-3V

Serial Port 2, CN8

The second serial port is implemented on connector

CN8

. It is normally configured as a PC compatible full-duplex RS232 port, but you may use the Setup program to re-configure is as half- or fullduplex RS422 or RS485. The I/O address and corresponding interrupt must also be selected using

Setup. The available I/O addresses and the corresponding interrupts are shown in the following table

Second Serial Port Settings

I/O Address

Default IRQ

03F8H

02F8H

03E8H

02E8H

IRQ4

IRQ3

IRQ4

IRQ3

Second Serial Port UART

The second serial port is implemented with a 16550-compatible UART (Universal Asynchronous

Receiver/Transmitter). This UART is capable of baud rates up to 115.2 kbaud in 16450 and 16550A compatible mode and 1.5 Mbaud in Enhanced UART mode, and includes a 16-byte FIFO. Please refer to any standard PC-AT hardware reference for the register map of the UART.

RS232 Serial Port (Default)

The full-duplex RS232 mode is the default setting on the cpuModule. With this mode enabled, the serial port connector must be connected to RS232 compatible devices. The following table gives the connector pinout and shows how to connect to an external serial connector, either XT (DB25) or

AT(DB9) compatible.

Facing the serial connector pins, the pinout is:

9

GND

GND

10

7

DTR

RI

8

5

TXD

CTS

6

3

RXD

RTS

4

1

DCD

DSR

2

The following table gives the pinout of the serial port connector when RS232 mode is enabled.

6

7

4

5

Pin

1

2

3

Connector

CN8 in RS-232 Mode

Signal

DCD

DSR

RXD

RTS

TXD

CTS

DTR

Function

Data Carrier Detect

Data Set Ready

Receive Data

in/out DB25

in 8 in in

6

3

Request To Send

Transmit data out out

Clear To Send in

Data Terminal Ready out

4

2

5

20

43

CMM7686GX300-3V

8

9,10

Connector

CN8 in RS-232 Mode

RI

GND

Ring Indicate

Signal Ground in

--

22

7

RS422 or RS485 Serial Port

You may use Setup to configure the second serial port as RS422 or RS485. In this case, you must connect the serial port to an RS422 or RS485 compatible device.

When using RS422 or RS485 mode, you can use the port in either half-duplex (two-wire) or fullduplex (four-wire) configurations. For half-duplex (2-wire) operation, you must connect RXD+ to

TXD+, and connect RXD- to TXD-..

NOTE!

A 120 ohm termination resistors is provided on the cpuModule. Termination is usually necessary on all RS422 receivers and at the ends of the

RS485 bus.

If the termination resistor is required, it can be enabled by closing jumper JP2.

When using full-duplex (typically in 422 mode) connect the ports as shown in the table below.

Full-Duplex Connections

Port 1

RXD+

TXD+

RXD-

TXD-

Port 2

TXD+

RXD+

TXD-

RXD-

When using half-duplex in 485 connect the ports as shown in the table below.

Half-Duplex 485 Mode

From To


Port 1 TXDPort 1 RXD-


Port 1 RXDPort 2 TXD-

The following table gives the pinout of connector CN8 when RS422 or RS485 modes are enabled.

Pin

1

2

3

4

Connector CN8 in RS-422/485 Mode

Signal

--

--

RXD-

TXD+

Function

Data Carrier

Detect

Data Set Ready

Receive Data (-)

Transmit Data (+)

in/out

--

-in out

DB9

1

6

2

7

44

CMM7686GX300-3V

7

8

5

6

9,10

Connector CN8 in RS-422/485 Mode

TXD-

RXD+

--

-gnd

Transmit Data (-)

Receive Data (+)

Reseved

Reseved

Signal ground

Facing the serial port

’s connector pins, the pinout is: out in

--

-out

4

9

3

8

5

9

GND

GND

10

7

Rsvd

Rsvd

8

5

TXD-

RXD+

6

3

RXD-

TXD+

4

1

Rsvd

Rsvd

2

NOTE!

when using RS422 or RS485 Mode

When using the serial port in RS422 or RS485 mode, the serial transmitters are enabled and disabled under software control.The transmitters are enabled by manipulating the Request

To Send (RTS*) signal of the first serial port controller or by

I/O port 0x18.This signal is controlled by writing bit 1 of the

Modem Control Register (MCR) or writting toI/O port 0x18 as follows:

• If MCR bit 1 = 1, then RTS* = 0, and serial transmitters are disabled

• If MCR bit 1 = 0, then RTS* = 1, and serial transmitters are enabled

• If Port 0x18h OR 0xCh then transmitters always on

• If Port 0x18h AND 0x3h then transmitters under

RTS* control

For more information on the serial port registers, including the MCR, please refer to a standard PC-AT hardware reference for the 16550-type

UART.

CMM7686GX300-3V

45

Parallel Port, CN6

The parallel port is available on connector

CN6

. You can use Setup to select its address, associated interrupt, and choose between its operational modes (SPP, ECP, EPP 1.7 and EPP 1.9).

The pinout of the connector allows a ribbon cable to directly connect it to a DB25 connector, thus providing a standard PC compatible port.

46

CMM7686GX300-3V

The following tables lists the parallel port signals and explains how to connect it to a DB25 connector to obtain a PC compatible port.

NOTE!

11

12

13

14

9

10

7

8

5

6

3

4

Pin

1

2

19

20

21

22

15

16

17

18

23

24

For correct operation, keep the length of the cable connecting the cpu-

Module and parallel device less than 3 meters (10 feet).

Parallel Port Connector,

CN6

Signal

Parallel Port Connector,

CN6

Function

STB

AFD

PD0

ERR

PD1

INIT

PD2

SLIN

PD3

GND

PD4

GND

PD5

GND

PD6

GND

PD7

GND

ACK

GND

BSY

GND

PE

GND

Strobe Data

Autofeed

Printer Data 0 (LSB)

Printer Error

Parallel Data 1

Initialize printer

Printer Data 2

Select printer

Printer Data 3

Signal ground

Printer Data 4

Signal ground

Printer Data 5

Signal ground

Printer Data 6

Signal ground

Printer Data 7 (MSB)

Signal ground

Acknowledge

Signal ground

Busy

Signal ground

Paper End

Signal ground

in/out DB25

out out

1

14 out in out out out out out

-out

-out

-out

-out

-in

-in

-in

--

10

23

11

24

8

21

9

22

6

19

7

20

4

17

5

18

2

15

3

16

12

25

47

CMM7686GX300-3V

48

CMM7686GX300-3V

25

26

SLCT

GND

Parallel Port Connector,

CN6

Ready To Receive

Signal ground in

--

13

26

Multifunction Connector, CN5

The Multifunction connector implements the following functions:

• Speaker output

• AT keyboard

• System reset input

• Watchdog Timer output

• Battery Input

The following table gives the pinout of the Multifunction connector.

6

7

4

5

Pin

1

2

3

8

9

10

Multifunction Connector CN5

Signal

SPKR+

SPKR-

RESET

--

KBD

KBC

GND

KBP

BAT

--

Function in/out

Speaker output (open collector) out

Speaker output (+5 volts)

Manual push button reset out in

Not connected

Keyboard Data

Keyboard Clock

Ground

-in out

--

Keyboard Power (+5 volts)

Battery input

Not Connected out in

--

Facing the connector pins, the pinout is:

9 7

BAT

10

GND

KBP

8

5

KBD

KBC

6

3 1

RESET SPKR+

SPKR-

4 2

Speaker

A speaker output is available on pins 1 and 2of the Multifunction connector. These outputs are controlled by a transistor to supply 0.1 watt of power to an external speaker. The external speaker should have 8 ohm impedance and be connected between pins 1 and 2.

Keyboard

An AT compatible keyboard can be connected to the Multifunction connector. Usually PC keyboards come with a cable ending with a 5-pin male ’DIN’ connector. The following table lists the relationship between the Multifunction connector pins and a standard ’DIN’ keyboard connector.

49

CMM7686GX300-3V

Pin

5

6

7

8

Keyboard Connector Pins on CN5

Signal Function

KBD

KBC

GND

KBP

Keyboard Data

Keyboard Clock

Ground

Keyboard Power (+5 Volts)

DIN

2

1

4

5

To ensure correct operation, check that the keyboard is either an AT compatible keyboard or a switchable XT/AT keyboard set to AT mode. Switchable keyboards are usually set by a switch on the back or bottom of the keyboard.

System Reset

Pin 3 of the multifunction connector allows connection of an external push-button to manually reset the system. The push-button should be normally open, and connect to ground when pushed.

Battery

Pin 9 of the multifunction connector is the connection for an external backup battery (in the range

2.40 V to 4.15 V; typically 3.0 or 3.6 V). This battery is used by the cpuModule when system power is removed, to preserve the date and time in the Real Time Clock and preserve SRAM contents if the

SSD jumpers are configured for battery backup.

50

CMM7686GX300-3V

VGA Video Connector, CN12

The following table gives the pinout of the video connector.

6

7

4

5

Pin

1

2

3

8

9

10

VGA Video Connector, CN12

Signal

VSYNC

Function

Vertical Sync

in/out

out

HSYNC Horizontal Sync out

DDCSCL Monitor communications clock out

RED

DDCSDA

GREEN

N/C

Red analog output

Green analog output

Not connected out

Monitor communications data bidi out

--

BLUE

GND

GND

Blue analog output

Ground

Ground out out out

. Facing the connector pins of CN12, the pinout is:

9

GND

GND

10

7

N/C

BLUE

8

5

DDCSDA

GREEN

6

3

DDCSCL

RED

4

1

VSYNC

HSYNC

2

Supported Video Resolutions and BIOS Settings

Resolution Colors Refresh Rate Minimum BIOS Video

Resolution Setting

640 x 480

640 x 480

640 x 480

640 x 480

256

256

256

256

640 x 480 64 K

640 x 480 64 K

640 x 480 64 K

640 x 480 64 K

800 x 600

800 x 600

800 x 600

800 x 600

256

256

256

256

800 x 600 64 K

800 x 600 64 K

800 x 600 64 K

800 x 600 64 K

1024 x 768 256

60

72

75

85

60

72

75

85

60

72

75

85

60

72

75

85

60

Low 1.25 MB

Low 1.25 MB

Low 1.25 MB

Low 1.25 MB

Medium 1.5 MB

Medium 1.5 MB

Medium 1.5 MB

Medium 1.5 MB

Low 1.25 MB

Low 1.25 MB

Low 1.25 MB

Low 1.25 MB

Medium 1.5 MB

Medium 1.5 MB

Medium 1.5 MB

Medium 1.5 MB

Low 1.25 MB

CMM7686GX300-3V

51

52

CMM7686GX300-3V

Supported Video Resolutions and BIOS Settings

Resolution Colors Refresh Rate Minimum BIOS Video

Resolution Setting

1024 x 768

1024 x 768

256

256

1024 x 768 256

1024 x 768 64 K

1024 x 768 64 K

1024 x 768 64 K

1024 x 768 64 K

1280 x 1024 256

1280 x 1024 256

1280 x 1024 256

1280 x 1024 256

1280 x 1024 64 K

1280 x 1024 64 K

1280 x 1024 64 K

70

75

85

60

70

75

85

60

70

75

85

60

75

85

Low 1.25 MB

Low 1.25 MB

Low 1.25 MB

High 2.5 MB

High 2.5 MB

High 2.5 MB

High 2.5 MB

High 4.0 MB

High 4.0 MB

High 4.0 MB

High 4.0 MB

High 4.0 MB

High 4.0 MB

High 4.0 MB

Bus Mouse Connector, CN4

The following table gives the pinout of the Bus Mouse connector.

