a-trend ATC-1425B Mainboard user's guide

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SYSTEM FEATURES

: Supports all of 5V and 3.3V 486 CPUs, includes AmDX4-100/120, Am5x86-P75, and Cyrix 5x86.
: Flexible architecture to support 128/256/512KB Direct mapped cache scheme.
: Supports 4 stage power saving: On/Doze/Standby/Suspend.
: Supports L1/L2 Write back/Write through cache feature.
: Supports 72-pin dual type SIM modules.
: Memory configurations from 1MB up to 256MB by using 256KB/ 1MB/4MB/8MB/16MB/32MB/64MB SIM module.
: Supports SMI/SMM/PMU/APM power controllers.
: Dual IDE connectors support up to four devices in two channels.
: On-board high speed I/O includes 2 serial (16550 fast UART compatible), 1 parallel (EPP/ECP), and 1 FDC.

 

CHECK LIST OF THE PACKING
The mainboard comes securely packed in a durable box and shipping carton.
Inside the box, the mainboard is sandwiched between two sheets of sponge and packed in an anti-static bag.

Each mainboard containing:
Q'TY Description

1 Mainboard : ATC-1425B
1 Diskette : Enhanced IDE driver (3.5").
1 Cable : Enhanced IDE connector.
1 Cable : F.D.D connector.
1 Cable : Serial port.
1 Cable : Serial/Parallel.
1 Manual : User`s manual.

 

If any of the above items is missing or damaged, please contact the dealer from whom you purchased.

NOTE : Leave the mainboard in its original packing until you are ready to install it.

CPU type setting

CPU type

JP18

JP19

JP20

JP21

JP22

JP23

JP24
486DX(5V)

open

open

1-2

2-3

2-3

open

open
486SX

open

open

1-2

2-3

2-3

open

open

 

CPU type

JP25

JP26

JP27

JP28

JP29

JP30

JP31
486DX(5V)

open

open

1-2,3-4

open

open

open

3-4
486SX

open

open

2-3

open

open

open

open

 

CPU type

JP18

JP19

JP20

JP21

JP22

JP23

JP24
P24T

open

1-2

1-2

open

1-2

open

1-2
P24D

open

1-2

open

1-2

1-2

1-2

1-2
S-SERIES

open

1-2

1-2

2-3

2-3

open

open

A80486DX4-100 &EW is "WRITE-BACK" type, set "P24D" type.

A80486DX4-100 &E is "WRITE-THROUGH" type, set "S-SERIES" type.

 

CPU type

JP18

JP19

JP20

JP21

JP22

JP23

JP24
Am5x86-P75

close

1-2

1-2

1-2

1-2

1-2

1-2
Enhanced Am486

open

1-2

1-2

1-2

1-2

1-2

1-2
Am486DXL(3.45V)

open

2-3

*1-2/2-3

open

2-3

open

open

*(1-2 486DX4; 2-3 486DX2)

CPU type

JP25

JP26

JP27

JP28

JP29

JP30

JP31
Am5x86-P75

1-2,3-4

open

1-2,3-4

2-3

2-3

4-5

3-4
Enhanced Am486

1-2,3-4

open

1-2,3-4

2-3

2-3

4-5

3-4
Am486DXL(3.45V)

open

3-4

1-2,3-4

4-5

open

open

1-2,3-4

A80486DX4-100SV8B and A80486DX4-120SV8B are "WRITE-BACK" type, set "Enhanced Am486" type.

A80486DX4-100NV8T and A80486DX4-120NV8T are "WRITE-THROUGH" type, set "Am486DXL(3.45V)" type, JP20 set "1-2".

CPU type

JP18

JP19

JP20

JP21

JP22

JP23

JP24

CYRIX CX486

open

1-2

1-2

1-2

2-3

open

2-3
CYRIX 5x86

open

1-2

1-2

1-2

2-3

1-2

1-2

CPU type

JP25

JP26

JP27

JP28

JP29

JP30

JP31
CYRIX CX486

2-3

2-3

1-2,3-4

1-2

open

2-3

3-4
CYRIX 5x86

1-2,3-4

open

1-2,3-4

2-3

2-3

4-5

3-4

 

CPU speed setting

CPU SPEED

JP14

JP13

JP12
DX25/DX2-50/DX4-75

OPEN

OPEN

OPEN
DX33/DX2-66/DX4-100

OPEN

CLOSE

CLOSE
DX40/DX2-80/DX4-120

OPEN

OPEN

CLOSE
DX50

OPEN

CLOSE

OPEN

 

CPU voltage setting

CPU Voltage

JP34

JP35

5V

1-2

open

3.45V

2-3

1-3,2-4

4V

2-3

3-5,4-6

NOTE: Am5x86-P75+ please follow the setting as 'Enhanced Am486','DX50', and '3.45V '; JP10 set '2-3'.

Am5x86-P90 please follow the setting as 'Am5x86-P75', 'DX40', and '3.45V'; JP10 set '2-3'.

 

 

SIM MODULES INSTALLATION

The SiS 486 PCI/ISA mainboard can be expanded from 1MB to 256MB by using 256K, 1MB, 2MB, 4MB, 8MB, 16MB, 32MB, and 64MB of 72-pin SIM module.

"Free Table" feature is offered for main memory configuration. The product

works with one SIMM plugs into any SIMM sockets.

 

SRAM INSTALLATION

This mainboard can support cache memory from128K to 512K bytes with the types of 32KX8, 64KX8, or 128KX8 SRAM.

