Installation Guide

AHA-1540CP/1542CP

ISA-to-SCSI Plug and Play

High-Performance Bus Master Host Adapter with SCSISelect Utility

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Introduction

This Installation Guide explains how to install and configure Adaptec AHA TM -1540CP/1542CP Plug and Play ISA-to-SCSI high-performance bus master host adapters. AHA-1540CP/1542CP host adapters are fully Plug and Play compliant.

The AHA-1540CP/1542CP supports the SCSI

Configured Automatically (SCAM) protocol, which assigns SCSI IDs dynamically and resolves SCSI ID conflicts automatically. If your PC system includes

SCSI disk drives or other devices that support

SCAM, you do not need to manually assign SCSI IDs to these devices.

This Installation Guide assumes that your PC system is

Plug and Play ready. You can make your PC Plug and

Play ready by installing Windows 95 or another operating system with built-in Plug and Play support.

AHA-1540CP/1542CP host adapters are also fully functional in non-Plug and Play PCs. See the

AHA-1540CP/1542CP User’s Guide for more detailed information on installing the host adapter in Plug and Play or non-Plug and Play PCs.

Caution: Keep the host adapter in its conductive wrapping until you are ready to install it in your PC. Before handling the host adapter, always ground yourself by touching an unpainted surface on your PC chassis.

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Host Adapter Layout

This diagram shows the major AHA-1540CP/

1542CP components.

The following table describes each component:

J1 J2 J3 J4

S1

Label Description

J1 External LED Connector

J2 Floppy Drive Connector

1

J3 Internal SCSI Connector

1

AHA-1542CP only.

Label Description

J4 External SCSI Connector

S1 Switch Block

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Installing the Host Adapter

Follow these steps to insert the host adapter in a slot:

WARNING: Turn OFF and disconnect the power to your PC and attached devices. See your PC’s documentation for instructions.

1 Remove the PC chassis cover to expose the expansion slots and expansion slot covers.

2 Identify an empty ISA expansion slot.

3 Remove the corresponding expansion slot cover from the rear opening on the PC chassis.

4 Change host adapter switch settings, if necessary.

Here are some reasons you might need to do this.

(See Host Adapter Switches on page 11, for more information):

– If you are installing the host adapter in a non-

Plug and Play PC, you may need to change its

I/O port address and/or BIOS address if they are already used by another board or device.

– Disable the AHA-1542CP floppy controller if you do not connect your floppy drives to it.

5 Align the bus connector on the bottom of the host adapter with the slot and carefully insert it into the slot.

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6 Attach the host adapter bracket to the PC chassis with the expansion slot cover screw.

Note: Do not replace the PC chassis cover or reconnect the power yet.

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Connecting SCSI Devices

This section explains how to connect SCSI disk drives, CD-ROM drives, and other kinds of SCSI devices to your AHA-1540CP/1542CP host adapter.

Caution: AHA-1540CP/1542CP host adapters support only single-ended SCSI devices.

Do not connect differential SCSI devices to the host adapter. Read the device documentation to determine whether a SCSI device is single-ended or differential.

Connecting Internal SCSI Devices

You can use the internal SCSI cable included with your host adapter to connect up to two internal SCSI devices. If you want to install more than two internal

SCSI devices, you must get a 50-pin internal SCSI cable with enough connectors for all devices.

1 Enable termination on the internal SCSI device that will be at the end of the cable farthest from the host adapter. Read the device documentation to determine how to do this.

2 Plug the 50-pin female connector on one end of the internal cable into the host adapter’s internal

SCSI connector, J3.

Note: Be sure to match pin 1 on the cable with pin 1 on the host adapter’s internal

SCSI connector. Pin 1 is marked with a contrasting color on one edge of the ribbon cable. Pin 1 is marked with a 1 on the host adapter SCSI connector, J3.

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3 Plug the last connector on the ribbon cable into the connector of the closest internal SCSI device.

Maintain pin-1 orientation.

4 Plug the middle connector on the SCSI cable into the connector of the second internal SCSI device, if there is one. Maintain pin-1 orientation.

