User's Manual
for
486DX
VL- BUS Main Board
1 ® peed Your Wiorld
MB4S3
80486 VL-BUS MAIN BOARD
with light green pc
470-024531990
USER'S MANUAL
Table of Contents
Chapter 1 Introduction
1-1 System Board Feature
1-2 System Board Layout
2
3
Chapter 2 Configuration
2-1 Jumper setting and Connector
2-2 DRAM Installation
2-3 Cache memoiy Installation
4
6
7
Chapter 3 AMI BIOS Setup
3-1 Standard CMOS Setup
3-2 Advance CMOS Setup
3-3 Advance Chipset Setup
3-4 Power Management Setup
3-5 Power Management Jumper setting
3-6 Standard type of hard disk
9
10
11
12
14
15
Chapter 4 AWARD BIOS SETUP
4-1 Standard CMOS Setup
4-2 BIOS Features Setup
4-3 Chipset Features Setup
4-4 Power Management Setup
4-5 Standard type of hard disk
17
18
19
20
22
l
Chapter 1
1-1 SYSTEM BOARD Feature
CPU
: 80486DX(PGA)
P23(PGA)
P23N(PGA)
M6(Cyrix,PGA)
Co-processor
: Cx87(PQFP) for M6 only
Cache memory : 32KB/64KB/128KB/256KB
Selectable
Main Memory
32MB max on board
Using 256K, IM, 4M SIMM
Support 1/2/4/5/8/16/17/20/32
MB memory
I/O SLOT
6 16-bit and 1 8-bit ISA Slots,
3 VL-BUS Slots
BIOS
AMI, Award or other
2
1-2 System Board Layout
MEGAKEY INSTALLION WITH LIGHT GREEN PC
TTL 74LS74
\
CX87S
CPU(PGA)
JP10 JP9 JP8
3
TAG SRAM (U20)
Chapter 2
2-1 Jumper setting amid connector
Jl : Keyboard Connector
J2 : External Battery Connector
J3 : Power Connector
J4 : Hardware Reset
J5 : Turbo LED
J6 : Turbo Switch
J7 : Power LED and Key Lock
J8 : Speaker
JP15 : Cx87 Selectable
2-3 Present
1-2 Absent
JP11,JP 12: CPU Configuration
U15(CPU)
JP11
JP12
486
1-2
1-2,3-4
P23
OPEN
2-3
2-3
1-2,3-4
P23N
4
JP16,JP17 : VESA BUS Jumper
1-2 : Default Setting
2-3 : Delay it for 50MHz
JP13 : VESA BUS Jumper
OPEN : CPU Clock <= 33MHz
CLOSE : CPU Clock > 33MHz
JP1 : Power Good select
1-2 : External Power Good
2-3 : Internal Power Good
JP3,4,5 : CPU Clock select
JP3
JP4
25MHz
IN
OUT
OUT
33MHz
IN
IN
IN
40MHz
IN
IN
OUT
50MHz
OUT
OUT
IN
JP5
JP19 : Monitor Select
OPEN : Color
CLOSE : Mono
JP20 : Password Clear
OPEN : Normal
CLOSE : Password Clear
5
2-2 DRAM Installation
The memory is capable of supporting a minimum 1 Megabyte of
memory up to total 32 megabytes memory. The 256KB /1MB /
4MB SIMM memory are available.
Each bank consists of 4 sockets for SIMMs and the 80ns or faster
(Access time) Page mode DRAM is required. There are two bank
of memory (BankO and Bankl) , but you don't care which one is
BankO because the BIOS will automatically test which one is
BankO.
Before you even consider altering the memory configuration
on your main-board, please read this section as below:
BANKO
BANK 1
256KBx9
None
1 MB
256KBx9
256KBx9
2 MB
1MBx9
None
4 MB
1MBx9
256KBx9
5 MB
1MBx9
1MBx9
8 MB
4MBx9
None
16 MB
4MBx9
256KBx9
17 MB
4MBx9
1MBx.9
20 MB
4MBx9
4MBx9
32 MB
Total Memory
6
2-3 Cache memory Installation
This mainboard supports Cache SRAM configurations: 32KB,64KB, 128KB and 256KB.