Pin

1

2

3

4

Bus Mouse Connector,

CN4

Signal

+5 V

GND

MCLK

MDAT

Function

+5 Volts

Ground

Mouse Clock

Mouse Data

Facing the connector pins, the pinout is:

3

MCLK

MDAT

4

1

+5 V

GND

2

in/out

out out out bidi

CMM7686GX300-3V

53

PC/104 Bus, CN1 and CN2

Connectors

CN1 and CN2 carry signals of the PC/104 bus; these signals match definitions of the

IEEE P996 standard. The following tables list the pinouts of the PC/104 bus connectors.

The following table lists the signals of the XT portion of the PC/104 bus (see Notes below AT Bus table).

28

29

30

31

32

24

25

26

27

20

21

22

23

16

17

18

19

12

13

14

15

8

9

10

11

6

7

4

5

Pin

1

2

3

PC/104 XT Bus Connector, CN1

SA7

SA6

SA5

SA4

SA3

SA2

SA1

SA0

0V

SA15

SA14

SA13

SA12

SA11

SA10

SA9

SA8

Row A

N.C.

SD7

SD6

SD5

SD4

SD3

SD2

SD1

SD0

IOCHRDY

AEN

SA19

SA18

SA17

SA16

DRQ3

DACK1*

DRQ1

REFRESH*

SYSCLK

IRQ7

IRQ6

IRQ5

IRQ4

IRQ3

DACK2*

TC

BALE

+5V

OSC

0V

0V

Row B

0V

RESETDRV

+5V

IRQ2

-5V

DRQ2

-12V

N.C.

+12V

(Keying pin)

SMEMW*

SMEMR*

IOW*

IOR*

DACK3*

54

CMM7686GX300-3V

The following table lists signals of the AT portion of the PC/104 bus.

PC/104 AT Bus Connector,

CN2

10

11

12

13

8

9

6

7

4

5

2

3

Pin

0

1

14

15

16

17

18

19

LA19

LA18

LA17

MEMR*

MEMW*

SD8

SD9

SD10

Row C

0V

SBHE*

LA23

LA22

LA21

LA20

SD11

SD12

SD13

SD14

SD15

(Keying pin)

Row D

0V

MEMCS16*

IOCS16*

IRQ10

IRQ11

IRQ12

IRQ15

IRQ14

DACK0*

DRQ0

DACK5*

DRQ5

DACK6*

DRQ6

DACK7*

DRQ7

+5V*

MASTER*

0V

0V

Notes:

ISA bus refresh is not supported by this cpuModule.

Keying pin positions have the pin cut on the bottom of the board and the hole plugged in the connector to prevent misalignment of stacked modules. This is a feature of the PC/104 specification and should be implemented on all mating PC/104 modules.

Signals marked with (*) are active-low.

All bus lines can drive a maximum current of 4 mA at TTL voltage levels.

55

CMM7686GX300-3V

PC/104 Bus Signals

The following table contains brief descriptions of the PC/104 bus signals.

PC/104 Bus Signals

Signal I/O Description

AEN

BALE

DACKx*

DRQx

ENDXFR*

IOCHCHK*

IOCHRDY

IOCS16*

IOR*

IOW*

IRQx

KEY

LA23..LA17

O

O

O

Address ENable: when this line is active (high), it means a DMA transfer is being performed, and therefore, the DMA controller has control over the data bus, the address bus, and the control lines.

Bus Address Latch Enable, active high. When active, it indicates that address lines SA0 to SA19 are valid.

DMA ACKnowledge x=0-7, active low, used to acknowledge DMA requests.

I

I/O This is the only synchronous signal of the PC/104 bus and it is active low. It indicates that the current bus cycle must be performed with 0 wait states. It is used only for 16-bit boards.

I

DMA Request x=0-7: these are asynchronous lines used by peripheral devices to request DMA service. They have increasing priority from

DRQ0 up to DRQ7. A DMA request is performed by setting the DRQ line high and keeping it high until the corresponding DACK line is activated.

I

I/O Channel Check, active low, indicates an error condition that cannot be corrected.

I/O Channel Ready: this line, usually high (ready) is pulled to a low level by devices which need longer bus cycles.

I

O

O

I/O Chip Select 16-bit: this line, active low, is controlled by devices mapped in the I/O address space. It indicates they have a 16-bit bus width.

I/O Read, active low, indicates when the devices present on the bus can send their information on the data bus.

I/O Write, active low. When active, it allows the peripheral devices to read data present on the data bus.

I Interrupt Request: x = 2 to 15, active on rising edge. IRQ15 has top priority; the other lines have decreasing priority starting from IRQ14 down to IRQ2. An interrupt request is performed by changing the level of the corresponding line from low to high and keeping it high until the microprocessor has recognized it.

N/A These locations contain mechanical keying pins to help prevent incorrect connector insertion.

O These signals select a 128kbyte window in the 16Mbyte address space available on the bus.

56

CMM7686GX300-3V

MASTER*

MEMCS16*

MEMR*

MEMW*

OSC

REFRESH*

RESETDRV

SA0..19

SBHE*

SD8..15

SD0..7

SMEMR*

SMEMW*

SYSCLK

TC

I

I

PC/104 Bus Signals

During a DMA cycle, this active-low signal, indicates that a resource on the bus is about to drive the data and address lines.

Memory Chip Select 16-bit: this line, active low, is controlled by devices mapped in the memory address space and indicates they have a

16-bit bus width.

O

O

O

I/O This active-low signal indicates a memory read operation. Devices using this signal must decode the address on lines LA23..LA17 and

SA19..SA0.

I/O This active-low signal indicates a memory write operation. Devices using this signal must decode the address on lines LA23..LA17 and

SA19..SA0.

O OSCillator: clock with a 70 ns period and a 50% duty cycle. It is a

14.31818 MHz always presents.

I

O

This cpuModule does not support refresh on the ISA bus. This pin is pulled high with a 4.7 K ohm resistor and may be driven by another card in the PC/104 stack.

This line, active high, is used to reset the devices on the bus, at poweron or after a reset command.

O Address bits 0 to 19: these lines are used to address the memory space and the I/O space. SA0 is the least significant bit while SA19 is the most significant bit.

O This active-low signal indicates a transfer of the most significant data byte (SD15..SD8).

I/O Data bits: these are the high-byte data bus lines. SD8 is the least significant bit; SD15 the most significant bit.

I/O Data bits: these are the low-byte data bus lines. SD0 is the least significant bit; SD7 the most significant bit.

O

Memory Read command, active low.

Memory Write command, active low.

System Clock, 8.0MHz with a 50% duty cycle. Only driven during external bus cycles.

Terminal Count: this line is active high and indicates the conclusion of a DMA transfer.

57

CMM7686GX300-3V

PC/104 Bus Termination

Termination of PC/104 bus signals is not recommended since this cpuModule incorporates source termination on bus signals and may cause malfunctions of the cpuModule.

58

CMM7686GX300-3V

Pin

1

22

23

24

25

18

19

20

21

26

27

28

29

30

14

15

16

17

10

11

12

13

8

9

6

7

4

5

2

3

PC/104-Plus PCI Bus, CN16

Connector CN16 carries the signals of the PC/104-Plus PCI bus. These signals match definitions of the PCI Local Bus specification Revision 2.1. The following tables list the pinouts of the PC/104-

Plus bus connector.

PC/104-Plus Bus Signal Assignments

A

AD21

+3.3V

IDSEL0

AD24

GND

AD29

+5V

REQ0*

GND

GNT1*

+5V

CLK2

GND

+12V

-12V

GND/5.0V KEY

1

VI/O

AD05

C/BE0*

GND

AD11

AD14

+3.3V

SERR*

GND

STOP*

+3.3V

FRAME*

GND

AD18

B

Reserved

GND

C/BE3*

AD26

+5V

AD30

GND

REQ2*

VI/O

CLK0

+5V

INTD*

INTA*

Reserved

PERR*

+3.3V

TRDY*

GND

AD16

+3.3V

AD20

AD23

AD02

GND

AD07

AD09

VI/O

AD13

C/BE1*

GND

C

+5V

IDSEL1

VI/O

AD25

AD28

GND

REQ1*

+5V

GNT2*

GND

CLK3

+5V

INTB*

Reserved

+3.3V

LOCK*

GND

IRDY*

+3.3V

AD17

GND

AD22

AD01

AD04

GND

AD08

AD10

GND

AD15

SB0*

D

AD00

+5V

AD03

AD06

GND

M66EN

AD12

+3.3V

PAR

SDONE

GND

DEVSEL*

+3.3V

C/BE2*

GND

AD19

+3.3V

IDSEL2

IDSEL3

GND

AD27

AD31

VI/O

GNT0*

GND

CLK1

GND

RST*

INTC*

GND/3.3V KEY

1

Notes:

1. The KEY pins are to guarantee proper module installation. Pin-A1 is removed and the female side plugged for 5.0V I/O signals and Pin-D30 is modified in the same manner for 3.3V I/O. It is recommended that both KEY pins (A1 and D30) be electrically connected to GND for shielding.

59

CMM7686GX300-3V

PC/104-Plus PCI Bus Signals

The following are brief descriptions of the PC/104-Plus PCI bus signals.

Address and Data

AD[31:00] -- Address and Data are multiplexed. A bus transaction consists of an address cycle followed by one or more data cycles.

C/BE[3:0]* -- Bus Command/Byte Enables are multiplexed. During the address cycle, the command is defined. During the Data cycle, they define the byte enables.

PAR -- Parity is even on AD[31:00] and C/BE[3:0]* and is required.

Interface Control Pins

FRAME* -- Frame is driven by the current master to indicate the start of a transaction and will remain active until the final data cycle.

TRDY* -- Target Ready indicates the selected devices ability to complete the current data cycle of the transaction. Both IRDY* and TRDY* must be asserted to terminate a data cycle.

IRDY* -- Initiator Ready indicates the master's ability to complete the current data cycle of the transaction.

STOP* -- Stop indicates the current selected device is requesting the master to stop the current transaction.

DEVSEL* -- Device Select is driven by the target device when its address is decoded.

IDSEL -- Initialization Device Select is used as a chip-select during configuration.

LOCK* -- Lock indicates an operation that may require multiple transactions to complete.

Error Reporting

PERR* -- Parity Error is for reporting data parity errors.

SERR* -- System Error is for reporting address parity errors.