Connecting External SCSI Devices

1 Attach the connector of a 50-pin, high-density external SCSI cable to the host adapter’s external

SCSI connector, J4. (External cables can only be plugged in one way, so pin-1 orientation is automatic.)

2 Plug the other end of the cable into one of the

SCSI connectors on the back of the first external

SCSI device.

3 If you have more than one external device, plug one end of an external cable into the first device’s other SCSI connector. Plug the other end of this cable into a SCSI connector on the next external device. Link all external devices like this.

4 Insert an active standard or an active passthrough terminator plug into the SCSI connector on the

last external SCSI device. Read the device documentation if you need more information.

Note: By default, the host adapter sets its own termination automatically. You only need to be concerned with setting termination on the other SCSI devices.

Assigning SCSI IDs

Each SCSI disk drive, CD-ROM drive, or other SCSI device must have a unique SCSI ID. Some newer

SCSI disk drives support SCAM (SCSI Configured

Automatically). The SCAM software included with your host adapter automatically assigns SCSI IDs to these devices when you boot your PC.

Some SCSI devices allow SCAM to read their SCSI

IDs, which are set via jumpers or switches, but do not allow SCAM to change the IDs dynamically.

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SCAM cannot change or read the SCSI IDs of some older SCSI devices. If you have any such devices and

SCAM is enabled on the host adapter, your PC may hang if SCAM tries to assign SCSI IDs that are already in use. If this is the case, you must disable

SCAM functions with the SCSISelect

™

utility (see

Configuring the SCSI Bus on page 8) and set SCSI IDs manually for all devices. See your SCSI device documentation to determine how, or if, your SCSI devices support SCAM.

If you need to set SCSI IDs with switches or jumpers, assign 0 and 1 to the first two SCSI hard disk drives.

The host adapter is set to SCSI ID 7 by default and should not be changed.

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Connecting Floppy Drives

(AHA-1542CP)

Follow these steps to connect floppy drives mounted inside the PC chassis to the host adapter. Use the

34-pin floppy ribbon cable already in your PC.

Note: If you do not use the floppy controller on the AHA-1542CP, disable switch sw5 ; see

Host Adapter Switches on page 11.

1 Attach the connector on the 34-pin floppy ribbon cable (farthest from the twist in the cable) to the host adapter’s floppy connector, J2. Maintain pin-1 orientation.

2 Attach the connector located closest to the twist of the floppy ribbon cable to the first floppy drive.

The twist in the cable designates drive A. Maintain pin-1 orientation.

3 Attach the middle connector of the floppy ribbon cable to the second floppy drive (drive B). Maintain pin-1 orientation.

4 If necessary, disable the floppy controller on the

PC’s motherboard or disk controller. See your PC documentation for details.

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5

Reassembling and Starting the PC

Follow these steps to reassemble and power the PC:

1 Check SCSI cable connections. They may have been loosened if you had to change switch settings on the SCSI device(s).

2 Replace the PC chassis cover, following the instructions in your PC’s documentation.

3 Be sure all power switches are OFF , then reconnect the power cables to your PC.

4 Turn ON the power for the external SCSI devices, and then turn ON the PC.

At system bootup the host adapter BIOS sign-on message appears on the monitor. The host adapter finds devices on the SCSI bus and assigns SCSI IDs to SCAM devices.

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Configuring the SCSI Bus

Your host adapter includes the SCSISelect utility, which lets you change SCSI configuration settings without opening your PC or editing configuration files. In a Plug and Play system you seldom need to change the default settings. However, you may want to change some SCSI features for particular devices to optimize performance or use the formatting or diagnostic utilities.

Running the SCSISelect Utility

If the AHA-1540CP/1542CP onboard BIOS is enabled with switches, you can start the SCSISelect utility by pressing Ctrl-A when the prompt appears at boot time. (The default for the BIOS is enabled.)

Also, an executable version of SCSISelect

(

cpconfig.exe

) is available on the Adaptec BBS. The

BBS phone number is listed on page 12 of this Instal-

lation Guide.

Use the

↑, ↓,

and Enter keys to make selections. Press

Esc to return to the previous menu. Press F6 to restore the originally manufactured SCSISelect default values. To abandon changes made, press Esc and select No when prompted to save the changes.