Before you even consider altering the CACHE memory
configuration on your main-board, please read this section
as below:
CACHE MEMORY SIZE
32KB 64KB 128KB 256KB
DATA 8K8*4 8K8*8 32K8*4 32K8*8
RAM
TAG 8Kx8 8Kx8 8Kx8 32Kx8
RAM
1-2
JP6 2-3
2-3
1-2
1-2
JP7 OPEN OPEN 2-3
JP8 OPEN OPEN OPEN CLOSE
JP9 OPEN OPEN CLOSE CLOSE
JP10 OPEN CLOSE CLOSE CLOSE
7
Chapiter 3
BIOS SETUP
When the system is first powered on or reset, the BIOS
will display a copyright message on the first line of the
screen, then the BIOS will perform the diagnostics and
initialization.When all of the above tests have been passed,
the message
"Press [DEL] key to run SETUP utility"
is displayed. If the [DEL] key is pressed, the screen will be
cleared and then the following message will be showed:
BIOS SETUP PROGRAM-AMI BIOS SETUP UTILITIES
(C) 1993 American Megatrends Inc., All Rights Reservied
STANDARD CMOS SETUP
ADVANCED CMOS SETUP
ADVANCED CHIPSET SETUP
POWER MANAGEMENT SETUP
AUTO CONFIGURATION WITH BIOS DEFAULTS
AUTO CONFIGURATION WITH POWER-ON DEFAULTS
CHANGE PASSWORD
AUTO DETECT HARD DISK
HARD DISK UTILITY
WRITE TO CMOS AND EXIT
DO NOT WRITE TO CMOS AND EXIT
Standard CMOS Setup for Changing Time, Date,Hard Disk Type,etc.
Esc : Exit F2/F3 : Color F10 : Save & Exit
8
3-1 Standard CMOS Setup
AMIBIOS SETUP PROGRAM-STAND CMOS SETUP
(C) 1993 American Megatrends Inc., All right Rights Reserved
Date (mn/date/year): Tuejan 01 1980
Time (hour/min/sec): 16 : 45 : 44
Cyln
Hard Disk c: Type : Not Installed
Hard Disk d: Type : Not Installed
Floppy Drive A: : Not Installed
Floppy Drive B: : Not Installed
Primary Display : VGA/PGA/EGA
Keyboard
: Installed
.. Dec
Month Jan,Feb
Date 01,02,03,....
31
Year 1901,1902,. .2099
Head
Base Memory : 640 KB
Ext. Memory : 3328KB
WPcom LZone Sec Size
Sun Mon Tue Wed Thu Fri Sat
30 31
1
6
7
8
13
14
20
2
3
4
5
9
10
11
12
15
16
17
18
19
21
22
23
24
25
26
27
28
29
30
31
1
2
3
4
5
6
7
8
9
The setup program is completely menu-driven:
1 .Use arrow keys to select entry : Data, Time, Hard
Disk(C/D),Floppy, Display, and keyboard.
2.Use PgUp/PgDn key to modify the option of each
entry.
3. Use Esc to exit this screen.
9
3=2 Adavmce CMOS Setup
If you don't really understand the meanings of each
item, please don't change the default values. The
default setting maybe different from those shown
below:
AMIBIOS SETUP PROGRAM-ADVANCED CMOS SETUP
(C)1992 American Megatrends Inc,. All Right Reserved
Typematic Reat Programming
Enable
BootSector Virus ProTection
: Disable
Typematic Reat Delay (msec)
500
CPU Internal Clock Mode
: 1X
Typematic Reat (Chars/Sec)
30
IDE Block Mode Transfer
: Disable
Above 1MB Memory Test
Disable
IDE Standy Mode (Min.)
: Disable
Memory Test Tick Sound
Enable
Auto Key-Lock Timeout
: Disable
Memory Parity Error Check
Enable
Hit <Del> Message Display
Enable
Hard Disk Type 47 RAM Area
0:300
Wait For <F1> If Any Error
Enable
System Boot Up Num Lock
On
Number Processor Test
Weitek Processor
Floppy Drive Seek At Boot
System Boot Up Sequence
System Boot Up CPU Speed
External Cache Memory
Internal Cache Memory
Password Checking Option
Enable
Absent
Disable
C: ,A:
High
Enable
Enable
Setup
Note
"IDE Standby Mode (Min)" can be loaded with
values from 1 minute to 255 minutes to setup
the Hard disk entering power down mode.