Arbitration (Bus Masters Only)

REQ* -- Request indicates to the arbitrator that this device desires use of the bus.

GNT* -- Grant indicates to the requesting device that access has been granted.

System

CLK -- Clock provides timing for all transactions on the PCI bus.

RST* -- Reset is used to bring PCI-specific registers to a known state.

Interrupts

INTA* -- Interrupt A is used to request Interrupts.

INTB* -- Interrupt B is used to request Interrupts only for multi-function devices.

INTC* -- Interrupt C is used to request Interrupts only for multi-function devices.

INTD* -- Interrupt D is used to request Interrupts only for multi-function devices.

60

CMM7686GX300-3V

Power Supplies and VIO

+5V -- +5 volt supply connected to PC/104 bus and power connector +5V supplies.

+12V -- +12 volt supply connected to PC/104 bus and power connector +12V supplies.

-12V -- -12 volt supply connected to PC/104 bus and power connector -12V supplies.

+3.3V -- +3.3 volt supply is an on-board converter which can deliver up to 2 amps.

VIO -- This signal typically is the I/O power to the bus drivers on a PCI bus card. BL3 selects +3.3

volts to indicate +3.3 volt signaling. The default is +3.3 volts. No other device except this board should drive the VIO pin.

CMM7686GX300-3V

61

62

CMM7686GX300-3V

C

HAPTER

4: C

ONFIGURING THE CPU

M

ODULE

(BIOS

S

ETUP

)

This chapter contains information to configure the cpuModule.

Topics covered in this chapter include:

• Entering Setup

• Default Configuration

• Disabling Fail Safe Boot ROM

• Configuring Using the Setup Program

• Adding SSD Memory

CMM7686GX300-3V

63

Entering the BIOS Setup

• Apply power to the system

• Repeatedly press the DEL key to enter setup

64

CMM7686GX300-3V


In addition to the Setup configuration stored on the board, the cpuModule has a permanent default configuration. The system will resort to using this default if an error occurs when accessing the

EPROM which holds the Setup on the module.


Function





Auto detect

Auto detect



Boot device

BIOS Extension

Auto detect

Auto detect


Disabled

Floppy Drive 1

Floppy Drive 2

Serial port 1

Serial port 2

Parallel Port

Keyboard

Video Resolution

Fail safe boot rom


RS232 at 3F8H

RS232 at 2F8H

LPT1 at 378H


High

Enabled

Select Active Video

Power Management

PNP OS Installed



IDE HDD Block Mode

KBC Input Clock

SSD Window


Parallel Port Mode

Halt On

Virus Warning

CPU Internal Cache


Swap Floppy Drive


Gate A20 Option

Security Option

Report No FDD for

WIN95

Quick Boot



Disabled

Disabled

Enabled

Integrated

Disabled

No

Auto

Level

Enabled

8 Mhz

D800:0000

378/IRQ7

SPP

No Errors

Disabled

Enabled

Enabled

Disabled

Off

Fast

Setup

Yes

65

CMM7686GX300-3V

NOTE!

Video Bios Shadow

C8000-DFFFF

16-bit I/O Recovery

(Clock)


Enabled

Disabled

5

5

Boards are shipped with fail safe boot rom enable. See the chapter on

Configuring the cpuModule (BIOS setup) in Disabling Fail Safe Boot

ROM for the method to disable it.


66

CMM7686GX300-3V

Disabling Fail Safe Boot Rom

• Reset the system by either shutting it off and turning it on or by using the reset button.

• while the system is booting repeatedly press the DEL key to enter the BIOS setup.

• Choose INTEGRATED PERIPHERALS using the arrow keys and enter.

• Once in INTEGRATED PERIPHERALS set Fail Safe Boot in SSD Win: Disabled

CMM7686GX300-3V

67

Installing SSD Memory

This section explains how to add SSD devices to the cpuModule. This procedure is only necessary when you wish to add or change Solid State Disk memory devices

You may wish to install SSD memory to use the cpuModule as a "diskless" stand-alone device.

Refer to Storing Applications On-board for more information on various SSD device types. Solid

State Disk memories are placed in SSD socket U16

The following table lists possible configurations for the SSD socket:

SSD Support

Type

Part

Atmel 5V Flash

BIOS Extension

Devices

NOVRAM

SRAM

12V Flash

AMD 5V Flash

EPROM

29C010A

29C040A

DiskOnChip and

PromDisk

Boot Block

Flash

DS1645Y

DS1650Y

128KB

512KB

28F010

28F020

29F010

29F040

27C010

27C020

27C040

27C080

Operation

read/write read/write read/write read/write read-only read-only read-only read-only read-only read-only read-only read-only

Capacity

read/write read/write

128KB

512KB read/write to 288 MB+

128KB

512KB

128KB

512KB

128KB

256KB

128KB

512KB

128KB

256KB

512KB

1MB

Notes

battery backup battery backup read-only read-only read-only read-only read-only read-only read-only read-only

68

CMM7686GX300-3V

Quick Boot Description

The BIOS contains a Quick Boot option which minimizes the boot time for standard time critical systems. Quick Boot eliminates the exhaustive tests that are performed during POST while maintaining the functionality of the board (see note #1). By enabling the Quick Boot feature, your system can achieve 5 second boot times as shown in the table below.

BIOS Settings and Boot Times

Normal Boot Quick Boot

Standard RTD Defaults ~ 16 seconds < 10 seconds

Primary Master : None

Primary Slave : None

Secondary Master : None

Secondary Slave : None

Device in SSD Socket #1 : ATMEL-512k

SSD Window

Drive A:

: D800:0000

: SSD

~ 20 seconds < 6 seconds

Same configuration as above including

ISA Plug-n-Play Support : Disabled

~ 18 seconds < 5 seconds

To achieve boot times of 6 seconds or less, you will have to disable the HDD and possibly any other devices attached to the IDE controller. Booting to a SSD (see note #2) device is faster than a hard drive.

To achieve boot times of 5 seconds or less, ISA Plug-n-Play Support must be disabled. If there is not an ISA PnP card attached to your system then disabling this feature will save at least 1 second. Some modern operating systems (Windows) will automatically configure ISA PnP devices. If using one of these operating systems, ISA Plug-n-Play cards will still work even if it is disabled in the BIOS. Check with your OS vendor to see if ISA auto configuration is supported.

Quick Boot in conjunction with the watch dog timer allows frozen systems or systems with temporary power loss to become operable again within a few seconds. This can reduce the risk of complete system failure.

NOTE!

1) NumLock will always be off on boot up when Quick Boot is enabled

2) DiskOnChip devices contain their own embedded firmware. Boot times can vary because of its initialization process. Contact M-Systems for more information.

69

CMM7686GX300-3V

Configuring with the RTD Enhanced Award BIOS

The cpuModule Setup program allows you to customize the cpuModule's configuration. Selections made in Setup are stored on the board and are read by the BIOS at power-on.

Starting Setup

You can run Setup by:

• Re-boot the cpuModule, and press the {Del} key.

When you are finished with Setup, save your changes and exit. The system will automatically reboot.

Using the Setup Program

All displays in Setup consist of two areas. The left area lists the available selections. The right area displays help messages which you should always read.

Field Selection

You move between fields in Setup using the keys listed below.

Setup Keys

Key

Æ,Å,

È,Ç

+, -,

<PgUp>,

<PgDn>

<Enter>

<Esc>

Function

move between fields selects next/previous values in fields

Go to the submenu for the field.

to previous menu then to exit menu

70

CMM7686GX300-3V

Main Menu Setup Fields

The following is a list of Main menu Setup fields.

Main Menu Setup Fields

Field

Standard CMOS

Setup

BIOS Features

Setup

Chipset Features

Setup

Power management Setup

PNP/PCI Configuration Setup

Load RTD Defaults

Integrated Peripherals

Supervisor Password

User Password

IDE HDD Auto

Detection

Save and Exit

Setup

Exit without

Saving

Active keys

Press <Enter> to select












Selections

Access commonly used settings for the floppy drives, hard disks, and video.

Access settings for BIOS features such as boot sequence, keyboard options and test options.

Set chipset specific options.

Set power management options.

Set PNP and PCI options.

Load setup defaults except Standard CMOS Setup

Set I/O device options

Set supervisor access password.

Set user access password.

Have the BIOS detect the IDE hard disks connected to the system.

Save your changes and exit Setup.

Exit Setup without saving changes.

CMM7686GX300-3V

71

Standard CMOS Setup

The following is an alphabetical list of Standard CMOS Setup fields.BIOS Features Setup

Standard CMOS Setup Fields

Field Active keys Selections

Date {0..9},{

↵}

Sets the date with the format:

• month / day / year

• You must connect a backup battery, or this setting will be lost at power down.

Time {0..9},{

↵}

Sets the time with the format:

• hour: minute: second

• You must connect a backup battery, or this setting will be lost at power down.

Hard Disk

Primary Master

Primary Slave

Secondary Master

Secondary Slave

+, -, <PgUp>,

<PgDn>

Selects the IDE hard disk type for each interface.

An interface must have a master before a slave can be added. Make sure you configure the drive jumpers correctly.

Selections are:

• None

• Auto (Auto detect drive parameters, not all drives can be auto detected)

• 1 - 45 Standard drive types

• USER (User enters drive parameters)

Drive A

Drive B

Video

+, -, <PgUp>,

<PgDn>

+, -, <PgUp>,

<PgDn>

•

•

•

•

•

•

Selects the format of each floppy disk:

Selections are:

• None

360 KB, 5

¼

" Floppy

1.2 MB, 5¼" Floppy

720 KB, 3

½

" Floppy

1.44/1.25 MB, 3

½

" Floppy

2.88 MB, 3

½

" Floppy

• EGA\VGA

• CGA 40

• CGA 80

• MONO

Halt On +, -, <PgUp>,

<PgDn>

• All, But Keyboard

• All, But Diskette

• All, But Disk/Key

• All Errors

• No Errors

72

CMM7686GX300-3V

BIOS Features Setup

The following is a list of BIOS Features Setup fields.

BIOS Features Setup Fields

Cache

Field

Virus warning

CPU Internal

Active keys

+, -, <PgUp>,

<PgDn>

+, -, <PgUp>,

<PgDn>

Selections

Enable or disable virus warning

• Enable -- Warn if boot sector or partition table is being modified

• Disable -- Allow boot sector or partition table modification

Enable or disable CPU internal cache

• Enable -- Enable CPU internal 16 KB cache

• Disable -- Disable CPU internal 16 KB cache

Select from the options the boot sequence for the

CPU

Boot Sequence +, -, <PgUp>,

<PgDn>

Swap floppy drive +, -, <PgUp>,

<PgDn>

Boot up numlock status

Gate A20 option

Security option

Report No FDD for

Win95

+, -, <PgUp>,

<PgDn>

+, -, <PgUp>,

<PgDn>

+, -, <PgUp>,

<PgDn>

+, -, <PgUp>,

<PgDn>

Swap floppy drive A: and B:

• Enable -- Floppy connected after the twist in the floppy wire will be Drive B: and floppy connected before the twist in the floppy wire will be Drive A:

• Disable (Normal) -- Floppy connected after the twist in the floppy wire will be Drive A: and floppy connected after the twist in the floppy wire will be Drive B:

Note: This only works with two floppies installed.