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If you have multiple AHA-1540CP/1542CP host adapters in your computer, use the SCSI Disk Utilities to determine which host adapter you are configuring.

Configure/View Host Adapter Settings

The Configuration screen displays these options:

Host Adapter Interrupt (IRQ) Channel, Host

Adapter DMA Channel, Host Adapter SCSI ID, SCSI

Parity Checking, DMA Transfer Rate, and Host

Adapter SCSI Termination. Highlight an option and press Enter to select the value.

Select SCSI Device Configuration to modify the following options for each device on the SCSI bus:

Enable Synchronous Negotiation, Enable Fast SCSI,

Enable Disconnection, Send Start Unit Command, and Include in BIOS Scan. You can set these options individually for each device on the SCSI bus.

Select Advanced Configuration Options to modify the remaining advanced options as listed on page 3.

Do not change these options unless you fully understand what they mean.

SCSI Disk Utilities

Select SCSI Disk Utilities from the Main menu to view a list of installed SCSI devices. When you select a device, the Utilities menu appears.

Format Disk runs the Adaptec SCSI low-level format utility. Verify Disk Media scans the selected device’s media for defects. If it finds bad blocks, it prompts you to reassign them.

Host Adapter Diagnostics

The Host Adapter Diagnostics option allows you to perform a Bus Master DMA test on your PC’s memory. Not all PC systems are fully ISA compatible and properly support Bus Master DMA transferswhich are necessary for optimized performance under multitasking operating systems like OS/2,

Windows 95, and NetWare.

The diagnostic program performs a memory transfer test and then repeats the process. If the test fails, try changing the DMA transfer rate to a lower setting in

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SCSISelect. You can stop the test at any time by pressing Esc. Your PC will reboot.

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Operating System Software Support

Windows 95

Windows 95 has embedded software support for your AHA-1540CP/1542CP host adapter. To install your host adapter under Windows 95, read the

Microsoft documentation for installing new hardware devices. Adaptec EZ-SCSI

™

has a number of

32-bit applications that enhance the usefulness of your SCSI devices under Windows 95. These include applications for power management, disk performance benchmarking, scanning documents and graphics, and partitioning disks.

DOS/Windows 3.x

Adaptec EZ-SCSI automatically loads the additional software support for the DOS/Windows 3.x operating systems if you want to do any of the following:

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■

Install more than two hard drives in your PC with the AHA-1540CP/1542CP under DOS prior to 5.0

Install more than eight hard drives (seven per host adapter) in your PC with the AHA-1540CP/

1542CP under DOS 5.0 and above

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Use a CD-ROM drive, scanner, or SCSI tape drive

Remove and insert CD-ROMs and other removable media while your PC is running

To order EZ-SCSI and other Adaptec software products, call the phone number listed on page 12.

Other Operating Systems

Netware, Windows NT, OS/2, and various versions of UNIX have embedded drivers to support the

AHA-1540CP/1542CP. Contact Adaptec or your operating system vendor for information on

AHA-1540CP/1542CP drivers for these operating systems. Plug and Play functions may not work on these operating systems; however, you can use the

AHA-1540CP/1542CP as a standard (non-Plug and

Play) host adapter.

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8

Troubleshooting Checklist

If a problem occurs during installation, check these items first:

■

Are the power cables and SCSI interface cables properly connected?

Connect internal devices to your computer’s power supply; plug external device power cables into a grounded line power outlet. Follow the instructions in the hardware documentation.

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■

Is the host adapter firmly seated and secured in a

16-bit expansion bus slot?

Is pin-1 orientation maintained throughout the

SCSI bus?

Is each SCSI device, including the host adapter, set to a unique SCSI ID?

Is SCSI termination set correctly?

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Host Adapter Switches

If you have a Plug and Play system, you do not need to change any of these switch settings. However, the settings are listed in the table below for your reference (*=default setting; off=open).