10
3-3 Advance Chipset Setup
The advanced chipset setup is entirely chipset
specific portion and requires full knowledge about
the detail definition of UMC chipset. Each option
is tightly corresponding with the hardware structure.
Without our engineering change notice,we strongly
recommend"don't change any contents in advanced
chipset setup menu".
Enabled
Memory Remapping
AUTO Config Function
3-2-2-2
F Segment Shadow RAM
Cache Read Option
2 W.S.
E Segment Shadow RAM
Cache write Option
PageMode C000-C3FF shadow RAM
DRAM Type
2 W.S.
C400-C7FF shadow RAM
DRAM Wait State(s)
CPUCLK/5 C800-CBFF shadow RAM
Keyboard clock Select
CPUCLK/5 CCOO-CFFF shadow RAM
AT Clock Select
7/3 BCLK D000-D3FF shadow RAM
10 Recover Time
2~3T
D400-D7FF shadow RAM
Hold PD Bus
Slow
D800-DBFF shadow RAM
Refresh Cycle
DCOO-DFFF shadow RAM
Delay IT
Coprocessor Ready
in T2
Refresh Divider
Check ELBA# Signal
Disabled
Data Location of Local Bus
Non-Cacheable Block 1 Enable
LOWA20#,RC Emulation
4MB
Non-Cacheable Block-1 Size
OKB
Stretch 0WS# Signal Option
Non-Cacheable Block-1 Base
Disabled
Non-Cacheable Block2 Enable
16MB
Non-Cacheable Block-2 Size
OKB
Non-Cacheable Block-2 Base
Esc:Exit 4~»f<-:Sel (Ctrl)Pu/Pd:Modify Fl:Help F2/F3:Color
F5:01d Values F6:BIOS Setup Defaults F7:Power-On Defaults
11
: Enabled
: Cached
: Disable
: Cached
:Cached
: Disable
: Disable
: Disable
: Disable
: Disable
: Disable
:1
: ISA BUS
: None
: Do Not
|
^
$
3-4 Power Management Setup
The programmable timers for sequencing of power to
system, but the AMI "MEGAKEY" (U2) and TTL 74LS74
(U33) must be installed.
The timers can be loaded with values from 1 minute to 255
minutes. This mode can be extended to external devices.
The Standby Mode power savings options are:
. Down CPU Clock to 8 MHz
. Remove the sync signals from the video monitor
(this option requires an intelligent monitor that support
standby Mode)
Please don't down CPU clock when system processing any
information, such as : formatting diskette
AMIBIOS SETUP PROGRAM - POWER MANAGEMENT SETUP
(C)1993 American Megatrends Inc., All Right Reserved
PC GREEN MODE:2
: Disable
12
Wake up the system:
If the system PASSWORD had not been set up, pressing
any key or moving Mouse to Wake up the system.
If the system PASSWORD had been set up, moving mouse
to Wake up the system but keyboard can not input data
until type the PASSWORD first. [ Type PASSWORD also
Wake up the system when Mouse is not being used. ]
If the system PASSWORD had been setup and when the
system is entering power down mode, the LEDs on Keyboard will "blinking" until your type the PASSWORD.