Set keypad numlock status after boot

• On -- Keypad is number keys

• Off -- Keypad is cursors keys

Select gate A20 options

• Normal -- Use keyboard controller to control

A20 gate

• Fast -- Allow chipset to control A20 gate

Limit access with password to the system and setup or just setup

• System -- The system will not boot and access to setup will be denied if the correct password is not entered at the prompt

• Setup -- The system will boot but, access to setup will be denied if the correct password is not entered at the prompt

Note: To disable security, select Password setting at the main menu and then you will be asked to enter a password. Do not type anything, just press <Enter> and it will disable security. Once security is disabled, you can boot and enter setup freely.

Enable reporting that there is no floppy disk drives to Win 95

• Yes -- Report to Win 95 if there are no floppies

• No -- Do not report to Win 95 if there are no floppies

CMM7686GX300-3V

73

Quick Boot

BIOS Features Setup Fields

+, -, <PgUp>,

<PgDn>

Enables or Disables Quick Boot

• Disable

• Enable

Overrides Extended Memory Test Selection and disables Boot Up Numlock Status

Extended Memory

Test

+, -, <PgUp>,

<PgDn>

Enable or Disable Extended Memory Test

• Disable

• Enable

ISA Plug-n-Play

Support

BIOS shadowing

Cyrix 6x86/MII

CPUID

+, -, <PgUp>,

<PgDn>

Enable or Disable ISA Plug-n-Play Support

• Disable

• Enable

+, -, <PgUp>,

<PgDn>

+, -, <PgUp>,

<PgDn>

Enable or disable copying slow ROMs to fast

DRAM for the following memory areas:

• Video BIOS -- C0000 - C7FFFF

• C8000 - CBFFF

• CC000 - CFFFF

• D0000 - D3FFF

• D4000 - D7FFF

• D8000 - DBFFF

• DC000 - DFFFF

Enable or disable the CPUID instruction

• Enable -- Allow the CPUID instruction

• Disable -- Don’t allow the CPUID instruction

74

CMM7686GX300-3V

Chipset Features Setup

The following is a list of Chipset Features Setup fields.

Chipset Features Setup Fields

Recovery time is the length of time, measured in CPU clocks, which the system will delay after the completion of an input/output request. This delay takes place because the CPU is operating so much faster than the I/O bus that the CPU must be delayed to allow for the completion of the I/O.


16-bit I/O recovery (Clocks)

+, -, <PgUp>,

<PgDn>

Set the recovery time for 16-bit I/O cycles. Selection is from 1 to 16 clocks. Default is 5.

8-bit I/O recovery (Clocks)

+, -, <PgUp>,

<PgDn>

Set the recovery time for 8-bit I/O cycles. Selection is from 1 to 16 clocks. Default is 5.

CMM7686GX300-3V

75

Power Management Setup Fields

The following is a list of Power Management Setup fields.

Power Management Setup Fields

Field

Power management

Doze Mode

Standby Mode

Active keys

+, -,

<PgUp>,

<PgDn>

+, -,

<PgUp>,

<PgDn>

+, -,

<PgUp>,

<PgDn>

Selections

Select power management mode

• Disable -- Power management off

• Min Saving -- Minimum power savings, maximum performance

• Max Saving -- Maximum power savings, minimum performance

• User Defined -- User selects the power management functions to suit the application

Select inactivity time delay before entering doze mode

• Disable -- Doze mode off

• 1 -- 1 Second

• 2 -- 2 Seconds

• 4 -- 4 Seconds

• 8 -- 8 Seconds

• 10 -- 10 Seconds

• 12 -- 12 Seconds

• 15 -- 15 Seconds

• 16 -- 16 Seconds

Select inactivity time delay before entering standby mode

• Disable -- Standby mode off

• 1 -- 1 Minute

• 2 -- 2 Minutes

• 4 -- 4 Minutes

• 8 -- 8 Minutes

• 10 -- 10 Minutes

• 12 -- 12 Minutes

• 15 -- 15 Minutes

• 16 -- 16 Minutes

• 20 -- 20 Minutes

• 30 -- 30 Minutes

• 40 -- 40 Minutes

• 60 -- 60 Minutes

76

CMM7686GX300-3V

HDD Power

Down

Modem use

IRQ

Throttle Duty

Cycle

RING POWER

ON Controller

NET POWER

ON Controller

RTC Alarm

Function

RTCOn by

Time(hh:mm)

Soft-Off by

PWR-BTTN


+, -,

<PgUp>,

<PgDn>

+, -,

<PgUp>,

<PgDn>

Select inactivity time delay before hard disk power down

• Disable -- HDD power down off

• 1 -- 1 Minute

• 2 -- 2 Minutes

• 4 -- 4 Minutes

• 8 -- 8 Minutes

• 10 -- 10 Minutes

• 12 -- 12 Minutes

• 15 -- 15 Minutes

• 16 -- 16 Minutes

• 20 -- 20 Minutes

• 30 -- 30 Minutes

• 40 -- 40 Minutes

• 60 -- 60 Minutes

Select IRQ for modem wakeup

• NA -- Not Available

• 3 -- IRQ 3

• 4 -- IRQ 4

• 5 -- IRQ 5

• 7 -- IRQ 7

• 9 -- IRQ 9

• 10 -- IRQ 10

• 11 -- IRQ 11

+, -,

<PgUp>,

<PgDn>

Select throttle duty cycle.

• 12.5 -- 12.5% Minimum savings

• 33.3 -- 33.3%

• 50.0 -- 50.0%

• 75.0 -- 75.0% Maximum savings

+, -,

<PgUp>,

<PgDn>

• Enable

• Disable

• Enable

• Disable

+, -,

<PgUp>,

<PgDn>

+, -,

<PgUp>,

<PgDn> hh:mm

• Enable

• Disable

• hh:mm

+, -,

<PgUp>,

<PgDn>

• Instant-OFF

• Delay 4 Sec

CMM7686GX300-3V

77

IRQ that will bring the CPU out of power management


+, -,

<PgUp>,

<PgDn>

Select IRQs that will wake the CPU out of suspend mode

• IRQ 1

• IRQ 3

• IRQ 4

• IRQ 5

• IRQ 6

• IRQ 7

• IRQ 9

• IRQ 10

• IRQ 11

• IRQ 12

• IRQ 13

• IRQ 14

• IRQ 15

78

CMM7686GX300-3V

PNP/PCI Configuration Setup Fields

The following is a list of PNP/PCI Configuration Setup fields.

PNP/PCI Configuration Setup Fields


PNP OS installed

+, -,

<PgUp>,

<PgDn>

Select if you are using a PNP aware operating system. If you select Yes the Operating System will change the I/O assignments made in the BIOS.

• Yes -- Using a PNP operating system such as

Microsoft Windows 95/98/NT

• No -- Not using a PNP operating system

Resources controlled by

+, -,

<PgUp>,

<PgDn>

How PNP resources are controlled

• Auto -- BIOS configures the PNP devices

• Manual -- User configures PNP devices

Reset Configuration Data

+, -,

<PgUp>,

<PgDn>

IRQ assigned to

PCI IRQ activated by

Used memory base address

+, -,

<PgUp>,

<PgDn>

+, -,

<PgUp>,

<PgDn>

+, -,

<PgUp>,

<PgDn>

Select Enable to clear the Extended System Configuration Data (ESCD) area. This will make the

CPU search for legacy devices and store the updated info. This field will automatically return to disable after the next boot.

Select whether interrupts are to be used by legacy

ISA devices or PCI/PNP ISA devices.

• IRQ 3 -- PCI/ISA PNP or Legacy ISA












Select if PCI interrupts are level or edge sensitive.

Select the starting address of an upper memory region to exclude from PCI/PNP usage:

• NA -- Upper memory not used by legacy ISA devices

• C800h

• CC00h

• D000h

• D400h

• D800h

• DC00h

CMM7686GX300-3V

79

Used memory length

PNP/PCI Configuration Setup Fields

+, -,

<PgUp>,

<PgDn>

Select the length of an upper memory region to exclude from PCI/PNP usage:

• 8 KB

• 16 KB

• 32 KB

• 64 KB

80

CMM7686GX300-3V

Integrated Peripherals Setup Fields

The following is a list of Integrated Peripherals Setup fields.

Integrated Peripherals Setup Fields


IDE block mode

+, -,

<PgUp>,

<PgDn>

Allows the IDE controller to use fast block mode to transfer data to and from the hard disk.

• Enable -- IDE controller uses block mode

• Disable -- IDE controller does not uses block mode

Keyboard input clock

Onboard Serial

Port 1:

Mode

Onboard Serial

Port 2:

Mode


+, -,

<PgUp>,

<PgDn>

+, -,

<PgUp>,

<PgDn>

+, -,

<PgUp>,

<PgDn>

+, -,

<PgUp>,

<PgDn>

+, -,

<PgUp>,

<PgDn>

Select the clock to be used for the keyboard controller

• 8 -- 8 MHz - Default

• 12 -- 12 MHz

• 16 -- 16 MHz

Serial port 1, connector CN7 settings:

• Disable -- Serial port not used

• Auto -- BIOS/OS controls operation

• 3F8h/IRQ 4 -- Address 3F8h and interrupt 4


• 3E8h/IRQ 4 -- Address 3E8h and interrupt 4


Select mode for onboard serial port 1

• RS-232 -- RS-232 driver/receiver enabled

• RS-422/485 -- RS-422/485 driver/receiver enabled

Serial port 2, connector CN8settings:

• Disable -- Serial port not used

• Auto -- BIOS/OS controls operation





Select mode for onboard serial port 2

• RS-232 -- RS-232 driver/receiver enabled

• RS-422/485 -- RS-422/485 driver/receiver enabled

+, -,

<PgUp>,

<PgDn>

Selects parallel port address and interrupt

• Disable -- Parallel port not used

• 378h/ IRQ7 -- Address 378h and interrupt 7

• 278h/ IRQ5 -- Address 278h and interrupt 5

• 3BCh/ IRQ7 -- Address 3BCh and interrupt 7

CMM7686GX300-3V

81

Parallel port mode

ECP mode use

DMA

BIOS extension window device in SSD

Socket

SSD Window

Drive A:

(except BiosExt)

Fail Safe Boot in SSD Win


+, -,

<PgUp>,

<PgDn>

Select the mode for the parallel port

• SPP -- Standard parallel port

• EPP 1.7 -- Extended parallel port compatible with version 1.7

• EPP 1.9 -- Extended parallel port compatible with version 1.9

• ECP -- Extended Capabilities port

• EPP + ECP -- both EPP and ECP mode

+, -,

<PgUp>,

<PgDn>

Select DMA for ECP mode

• 1 -- DMA channel 1

• 3 -- DMA channel 3

+, -,

<PgUp>,

<PgDn>

+, -,

<PgUp>,

<PgDn>

+, -,

<PgUp>,

<PgDn>

+, -,

<PgUp>,

<PgDn>

Select a 32 KB memory window for BIOS extension devices in the 32-pin SSD socket such as DiskOnChip®