Plug and Play

Enabled*

Disabled sw1

Off

On

Floppy Controller

Enabled*

Disabled

I/O Port Address sw2 sw3 sw4 BIOS Address

330h to 333h*

334h to 337h

Off

On

Off

Off

Off

Off

DC000h*

D8000h sw5

Off

On sw6 sw7 sw8

Off Off Off

On Off Off

230h to 233h

234h to 237h

130h to 133h

134h to 137h

Off

On

Off

On

On

On

Off

Off

Off

Off

On

On

D4000h

D0000h

CC000h

C8000h

Off

On

Off

On

On

On

Off

Off

Off

Off

On

On

Reserved

Reserved

Off On On Reserved

On On On BIOS Disabled

1

Off

On

On

On

On

On

1

If you disable the onboard BIOS, you cannot boot your PC from a SCSI drive connected to the host adapter or run SCSISelect by pressing Ctrl-A at bootup. If you are installing more than one host adapter in your PC, only one host adapter BIOS should be enabled—the one that controls the boot device.

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Adaptec Customer Support Services

If you have questions about installing or using the host adapter, check this install guide first—you will find answers to most of your questions here. If you need further assistance, please contact us. We offer the following support and information services:

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For technical support (answers to technical questions, information about the Adaptec BBS, FTP and WWW Servers, and access to the Interactive Fax system), call 800-959-SCSI (7274) or 408-945-2550, 24 hours a day, 7 days a week. To speak with a product support representative, call 408-934-SCSI (7274), M–F:

6:00 a.m. to 5:00 p.m., Pacific Time.

For sales information, call 800-959-SCSI (7274) or 408-945-2550,

M–F: 6:00 a.m. to 5:00 p.m., Pacific Time.

The Adaptec Electronic Bulletin Board Service (BBS) provides information on software upgrades, answers to common questions, and other topics. The BBS is available 24 hours a day, 7 days a week, at 408-945-7727; 1200/2400/9600/14,400/28,800 baud, 8 data bits, 1 stop bit, no parity.

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The Adaptec FTP and WWW Servers provide information on software upgrades, product literature, answers to common questions, and other topics. The FTP and WWW Servers are available from the Internet 24 hours a day, 7 days a week, at ftp.adaptec.com

and http://www.adaptec.com

.

The Adaptec Interactive Fax system provides answers to common questions, product literature, and current information about Adaptec products and services. The Adaptec Interactive

Fax system is available 23 hours a day, 7 days a week. The Fax system is out of service 1 hour each day. You can call this service directly at 408-957-7150.

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To order Adaptec software and SCSI cables, call 800-442-SCSI

(7274) or 408-957-SCSI (7274), M–F: 6:00 a.m. to 5:00 p.m.,

Pacific Time.

To request additional documentation for Adaptec products, call 800-934-2766 or 510-732-3829, M–F: 6:00 a.m. to 5:00 p.m.,

Pacific Time.

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FCC Compliance Statement

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in residential installations. This equipment generates, uses, and can radiate radio frequency energy, and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation.

If this equipment does cause interference to radio or television equipment reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna

• Move the equipment away from the receiver

• Plug the equipment into an outlet on a circuit different from that to which the receiver is powered

• If necessary, the user should consult the dealer or an experienced radio/ television technician for additional suggestions

CAUTION: Only equipment certified to comply with Class B (computer input/output devices, terminals, printers, etc.) should be attached to this equipment, and must have shielded interface cables.

Finally, any changes or modifications to the equipment by the user not expressly approved by the grantee or manufacturer could void the user’s authority to operate such equipment.

Each host adapter is equipped with an FCC compliance label that shows only the FCC identification number. The full text of the associated label follows:

This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference and (2) this device must accept any interference received, including interference that may cause undesired operation.

Adaptec, Inc.

691 South Milpitas Blvd.

Milpitas, CA 95035

Copyright © 1994, 1995 Adaptec, Inc. All rights reserved.

Adaptec, the Adaptec logo, AHA, EZ-SCSI, and SCSISelect are trademarks of Adaptec, Inc. which may be registered in some jurisdictions. All other trademarks are owned by their respective owners.

Printed in Singapore

Stock No.: 510628-00, Rev. B LL 4/95

Information subject to change without notice.

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