13
3-5 Power Management Jumper Setting
NOTE :
FOR AMI BIOS ONLY
JP20 : Display card power management
Pin 1 : V-sync
Pin 2 : H-sync
Pin 3 : sync enable
Pin 4 : general purpose I/O
JP21 : IRQ 3,5 power management select
1-2 short : IRQ 3
2-3 short : IRQ 5
JP22 : IRQ 4,7 power management select
1-2 short : IRQ 4
2-3 short : IRQ 7
14
3-6 Standard type of bard disk
Type
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
Cvln
306
615
615
940
940
615
930
936
900
820
855
855
306
733
000
612
977
977
1024
733
733
733
306
925
925
754
754
699
823
918
1024
1024
1024
612
1024
1024
615
987
987
820
977
981
830
830
917
1224
Heads
4
4
6
8
6
4
15
16
15
3
5
7
8
7
0
4
5
7
7
5
7
5
4
7
9
7
11
7
10
7
11
15
5
2
9
8
8
3
7
6
5
5
7
10
15
15
W-Pcomp
128
300
300
512
512
65535
0000
0000
65535
65535
65535
65535
128
65535
0000
0000
300
65535
512
300
300
300
0000
0000
65535
754
65535
256
65535
918
65535
65535
1024
128
65535
512
128
987
987
820
977
981
512
65535
65535
65535
15
L-Zone
305
615
615
940
940
615
000
000
901
820
855
855
319
733
000
663
977
977
1023
732
732
733
336
925
925
754
754
699
823
918
1024
1024
1024
612
1024
1024
615
987
987
820
977
981
830
830
918
1223
Sect
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17 .
17
17
17
17
17
17
17
17
17
17
17
17
17
17
Capacity
10MB
21MB
31MB
62MB
47MB
20MB
116MB
124MB
112MB
20MB
35MB
50MB
20MB
43MB
00MB
20MB
41MB
57MB
60MB
30MB
43MB
30MB
10MB
54MB
69MB
44MB
69MB
41MB
68MB
53MB
94MB
128MB
43MB
10MB
77MB
68MB
41MB
25MB
57MB
41MB
41MB
41MB
48MB
69MB
114MB
152MB
Chapter 4
AWARD BIOS SETUP
When the system is first powered on or reset, the BIOS
will display a copyright message on the first line óf the
screen, then the BIOS will perform the diagnostics and
initialization. When all of the above tests have been passed,
the message
"Press D E L to enter SETUP, E S C to skip memory
test"
is displayed. If the [DEL] key or [ctrl-alt-esc] is pressed, the
screen will be cleared and then the following message
will be showed:
ROM ISA BIOS (XXXXXXXX)
CMOS SETUP UTILITY
AWARD SOFTWARE. INC.
STANDARD CMOS SETUP
PASSWORD SETTING
BIOS FEATURES SETUP
IDE HDD AUTO DETECTION
CHIPSET FEATURES SETUP
SAVE & EXIT SETUP
POWER MANAGEMENT SETUP
EXIT WITHOUT SAVING
LOAD BIOS DEFAULTS
LOAD SETUP DEFAULTS
16
4-1 Standard CMOS Setup
Date (mn/date/year) : Tue, Jan 01 1980
Time (hh/min/sec): 16 45 : 4 4
Drive C: None ( 0Mb)
Drive D: None ( 0Mb)
Drive A:
Drive B:
: None
: None
Video : EGA/VGA
Halt On : All Errors
CYLS HEADS PRECOMP LANDZONE SECTORS
0
0
0
0
0
0
0
0
0
0
Base Memory:
640K
Extended Memory: 3328K
Expended Memory:
OK
Other Memory:
128K
Total Memory:
4096K
The setup program is completely menu-driven:
1 .Use arrow keys to select entry : Data, Time, Hard
Disk(C/D),Floppy, and Display.
2.Use PgUp/PgDn key to modify the option of each
entry.
3. Use Esc to exit this screen.
17
4=2 BIOS Feature Setup
I f you don't really understand the meanings o f each
item, please don't change the default values. The
default setting maybe different from those shown
below:
ROM ISA BIOS (XXXXXXXX)
BIOS FEATURES SETUP
AWARD SOFTWARE, INC.
Typematic Reat Setting
: Disabled
System BIOS Shadow
: Enabled
Typematic Reat (Msec)
: 250
Video BIOS Shadow
: Enabled
Typematic Reat (Chars/Sec)
:6
C8000-CBFFF Shadow
: Disabled
Security Option
: Setup
CC000-C7FFF Shadow
: Disabled
Memory Parity Check
: Enabled
DOOOO-D3FFF Shadow
: Disabled
Quick Power on Seft Test
: Enabled
D4000-D7FFF Shadow
: Disabled
Boot Up NumLock Status
: On
D8000-DBFFF Shadow
: Disabled
Boot Up System Speed
: High
DC000-DFFFF Shadow
: Disabled
Boot Up Floppy Seek
: Disabled
E0000-E3FFF Shadow
: Disabled
Boot Sequence
: А, С
E4000-E7FFF Shadow
: Disabled
CPU Internal Cache
: Enabled
E8000-EBFFF Shadow
: Disabled
Gate A20 Option
: Fast
EC000-EFFFF Shadow
: Disabled
External Cache
: Enabled
18
4-3 Chipset Features Setup
The Chipset Features Setupis entirely chipset
specific portion and requires full knowledge about
the detail definition of UMC chipset. Each option
is tightly corresponding with the hardware structure.