• Disable -- Do not use BIOS extension device

• C800 -- Window at C8000h - CFFFFh

• D000 -- Window at D0000h - D7FFFh

• D800 -- Window at D8000h - DFFFFh

Select a SSD device to fill the SSD socket

• None

• RAM-128k

• RAM-512k

• NOVRAM-128k

• NOVRAM-512k

• ATMEL-128k

• ATMEL-512k

• FLASH-128k

• FLASH-256k

• FLASH-512k

• EPROM-128k

• EPROM-256k

• EPROM-512k

• EPROM-1M

• BiosExt

Sets the memory window to be used for the SSD device

• D000:0000

• D800:0000

• C800:0000

Selects the device the CPU will consider to be A:

•

•

Floppy

SSD

+, -,

<PgUp>,

<PgDn>

Enables the non-volitile, onboard backup BIOS

• Enable

• Disable

82

CMM7686GX300-3V

Select Active

Video

Video memory size


+, -,

<PgUp>,

<PgDn>

Allows multiple monitors to be run from the CPU

• Onboard First

• PCI First

• Integrated

• No Onboard

+, -,

<PgUp>,

<PgDn>

Select the amount of DRAM to allocate to video memory

• 1.5 -- 1.5 MB video memory



CMM7686GX300-3V

83

84

CMM7686GX300-3V

C

HAPTER

5: U

SING THE CPU

M

ODULE

This chapter provides information for users who wish to develop their own applications programs for the cpuModule.

This chapter includes information on the following topics:

• Memory map

• I/O Address map

• Interrupts

• Power On Self Tests (POSTs)

• System Functions (Watchdog Timer, Real Time Clock)

• Storing Applications in Solid State Disk

• Utility Programs

CMM7686GX300-3V

85

Memory Map

The ISA portion of the cpuModule addresses memory using 24 address lines. This allows a maximum of 2

24 locations, or 16 Megabytes of memory.

The table below shows how memory in the first megabyte is allocated in the system.

FFFFFH-

C0000H

ROM

EFFFFH-

C0000H

BFFFFH-

A0000H

First Megabyte Memory Map

256 KB BIOS in Flash EPROM, shadowed into DRAM during runtime.

Run time user memory space. Usually, memory between

C0000H and C7FFFH is used for the BIOS of add-on VGA video cards.

Normally used for video RAM as follows:

EGA/VGA

Monochrome

CGA

0A0000H to 0AFFFFH

0B0000H to 0B7FFFH

0B8000H to 0BFFFFH

DOS reserved memory area

9FFFFH-

00502H

00501H-

00400H

003FFH-

00000H

BIOS data area

Interrupt vector area

Memory beyond the first megabyte can be accessed in real mode, by using EMS or a similar memory manager. See your OS or programming language references for information on memory managers.

86

CMM7686GX300-3V

Input/Output Address Map

As with all standard PC/104 boards, the Input/Output (I/O) space is addressed by 10 address lines

(SA0-SA9). This allows 2

10 or 1024 distinct I/O addresses. Any add-on modules you install must therefore use I/O addresses in the range 0-1023 (decimal) or 000-3FF (hex).

If you add any PC/104 modules or other peripherals to the system you must ensure they do not use reserved addresses listed below, or malfunctions will occur. The exception to this is if the resource has been released by the user.

The table below lists I/O addresses reserved for the cpuModule.

I/O Addresses Reserved for the cpuModule

Address Range Bytes Device

000H-00FH 16 DMA Controller

010H-01FH

020H-021H

022H-02FH

040H-043H

16

2

13

4

Reserved for CPU

Interrupt Controller #1

Reserved

Timer

060H-064H

070H-071H

080H-08FH

0A0H-0A1H

0C0H-0DFH

0F0H-0FFH

100H-101H

1F0H-1FFH

200H-201H

238H-23BH

5

2

16

2

32

16

2

16

2

4

Keyboard Interface

Real Time Clock port

DMA page register

Interrupt controller #2

DMA controller #2

Math co-processor

Video Initialization

Hard disk

1

Reserved

Bus Mouse

4

2E8H-2EFH 8

2F8H-2FFH

378H-37FH

3BCH-3BFH

8

8

4

Serial Port

2

Serial port

2

Parallel port

3

Parallel port

3

87

CMM7686GX300-3V

3E8H-3EFH

3F0H-3F7H

3F8H-3FFH

8

8

8

Serial port

2

Floppy disk

1

Serial port

2

1

If a floppy or IDE controller is not connected to the system, the I/O addresses listed will not be occupied.

2

Only one of the I/O addresses shown for a Serial port is active at any time. You can use Setup to select which one is active or to disable it entirely.

3

Only one of the I/O addresses shown for the Parallel printer port is active at any time. You can use

Setup to select which one is active or to disable it entirely.

4

If a PS2 mouse is not connected to the system, the I/O addresses listed will not be occupied.

88

CMM7686GX300-3V

Hardware Interrupts

If you add any PC/104 modules or other peripherals to the system you must ensure they do not use interrupts needed by the cpuModule, or malfunctions will occur

The cpuModule supports the standard PC interrupts listed below. Interrupts not in use by hardware on the cpuModule itself are listed as 'available'.

5

6

3

4

Interrupt

Hardware Interrupts Used on the cpuModule

Normal Use Source

0

1

2

Timer 0

Keyboard

Cascade of IRQ 8-15

On-board ISA device

On-board ISA device

On-board ISA device

7

8

9

COM2

COM1 available

Floppy

1

Printer

Real Time Clock available, routed to IRQ

2

On-board ISA device

On-board ISA device

XT bus

XT bus

On-board ISA device

On-board ISA device

XT bus

10

11

12

14

15 available available

Bus mouse primary IDE hard disk

2 available sometimes used as secondary IDE hard disk

AT bus

AT bus

On-board ISA device

AT bus

AT bus

1

Floppy disk interrupt, INT6, is available for use if no floppy disk is present in the system and floppy disk is disabled in Setup.

2

Hard disk interrupt, INT14, is available for use if no hard disk drive is present in the system and hard disk is disabled in Setup.

89

CMM7686GX300-3V

The RTD Enhanced Award BIOS

The RTD Enhanced Award BIOS (Basic Input/Output System) is software that interfaces hardwarespecific features of the cpuModule to an operating system (OS). Physically, the BIOS software is stored in a Flash EPROM on the cpuModule. Functions of the BIOS are divided into two parts:

The first part of the BIOS is known as POST (Power-On Self-Test) software, and it is active from the time power is applied until an OS boots (begins execution). POST software performs a series of hardware tests, sets up the machine as defined in Setup, and begins the boot of the OS;

The second part of the BIOS is known as the CORE BIOS. It is the normal interface between cpu-

Module hardware and the operating system which is in control. It is active from the time the OS boots until the cpuModule is turned off. The CORE BIOS provides the system with a series of software interrupts to control various hardware devices.

The following sections discuss the sections of the BIOS in more detail and describe features of the

BIOS which may be useful to you in developing applications.

90

CMM7686GX300-3V

Power On Self Tests (POSTs)

POST Messages

During the Power On Self Test (POST), if the BIOS detects an error requiring you to do something to fix, it will either sound a beep code or display a message.

If a message is displayed, it will be accompanied by:

PRESS F1 TO CONTINUE, CTRL-ALT-ESC OR DEL TO ENTER SETUP

POST Beep

Currently there are two kinds of beep codes in BIOS. This code indicates that a video error has occurred and the BIOS cannot initialize the video screen to display any additional information. This beep code consists of a single long beep followed by three short beeps. The other code indicates that your DRAM error has occurred. This beep code consists of a single long beep repeatedly.

Error Messages

One or more of the following messages may be displayed if the BIOS detects an error during the

POST. This list includes messages for both the ISA and the EISA BIOS.

CMOS BATTERY HAS FAILED

CMOS battery is no longer functional. It should be replaced.

CMOS CHECKSUM ERROR

Checksum of CMOS is incorrect. This can indicate that CMOS has become corrupt. This error may have been caused by a weak battery. Check the battery and replace if necessary.

DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER

No boot device was found. This could mean that either a boot drive was not detected or the drive does not contain proper system boot files. Insert a system disk into Drive A: and press <Enter>. If you assumed the system would boot from the hard drive, make sure the controller is inserted correctly and all cables are properly attached. Also be sure the disk is formatted as a boot device. Then reboot the system.

DISKETTE DRIVES OR TYPES MISMATCH ERROR - RUN SETUP

Type of diskette drive installed in the system is different from the CMOS definition. Run Setup to reconfigure the drive type correctly.

DISPLAY SWITCH IS SET INCORRECTLY

The display switch, on the motherboard, can be set to either monochrome or color. This indicates the switch is set to a different setting than indicated in Setup. Determine which setting is correct, and then either turn off the system and change the jumper, or enter Setup and change the VIDEO selection.

DISPLAY TYPE HAS CHANGED SINCE LAST BOOT

Since last powering off the system, the display adapter has been changed. You must configure the system for the new display type.

EISA Configuration Checksum Error

ERROR ENCOUNTERED INITIALIZING HARD DRIVE

Hard drive cannot be initialized. Be sure the adapter is installed correctly and all cables are correctly and firmly attached. Also be sure the correct hard drive type is selected in Setup.

ERROR INITIALIZING HARD DISK CONTROLLER

91

CMM7686GX300-3V

Cannot initialize controller. Make sure the cord is correctly and firmly installed in the bus. Be sure the correct hard drive type is selected in Setup. Also check to see if any jumper needs to be set correctly on the hard drive.

FLOPPY DISK CNTRLR ERROR OR NO CNTRLR PRESENT

Cannot find or initialize the floppy drive controller. Make sure the controller is installed correctly and firmly. If there are no floppy drives installed, be sure the Diskette Drive selection in Setup is set to NONE.

KEYBOARD ERROR OR NO KEYBOARD PRESENT

Cannot initialize the keyboard. Make sure the keyboard is attached correctly and no keys are being pressed during the boot.

If you are purposely configuring the system without a keyboard, set the error halt condition in Setup to HALT ON ALL, BUT KEYBOARD. This will cause the BIOS to ignore the missing keyboard and continue the boot.

Memory Address Error at...

Indicates a memory address error at a specific location. You can use this location along with the memory map for your system to find and replace the bad memory chips.

Memory parity Error at...

Indicates a memory parity error at a specific location. You can use this location along with the memory map for your system to find and replace the bad memory chips.

MEMORY SIZE HAS CHANGED SINCE LAST BOOT

Memory has been added or removed since the last boot. In EISA mode use Configuration Utility to reconfigure the memory configuration. In ISA mode enter Setup and enter the new memory size in the memory fields.

Memory Verify Error at...

Indicates an error verifying a value already written to memory. Use the location along with your system's memory map to locate the bad chip.

OFFENDING ADDRESS NOT FOUND

This message is used in conjunction with the I/O CHANNEL CHECK and RAM PARITY ERROR messages when the segment that has caused the problem cannot be isolated.

OFFENDING SEGMENT:

This message is used in conjunction with the I/O CHANNEL CHECK and RAM PARITY ERROR messages when the segment that has caused the problem has been isolated.

PRESS A KEY TO REBOOT

This will be displayed at the bottom screen when an error occurs that requires you to reboot. Press any key and the system will reboot.

PRESS F1 TO DISABLE NMI, F2 TO REBOOT

When BIOS detects a Non-maskable Interrupt condition during boot, this will allow you to disable the NMI and continue to boot, or you can reboot the system with the NMI enabled.

RAM PARITY ERROR - CHECKING FOR SEGMENT...

Indicates a parity error in Random Access Memory.

SYSTEM HALTED, (CTRL-ALT-DEL) TO REBOOT...

Indicates the present boot attempt has been aborted and the system must be rebooted. Press and hold down the CTRL and ALT keys and press DEL.

92

CMM7686GX300-3V

FLOPPY DISK(S) fail (80) Æ Unable to reset floppy subsystem.

FLOPPY DISK(S) fail (40) Æ Floppy Type mismatch.

Hard Disk(s) fail (80)


Æ HDD reset failed

Æ HDD controller diagnostics failed.




Æ HDD initialization error.

Æ Unable to calibrate fixed disk.

Æ Sector Verify failed.

Keyboard error or no keyboard present.

Cannot initialize the keyboard. Make sure the keyboard is attached correctly and no keys are being pressed during the boot.

Manufacturing POST loop.

BIOS ROM checksum error - System halted.

The checksum of ROM address F0000H-FFFFFH is bad.

Memory test fail.

BIOS reports the memory test fail if the onboard memory is tested error.

RTD Enhanced Award BIOS POST Codes

06

07

09

POST (hex)

01

02

03

04

05

Description

Clear base memory 0~640K

Reserved

Initialize EISA registers (EISA BIOS only)

Reserved

1. Keyboard Controller Self-Test

2. Enable Keyboard Interface

Reserved

Verifies CMOS's basic R/W functionality

1. Program the configuration register of Cyrix CPU according to the MODBINable

Cyrix Register Table

2. OEM specific cache initialization (if needed)

93

CMM7686GX300-3V

19

30

31

14

15

16

17

0F

10

11

12-13


0A

0B

0C

0D

0E

32

41

42

1. Initialize the first 32 interrupt vectors with corresponding Interrupt handlers Initialize

INT no from 33-120 with Dummy(Spurious) Interrupt Handler

2. Issue CPUID instruction to identify CPU type

3. Early Power Management initialization (OEM specific)

1. Verify the RTC time is valid or not

2. Detect bad battery

3. Read CMOS data into BIOS stack area

4. PnP initialization including (PnP BIOS only)

-Assign CSN to PnP ISA card

-Create resource map from ESCD

5. Assign IO & Memory for PCI devices (PCI BIOS only)

Initialization of the BIOS Data Area (40: 00 - 40:FF)

1. Program some of the Chipset's value according to Setup. (Early Setup Value Program)

2. Measure CPU speed for display & decide the system clock speed

3. Video initialization including Monochrome, CGA, EGA/VGA. If no display device found, the speaker will beep which consists of one single long beep followed by two short beeps.

1. Initialize the APIC (Multi-Processor BIOS only)

2. Test video RAM (If Monochrome display device found)

3. Show messages including:-Award Logo, Copyright string, BIOS Date code & Part

No.

-OEM specific sign on messages

-Energy Star Logo (Green BIOS ONLY)-CPU brand, type & speed

-Test system BIOS checksum (Non-Compress Version only)

DMA channel 0 test

DMA channel 1 test

DMA page registers test

Reserved

Test 8254 Timer 0 Counter 2.

Test 8259 interrupt mask bits for channel 1

Test 8259 interrupt mask bits for channel 2

Reserved

Test 8259 functionality

Detect Base Memory & Extended Memory Size

1. Test Base Memory from 256K to 640K

2. Test Extended Memory from 1M to the top of memory

1. Display the Award Plug & Play BIOS Extension message (PnP BIOS only)

2. Program all onboard super I/O chips (if any) including COM ports, LPT ports, FDD port according to setup value

Initialize floppy disk drive controller

Initialize Hard drive controller

94

CMM7686GX300-3V

60

1A-1D

1E

1F-29

33-3B

3C

3D


43

44

45

50

51

52

53

3E

41H

46-4D

4E

4F

BE

If it is a PnP BIOS, initialize serial & parallel ports

Reserved

Initialize math coprocessor.

Write all CMOS values currently in the BIOS stack area back into the CMOS

Reserved

1. Initialize all ISA ROMs

2. Later PCI initialization (PCI BIOS only)-assign IRQ to PCI devices-initialize all PCI

ROMs

3. PnP Initialization (PnP BIOS only)

-assign IO, Memory, IRQ & DMA to PnP ISA devices

-initialize all PnP ISA ROMs

4. Program shadows RAM according to Setup settings

5. Program parity according to Setup setting

6. Power Management Initialization-Enable/Disable global PM-APM interface initialization

1. If it is NOT a PnP BIOS, initialize serial & parallel ports

2. Initialize time value in BIOS data area by translate the RTC time value into a timer tick value

Setup Virus Protection (Boot Sector Protection) functionality according to Setup setting

Reserved

If EISA NVM checksum is good, execute EISA initialization (EISA BIOS only)

Reserved

Reserved

Set flag to allow users to enter CMOS Setup Utility

1. Initialize Keyboard

2. Install PS2 mouse

Try to turn on Level 2 cache

Note: Some chipset may need to turn on the L2 cache in this stage. But usually, the cache is turn on later in POST 61h

Enable FDD and detect media type

Reserved

If there is any error detected (such as video, kb...), show all the error messages on the screen & wait for user to press <F1> key

1. If password is needed, ask for password

2. Clear the Energy Star Logo (Green BIOS only)

Program defaults values into chipset according to the MODBINable Chipset Default Table

95

CMM7686GX300-3V


BF

C0

C1

C3

C5

FFH

1. Program the rest of the Chipset's value according to Setup. (Later Setup Value Program)

2. If auto-configuration is enabled, programmed the chipset with pre-defined values in the MODBINable Auto-Table

1. Turn off OEM specific cache, shadow...

2. Initialize all the standard devices with default values standard devices includes:

-DMA controller (8237)

-Programmable Interrupt Controller (8259)

-Programmable Interval Timer (8254)

-RTC chip

Auto-detection of onboard DRAM & Cache

1. Test system BIOS checksum

2. Test the first 256K DRAM

3. Expand the compressed codes into temporary DRAM area including the compressed

System BIOS & Option ROMs

Copy the BIOS from ROM into E0000-FFFFF shadow RAM so that POST will go faster

System Booting INT 19

96

CMM7686GX300-3V


In addition to the Setup configuration stored on the board, the cpuModule has a permanent default configuration. The system will resort to using this default if an error occurs when accessing the

EPROM which holds the Setup on the module.


CMM7686GX300-3V

Function





Auto detect

Auto detect



Boot device

BIOS Extension

Auto detect

Auto detect


Disabled

Floppy Drive 1

Floppy Drive 2

Serial port 1

Serial port 2

Parallel Port

Keyboard

Video Resolution

Fail safe boot rom


RS232 at 3F8H

RS232 at 2F8H

LPT1 at 378H


High

Enabled

Select Active Video

Power Management

PNP OS Installed



IDE HDD Block Mode

KBC Input Clock

SSD Window


Parallel Port Mode

Halt On

Virus Warning

CPU Internal Cache


Swap Floppy Drive


Gate A20 Option

Security Option

Report No FDD for

WIN95

Quick Boot


Disabled

Disabled

Integrated

Disabled

No

Auto

Level

Enabled

8 Mhz

D800:0000

378/IRQ7

SPP

No Errors

Disabled

Enabled

Enabled

Disabled

Off

Fast

Setup

Yes

97

98

CMM7686GX300-3V


Video Bios Shadow

C8000-DFFFF

16-bit I/O Recovery

(Clock)


Enabled

Enabled

Disabled

5

5

Bypassing the Stored Configuration

Under certain circumstances, you may want to bypass the configuration stored on the board. To do this press the {Del} key to enter Setup and then you can then reconfigure the cpuModule correctly.

CMM7686GX300-3V

99

Direct Hardware Control

Some of the cpuModule hardware is controlled directly without using BIOS routines. These include:

• Watchdog Timer

• Real Time Clock Control

• Parallel Port Control

The following sections describe use of these features.

100

CMM7686GX300-3V

Watchdog Timer Control

The cpuModule includes a Watchdog Timer, which provides protection against programs "hanging", or getting stuck in an execution loop where they cannot respond correctly. When enabled, the

Watchdog Timer must be periodically reset by your application program. If it is not reset before the time-out period of 1.2 seconds expires, it will cause a hardware reset of the cpuModule.

Three functions have been implemented on the cpuModule for Watchdog Timer control. These are:

• Watchdog Timer enable

• Watchdog Timer disable

• Watchdog Timer reset

To enable the watchdog timer you must write a 1 to to Bit 0 of I/O register 1Eh. To ensure compatability with future designs, you should read the register and only change the bit you need to change.

After you enable the watchdog timer, you must reset it at least once every 1.2 seconds by reading I/

O 1Eh. The data read does not matter.

To disable the watchdog timer you must write a 0 to to Bit 0 of I/O register 1Eh.

Enabling the watchdog timer is illustrated in the following QuickBasic program fragment: temp = INP(&H1E) temp = temp OR 1

OUTPUT &H1E, temp

’Read I/O port 1Eh

’Set LSB to 1

’Enable WDT

When the watchdog timer is enabled it must be refreshed before it times out or it hardware reset the system. Refreshing the watchdog timer is illustrated in the following QuickBasic program fragment: temp = INP(&H1E) ’Read I/O port 1Eh to refresh the WDT

Disabling the watchdog timer is illustrated in the following QuickBasic program fragment: temp = INP(&H1E) temp = temp AND &HFE

OUTPUT &H1E, temp

’Read I/O port 1Eh

’Clear LSB to 0

’Disable WDT

101

CMM7686GX300-3V

Real Time Clock Control

The cpuModule is equipped with a Real Time Clock (RTC) which provides system date and time functions, and also provides 128 non-volatile memory locations. The contents of these memory locations are retained whenever an external backup battery is connected, whether or not system power is connected.

You may access the RTC date, time, and memory using an index and data register at I/O addresses

70h and 71h. Address 70h is the Index register. It must be written with the number of the register to read or write. Refer to the map below for valid choices for the index. Data is then written to or read from the selected register by writing or reading (respectively) the data register at address 71h.

Do not change values stored in the RTC registers listed as

RESERVED in the table below. Doing so will interfere with proper cpuModule operation.

Registers of the Real Time Clock are shown below:.