Without our engineering change notice,we strongly
recommend"don't change any contents in advanced
chipset setup menu".
ROM ISA BIOS (XXXXXXXX)
CHIPSET FEATURES SETUP
AWARD SOFTWARE, INC.
Auto Configuration
Cache Read Burst
Enabled
3-2-2-2
Cache Write Wait State
1WS
DRAM Type
DRAM Wait State
LOWA20# Emulation
RC Reset Emulation
System BIOS Cacheable
Keyboard Clock
Normal Page
2 WS
9.5 MHz
AT Clock
CPUCLK/6
10 Recovery For ISA/PCB
BCLK: 9/3
DMA/Master Cycle
HOLD 2-3T
Slow Refresh
Memory Remap
Disabled
Disabled
19
Video BIOS Cacheable
Non-Cacheable Block 1
Block 1 Start Address
Block 1 Size Address
: Disabled
: Disabled
: Disabled
: Disabled
: Disabled
OK
: 16K
4-4 Power Management Setup
The Standby Mode power savings options are:
. HDD Standby Timer :
The Hard disk entering power down mode.
. Display Power Down :
The display screen will be closed.
. System Slow Down :
Down CPU Clock to 8 MHz
ROM ISA BIOS ( X X X X X X X X )
POWER MANAGEMENTSETUP
AWARD SOFTWARE, INC.
POWER MANAGEMENT
: Disabled
HDD Standby Timer
: Disabled
Display Power Down
: Disabled
System Slow Down
: Disabled
20
POWER MANAGEMENT Timer Selection :
Disabled : All function disabled
Min Power saving :
HDD Standby Timer : 15 Min
Display Power Down : 15 Min
System Power Down : 55 Sec
Max Power saving :
HDD Standby Timer : 1 Min
Display Power Down : 1 Min
System Power Down : 10 Sec
User Defined :
HDD Standby Timer : Disabled-15 Min
Display Power Down : Disabled-15 Min
System Power Down : Disabled-55 Sec
W a k e nap t h e system:
Pressing any key or moving Mouse to Wake up the system.
21
4=5 Standard type of hard disk
Type
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
USER
Size Cylinders Heads
306
4
10MB
615
4
20MB
6
30MB
615
940
8
62MB
940
6
46MB
615
4
20MB
30MB
462
8
30MB
733
5
900
15
112MB
20MB
820
3
35MB
855
5
7
49MB
855
306
8
20MB
42MB
733
7
Reserved
20MB
612
4
5
40MB
977
977
7
56MB
59MB
1024
7
733
5
30MB
7
42MB
733
306
5
30MB
977
4
10MB
1024
5
40MB
1224
9
76MB
7
71MB
1224
111MB
1224
11
1024
15
152MB
8
68MB
1024
918
11
93MB
83MB
925
11
1024
9
69MB
85MB
1024
10
1024
12
102MB
1024
13
110MB
1024
14
119MB
2
17MB
1024
16
136MB
1024
15
114MB
918
40MB
820
6
5
42MB
1024
5
65MB
1024
6
40MB
809
6
61MB
809
776
8
100MB
684
16
203MB
Sec
17
17
17
17
17
17
17
17
17
17
17
17
17
17
W-Pcomp
128
300
300
512
512
None
256
None
None
None
None
None
128
None
L-Zone
305
615
615
940
940
615
511
733
901
820
855
855
319
733
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
26
17
26
33
38
0
300
None
512
300
300
300
0
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
663
977
977
1023
732
732
733
336
976
1023
1223
1223
1223
1023
1023
1023
926
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
852
852
775
685
22
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