Registers

(hex)

00h

02h

04h

06h

07h

08h

09h

0A-31h

32h

33-3Fh

40-7Fh

Registers

(decimal)

Real Time Clock Registers

Number of

Bytes

0 1

Function

BCD Seconds

8

9

10-49

50

6

7

2

4

51-63

64-127

1

1

1

1

1

1

40

1

13

64

BCD Minutes

BCD Hours

Day of week

Day of month

Month

Year

RESERVED- Do not modify!

BCD Century

RESERVED - Do not modify!

User RAM

RTC access is illustrated in the following QuickBasic program fragment:

Reference APP note ANC114 at http://www.rtd.com/appnote/ANC114.pdf

102

CMM7686GX300-3V

Parallel Port Control

The parallel port may be operated in SPP (output-only), EPP (bi-directional), and ECP (extended capabilities) modes. The mode may be selected in Setup, or by application software.

CMM7686GX300-3V

103

Processor Clock Control

The processor clock is controller by solder jumpers on the board. These are set at the factory and should not be adjusted.

Please see Power Consumption for a listing of Power Consumption.

104

CMM7686GX300-3V

Storing Applications On-board

The cpuModule was designed to be used in embedded computing applications. In these applications, magnetic media like hard disks and floppy disks are not very desirable. It is better to eliminate magnetic storage devices and place your operating system and application software into the cpuModule's

Solid State Disk (SSD).

The following section describes two distinctly different ways you may use the Solid State Disk sockets of the cpuModule. These methods allows you to use a wide variety of memory devices to implement on-board Solid State Disk storage, each with its advantages and disadvantages.

CMM7686GX300-3V

105

Ways to Use the Solid State Disk Socket

The ways to utilize the Solid State Disk socket of the cpuModule.

• Using a device which installs as a BIOS Extension

• Using Conventional SSD Memory

BIOS Extension Devices such as DiskOnChip® and PromDisk provide a relatively large amount of read/write disk space. These devices generally appear similar to a conventional hard disk to DOS, allowing you to copy, delete, and rename files without using any special utilities.

Conventional Solid State Disk can use a variety of memory devices, such as:

• Atmel 5 volt only Flash

• Intel 12 volt Flash

• AMD 5-volt Flash

• Static RAM

• NOVRAM

• EPROM to create a Solid State Disk. When used with Atmel 5 volt Flash, SRAM, or NOVRAM, the SSD appears similar to a read/write floppy disk to DOS, allowing you to copy, delete, and rename files in the SSD without using any special utilities.

When used with other Flash or EPROM, you can create file to program the device with the RIMAGE program.

These methods are described in detail in the following sections.

106

CMM7686GX300-3V

CMM7686GX300-3V

107

Using BIOS Extension Devices

You can use BIOS Extension Devices like M-Systems DiskOnChip® and MCSI PromDisk to implement a Solid State Disk which can be read and written using normal disk commands.

Advantages of using these devices include:

• Storage capacity up to 1 GB per socket (more in the future)

• Full read/write capability using standard OS file commands

• Integrated support for other operating systems is possible

(contact M-Systems for information)

Parts supported by the cpuModule include:

• M-Systems 2000 series: MD2203-D1024 (1 GB) down to...16 MB

• Optional alternate operating system versions of the above parts

• MCSI PromDisk: 72300 (4MB)

• MCSI PromDisk: 72301 (8MB)

Our website at www.rtd.com provides links to the websites of these manufacturers.

Installing BIOS Extension Devices

To install these devices, follow this procedure:

• Apply power to the cpuModule and run Setup.

• Set A BIOS Extension Window on the advanced setup page. .

NOTE!

The memory window selected for a BIOS extension device must not be used by any other program or hardware device. Make sure this window is not used by EMM386 or another memory manager, Ethernet card,

PCMCIA card, etc.

• Save your changes and exit Setup.

• Turn off the cpuModule.

• Install the BIOS Extension Device into the socket.

• Reboot the cpuModule. The BIOS Extension Device should appear as the next available hard drive in your system. If there is no other hard drive installed, it will appear as drive

C:.

• Format the new drive using the DOS format command.

NOTE!

If you wish to make the drive bootable, you must format it using the /s switch of the format command. Refer to your OS manual for more information.

• If you wish to boot from the BIOS Extension Device, run Setup and disable any other hard drive. Set the boot device to Hard Drive. The cpuModule will not boot to a BIOS Extension Device if another hard drive is enabled.

108

CMM7686GX300-3V

Using Conventional Solid State Devices

You can use numerous memory types to implement a Conventional Solid State Disk. Depending on the devices used, you may implement read/write, read-only, or write-once-read-many type drives.

Advantages of using the Conventional SSD include:

• Storage capacity up to 1 MB (EPROM only)

• Atmel Flash and NovRAM allow read/write capability using standard DOS file commands

Disadvantages of using the Conventional SSD include:

• Requires external utility program and device programmer to program 12 volt Flash, AMD

5-volt Flash, or EPROM.

• Limited memory size.

The following memory devices or their equivalents may be used for a Conventional SSD. Access times for all devices must be 150 ns or less, and all devices must be in 32-pin DIP packages.

• Atmel 29C010A, 29C020A or 29C040A

• +12 V Flash 28F010, 28F020

• +5 V Flash 29F010, 29F040

• SRAM 128Kx8, 512Kx8

• NOVRAM (Dallas Semiconductor DS1645Y, DS1650Y)

• EPROM (27C010, 27C020, 27C040, 27C080)

Installing a Conventional SSD using Atmel 5-volt-only Flash

To install an SSD using Atmel Flash, follow this procedure:


• Set SSD socket 1 to the appropriate Atmel device type.

• Set SSD Window to a value which will not conflict with other hardware or software.

NOTE!

The memory window selected for DOC must not be used by any other program or hardware device. Make sure this window is not in use by

EMM386 or another memory manager, or an Ethernet card, PCMCIA card, etc.



• Install the memory device into the socket.

• Reboot the cpuModule. The SSD should appear as the next available drive in your system.

• Format the SSD using the DOS format command.

NOTE!

If you wish to make the SSD bootable, you must format it using the /s switch of the format command. Refer to your DOS manual for more information on format.

When using the MS-DOS format command, always specify a size parameter. Use a size larger than the installed SSD, e.g.

format /f:1.44M (for 2 x 512K Atmel Flash devices)

• If you wish to boot from the SSD make it diskette A.

109

CMM7686GX300-3V

Installing a Conventional SSD using SRAM or NOVRAM

When the Solid State Disk is composed of SRAM or NOVRAM, it appears as a read/write disk and may be read and written using normal DOS disk commands.

To install an SRAM or NOVRAM SSD, you should follow this procedure:


• Set SSD socket 1 or 2 to the appropriate SRAM or NOVRAM device type.


NOTE!





• Install the memory device into the cpuModule socket.

• Reboot the cpuModule. The SSD should appear as the next available drive in your system.

• Format the SSD using the DOS format command.

If you wish to make the SSD bootable, you must format it using the /s switch of the format command.

Refer to your DOS manual for more information on the format command.

If you wish to boot from the SSD make it diskette A.

Notes on Formatting an SRAM or NOVRAM SSD

For most purposes, you can format the SRAM or NOVRAM SSD as you would a 1.44MB floppy, using a command line similar to: for example format b: /u

To get the most possible space in the disk and ensure proper operation, use the format command with a size parameter just over the total size of the installed SSD memory. For example, if you install 256

Kbytes of SRAM, you should use format with the parameters for a 360 Kbyte floppy disk. For example:

ROM-DOS™:format b: /u /n:9 /t:40

MS-DOS:format b: /f:360K

See your DOS manual for details on the format command and its parameters.

Installing a Conventional SSD using EPROM or Flash other than Atmel

EPROMs or Flash EPROMs for an SSD must be programmed externally to the cpuModule, using an EPROM programmer and following the procedure below.

To install an EPROM SSD, you should follow this procedure:

110

CMM7686GX300-3V


• Set SSD socket 1 or 2 to the appropriate EPROM or Flash type.


NOTE!




• Boot the cpuModule.

After booting, the Solid State Disk will be seen by the system as a write-protected floppy. DOS commands normally used to read floppy disks will work with the SSD.

Directly Accessing the Solid State Disk

If you wish to directly access the Solid State Disk of the cpuModule contact the factory for additional information on doing so.

CMM7686GX300-3V

111

112

CMM7686GX300-3V

C

HAPTER

6: H

ARDWARE

R

EFERENCE

This appendix gives information on the cpuModule hardware, including:

• jumper settings and locations

• solder jumper settings and locations

• mechanical dimensions

• processor thermal management

CMM7686GX300-3V

113

Jumpers

Many cpuModule options are configured by positioning jumpers. Jumpers are labeled on the board as “JP” followed by a number.

Some jumpers are two-pin, allowing two settings:

• pins 1 and 2 connected (indicated as "closed")

• pins 1 and 2 un-connected (indicated as "open")

1 2

CMM7686GX300-3V

114

CMM7686GX300-3V

.

CMM7686GX300-3V

115

Jumpers and Default Jumper Settings

JP1

JP2

JP4

JP5

JP6

BL1

BL3

2-pin jumper

Used to enable/disable 120 ohm termination resistor on first serial port for

RS-422/485 mode.

default: Open (no termination)

2-pin jumper

Used to enable/disable 120 ohm termination resistor on first serial port for

RS-422/485 mode.

default: Open (no termination)

3-pin jumper

Used to select power for an SSD socket.

1 to 2 is 5 Volts on board.

2 to 3 is 5 volts on board when power on and battery backup when power off default: Positions 1 and 2.

2-pin jumper

Used for restoring factory default settings default: Open

2-pin jumper

Factory use only; do not close.

default: Open

3 position solder blob.

default: 1 and 2 shorted

3 position solder blob.

default: 1 and 2 shorted

116

CMM7686GX300-3V

Solder Jumpers

Solder jumpers are set at the factory and are rarely changed. Solder jumpers are located on the module’s solder side and component side

.

..

.

CMM7686GX300-3V

117

Mechanical Dimensions

The following figure shows mechanical dimensions of the module (in inches)

.

CMM7686GX300-3V Mechanical Dimensions (+/- 0.005")

118

CMM7686GX300-3V

686GX Processor Thermal Management

The industrial grade processor IC of the cpuModule must receive adequate cooling to ensure proper operation and good reliability. The case temperature of the processor must not exceed +85°C The processor is therefore supplied with an attached fan or heatsink with a thermal resistance of 5° C/W.

NOTE!

This cpuModule is not warranted against damage caused by overheating due to improper or insufficient heatsinking or airflow.

The table below shows the maximum ambient temperature allowed vs.

θ

CA

.

CMM7686GX300-3V

300 MHz 17 16 15 13 12

CMM7686GX300-3V

119

120

CMM7686GX300-3V

C

HAPTER

7: T

ROUBLESHOOTING

Many problems you may encounter with operation of your cpuModule are due to common errors. This chapter will help you get your system operating properly.

It contains:

• Common problems and solutions

• Troubleshooting a PC/104 system

• How to obtain technical support

• How to return a product

CMM7686GX300-3V

121

Common Problems and Solutions

The following table lists some of the common problems you may encounter while using your cpu-

Module, and suggests possible solutions.

If you are having problems with your cpuModule, please review this table before contacting technical support.

Problem Cause Solution cpuModule "will not boot" will not boot from particular drive or device

Atmel Flash shows disk space available, but it cannot be written no power or wrong polarity incorrect Setup

(video disabled, etc.) defective or mis-connected device on bus cable connected backwards

SSD installed backwards device not bootable device not formatted power not connected to boot drive part smaller than 1.44MB was formatted as 1.44MB; it will show space available even when full check for correct power on PC/104 bus connectors reboot and press {Del} key to run Setup check for misaligned bus connectors; remove other cards from stack verify all cables are connected correctly check for an SSD memory installed in socket backwards use sys command on drive or re-format the device using the /s switch format drive using /s switch connect power cable to floppy or hard drive ignore "disk space remaining" messages from DOS

REMEMBER! A bootable disk contains 3 hidden files plus format info, totalling about 150kB disable other hard drive(s) in system will not boot from DiskOn-

Chip®

DiskOnChip® is not the only hard drive in system using wrong DiskOnChip® device (not 32 pin)

Boot device not set to Hard disk change to correct (32 pin) DiskOnChip® run Setup and set boot device to Hard

Drive

122

CMM7686GX300-3V

erratic operation excessive bus loading power supply noise power supply limiting temperature too high memory address conflict

I/O address conflict reduce number of PC/104 modules in stack; remove termination components from bus signals; remove any power supply bus terminations examine power supply output with oscilloscope; glitches below 4.75Vdc will trigger a reset; add bypass caps examine power supply output with oscilloscope; check for voltage drop below 4.75V

when hard drive or floppy drive starts; add bypass caps add fan, processor heatsink, or other cooling device(s)

See 686GX ProcessorThermal Manage-

ment.

check for two hardware devices (e.g.

Ethernet, SSD, Arcnet, PCMCIA) trying to use the same memory address check for two software devices (e.g.

EMM386, PCMCIA drivers, etc.) trying to use the same memory addresses check for hardware and software devices trying to use the same memory address check for an address range shadowed (see

Advanced Setup screen) while in use by another hardware or software device check for another module trying to use I/O addresses reserved for the cpuModule between 010h and 01Fh check for two modules (e.g. dataModules,

PCMCIA cards, Ethernet) trying to use the same I/O addresses check if keyboard LEDs light keyboard does not work

Windows 3.1x installation program hangs keyboard interface damaged by misconnection wrong keyboard type smartdrive enabled floppy drive light always on cable misconnected verify keyboard is an 'AT' type or switch to

'AT' mode remove smartdrive command from config.sys, reboot, run install program check for floppy drive cable connected backwards

123

CMM7686GX300-3V

two hard drives will not work, but one does floppy does not work will not boot when video card is removed won't boot from PCMCIA hard drive

COM port will not work in

RS422 or RS485 modes

COM port will not transmit in RS422 or RS485 mode date and time not saved when power is off cannot enter bios

Bad video in Windows after loading GEODE video

Drivers both drives configured for master

"data error" due to drive upside down set one drive for master and the other for slave operation (consult drive documentation) orient drive properly (upright or on its side) illegal calls to video controller look for software trying to access non-existent video controller for video, sound, or beep commands booting from PCMCIA is not supported boot from SSD, use autoexec.bat to load

PCMCIA drivers, run application from

PCMCIA card not configured for RS422/485 correctly configure serial port in Setup program not enabling transmitters control RTS* bit of Modem Control Register to enable transmitters; see Serial Port descriptions no backup battery connect a backup battery to the Multifunction connector quick boot enabled with no hard drives install JP5, reboot, and run qboot.exe and reboot.

Video memory setting too low go into the Bios setup and set video memory to 4.0 MB

124

CMM7686GX300-3V

Troubleshooting a PC/104 System

If you have reviewed the preceding table and still cannot isolate the problem with your cpuModule, please try the following troubleshooting steps. Even if the resulting information does not help you find the problem, it will be very helpful if you contact technical support.

Simplify the system. Remove items one at a time and see if one particular item seems to cause the problem.

Swap components. Try replacing items in the system one-at-a-time with similar items.

CMM7686GX300-3V

125

How to Obtain Technical Support

If after following the above steps, you still cannot resolve a problem with your cpuModule, please assemble the following information:

• cpuModule model, BIOS version, and serial number

• list of all boards in system

• list of settings from cpuModule Setup program

• printout of autoexec.bat and config.sys files (if applicable)

• description of problem

• circumstances under which problem occurs

Then contact factory technical support:

Phone:

Fax:

E-mail:

814 234-8087

814 234-5218 [email protected]

126

CMM7686GX300-3V

How to Return a Product

NOTE!

You must have authorization from the factory in the form of an RMA# before returning any item for any reason!

If you wish to return a product to the factory for service, please follow this procedure:

1) Read the Limited Warranty to familiarize yourself with our warranty policy.

2)

3)

4)

Contact the factory for a Return Merchandise Authorization (RMA) number.

Write a detailed description of the situation or problem.

Include as much information as possible!

List the name of a contact person, familiar with technical details of the problem or situation, along with their phone and fax numbers, address, and e-mail

address (if available).

5)

6)

List your shipping address!!

Indicate the shipping method you would like used to return the product to you.

We will not ship by next-day service without your pre-approval.

Carefully package the product, using proper anti-static packaging. 7)

8)

9)

Write the RMA number in large (1") letters on the outside of the package.

Return the package to:




USA

127

CMM7686GX300-3V

128

CMM7686GX300-3V

C

HAPTER

8: L

IMITED

W

ARRANTY

RTD Embedded Technologies, Inc. warrants the hardware and software products it manufactures and produces to be free from defects in materials and workmanship for one year following the date of shipment from RTD Embedded Technologies, INC. This warranty is limited to the original purchaser of product and is not transferable.

During the one year warranty period, RTD Embedded Technologies will repair or replace, at its option, any defective products or parts at no additional charge, provided that the product is returned, shipping prepaid, to RTD Embedded Technologies. All replaced parts and products become the property of RTD Embedded Technologies. Before returning any product for repair, customers are required to contact the factory for an RMA number.

THIS LIMITED WARRANTY DOES NOT EXTEND TO ANY PRODUCTS WHICH HAVE

BEEN DAMAGED AS A RESULT OF ACCIDENT, MISUSE, ABUSE (such as: use of incorrect input voltages, improper or insufficient ventilation, failure to follow the operating instructions that are provided by RTD Embedded Technologies, "acts of God" or other contingencies beyond the control of RTD Embedded Technologies), OR AS A RESULT OF SERVICE OR MODIFICATION

BY ANYONE OTHER THAN RTD Embedded Technologies. EXCEPT AS EXPRESSLY SET

FORTH ABOVE, NO OTHER WARRANTIES ARE EXPRESSED OR IMPLIED, INCLUDING,

BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF MERCHANTABILITY AND FIT-

NESS FOR A PARTICULAR PURPOSE, AND RTD Embedded Technologies EXPRESSLY DIS-

CLAIMS ALL WARRANTIES NOT STATED HEREIN. ALL IMPLIED WARRANTIES,

INCLUDING IMPLIED WARRANTIES FOR MECHANTABILITY AND FITNESS FOR A

PARTICULAR PURPOSE, ARE LIMITED TO THE DURATION OF THIS WARRANTY. IN

THE EVENT THE PRODUCT IS NOT FREE FROM DEFECTS AS WARRANTED ABOVE,

THE PURCHASER'S SOLE REMEDY SHALL BE REPAIR OR REPLACEMENT AS PROVID-

ED ABOVE. UNDER NO CIRCUMSTANCES WILL RTD Embedded Technologies BE LIABLE

TO THE PURCHASER OR ANY USER FOR ANY DAMAGES, INCLUDING ANY INCIDEN-

TAL OR CONSEQUENTIAL DAMAGES, EXPENSES, LOST PROFITS, LOST SAVINGS, OR

OTHER DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PRODUCT.

SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR

CONSEQUENTIAL DAMAGES FOR CONSUMER PRODUCTS, AND SOME STATES DO

NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE

ABOVE LIMITATIONS OR EXCLUSIONS MAY NOT APPLY TO YOU.

THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE

OTHER RIGHTS WHICH VARY FROM STATE TO STATE.

129

CMM7686GX300-3V

130

CMM7686GX300-3V




USA

Our website: www.rtd.com

CMM7686GX300-3V

CMM7686GX300-3V cpuModule

User’s Manual

RTD Enhanced Award BIOS Versions 4.51.xx

CMM7686GX300-3V cpuModule

User’s Manual

HAPTER

NTRODUCTION

Specifications

CMM7686GX300-3V

Video Controller

DMA, Interrupts, Timers

Memory Configurations

Fail-safe Boot ROM

™

Solid State Disk Socket

Peripherals

BIOS

Connections

Physical Characteristics

Operating environment

Power Consumption

HAPTER

ETTING

TARTED

Basic Connector Locations

Fail safe boot rom

Cable Kits

Connecting Power

Connecting the utility cable

Connecting a Keyboard

Connecting to the PC/104 Bus

Connecting to the PC/104-Plus PCI Bus

PCI Bus Signaling Levels

Slot Selection Switches

This requirement means that all PC/104 Plus cards must be stacked either on the top or the bottom of the CPU, not on both sides.

PCI Bus Expansion Card Power

+5 Volt DC

+3.3 Volt DC

Booting the cpuModule for the First Time

Default Configuration

Booting to Boot Block Flash with Fail Safe Boot ROM

If You Misconfigure the cpuModule

For More Information

HAPTER

ONNECTING THE CPU

ODULE

I/O Connections

Connector Locations

Auxiliary Power,

Power Supply Protection

Serial Port 1, CN7

First Serial Port UART

RS232 Serial Port (Default)

RS422 or RS485 Serial Port

When using half-duplex in 485 connect the ports as shown in the table below.

RS422 and RS485 Mode Pinout

when using RS422 or RS485 Mode

Serial Port 2, CN8

Second Serial Port UART

RS232 Serial Port (Default)

RS422 or RS485 Serial Port

When using half-duplex in 485 connect the ports as shown in the table below.

when using RS422 or RS485 Mode

Parallel Port, CN6

Multifunction Connector, CN5

Speaker

Keyboard

System Reset

Battery

VGA Video Connector, CN12

Bus Mouse Connector, CN4

PC/104 Bus, CN1 and CN2

PC/104 Bus Signals

PC/104 Bus Termination

PC/104-Plus PCI Bus, CN16

PC/104-Plus PCI Bus Signals

Address and Data

Interface Control Pins

Error Reporting

**This requirement means that all PC/104 Plus cards must be stacked either on the top or the bottom of the CPU, not on both sides.**

**PC/104-Plus PCI Bus Signals**