 

Cache Configuration Size

Cache

Size

TAG SRAM

(U21)

DATA SRAM

(U17-20)

JP16

JP32

JP33

JP36

128K

8KX8

32KX8

1-2

1-2

1-2

1-2,3-4

256K

32KX8

64KX8

2-3

1-2

2-3

1-2,3-4

512K

32KX8

128KX8

1-2

2-3

2-3

1-2,3-4

OTHER JUMPERS SETTING

Other jumpers setting

 

JP10
   

JP38*

Synchronous clock

1-2
 

Flash ROM

1-2, 5-6

Asynchronous clock

2-3
 

EPROM

2-3, 5-6
The pin-5 and pin-6 is fixed by factory default setting.

 

J11

External Battery

1-2

Internal Battery

2-3

Clear CMOS

3-4

 

Connectors description

Connector

Description

J12
Reset

J13
HDD LED

J14
Turbo LED

J15
Turbo Switch

J16
Speaker Connector

J17
Keylock

 

AWARD BIOS SYSTEM CONFIGURATION SETUP

This chapter explains how to set up system configuration (CMOS) under the AWARD BIOS. The SETUP program is stored in the ROM on the mainboard. To do the SETUP procedure, press <Del> key when the system is booting up. The following main menu will appear. Please select "STANDARD CMOS SETUP" to enter the next screen.

 

STANDARD CMOS SETUP PASSWORD SETTING
BIOS FEATURES SETUP IDE HDD AUTO DETECTION
CHIPSET FEATURES SETUP SAVE & EXIT SETUP
POWER MANAGEMENT SETUP EXIT WITHOUT SAVING
PCI CONFIGULATION SETUP  
LOAD BIOS DEFAULTS  
LOAD SETUP DEFAULTS  
Esc: Quit Enter : Select Item
F10: Save & Exit Setup (Shift)F2: Change Color
Virus protection, Boot sequence ...  

STANDARD CMOS SETUP PASSWORD SETTING
BIOS FEATURES SETUP IDE HDD AUTO DETECTION
CHIPSET FEATURES SETUP SAVE & EXIT SETUP
POWER MANAGEMENT SETUP EXIT WITHOUT SAVING
PCI CONFIGULATION SETUP  
LOAD BIOS DEFAULTS  
LOAD SETUP DEFAULTS  
Esc: Quit Enter : Select Item
F10: Save & Exit Setup (Shift)F2: Change Color
Virus protection, Boot sequence ...  

 

Date (mm:dd:yy) : Mon, Oct. 2 1995  
Time(hh:mm:ss) : 3 : 17 : 1  
HARD DISKS TYPE SIZE CYLS HEAD PRECOMP LANDZ SECTOR MODE
Primary Master : AUTO 0 0 0 0 0 0 --------
Primary Slave : AUTO 0 0 0 0 0 0 --------
Primary Slave : AUTO 0 0 0 0 0 0 --------
Primary Slave : AUTO 0 0 0 0 0 0 --------
   
Drive A : 1.2M, 5.25 in.

Base Memory : 640K
Drive B : None

Extended memory : 11264K
 

Other Memory : 384K
Video : EGA/VGA

------------------------------------------------
Halt On: All Errors

Total Memory : 12288K
    ESC : Quit Enter : Select Item PU/PD/+/- : Modify
    F1 : Help (Shift) F2 : Change Color

 

STANDARD CMOS SETUP PASSWORD SETTING
BIOS FEATURES SETUP IDE HDD AUTO DETECTION
CHIPSET FEATURES SETUP SAVE & EXIT SETUP
POWER MANAGEMENT SETUP EXIT WITHOUT SAVING
PCI CONFIGULATION SETUP  
LOAD BIOS DEFAULTS  
LOAD SETUP DEFAULTS  
Esc: Quit Enter : Select Item
F10: Save & Exit Setup (Shift)F2: Change Color
Virus protection, Boot sequence ...  

 

Virus Warning : Disabled Video BIOS Shadow : Enabled
CPU Internal Cache : Enabled C8000-CFFFF Shadow : Disabled
External Cache : Enabled D0000-D7FFF Shadow : Disabled
Quick Power On Self Test : Disabled D8000-DFFFF Shadow : Disabled
Boot Sequence : A, C  
Swap Floppy Drive : Disabled  
Boot Up Floppy Seek : Enabled  
Boot Up NumLock Status : On  
Boot Up System Speed : High  
Gate A20 Option : Fast  
Typematic Rate Setting : Disabled  
Typematic Rate (Chars/Sec) : 6  
Typematic Delay (Msec) : 250 Esc : Quit Enter : Select Item
Security Option : Setup F1 : Help U/PD/+/- : Modify
    F5 : Old Values (Shift)F2:Color
    F6 : Load BIOS Defaults
    F7 : Load Setup Defaults

STANDARD CMOS SETUP PASSWORD SETTING
BIOS FEATURES SETUP IDE HDD AUTO DETECTION
CHIPSET FEATURES SETUP SAVE & EXIT SETUP
POWER MANAGEMENT SETUP EXIT WITHOUT SAVING
PCI CONFIGULATION SETUP  
LOAD BIOS DEFAULTS  
LOAD SETUP DEFAULTS  
Esc: Quit Enter : Select Item
F10: Save & Exit Setup (Shift)F2:Change Color
At clock, DRAM timings ....  

 

Auto Configuration : Enabled Onboard 496B IDE Port : Both
    IDE 0 Master Mode : Auto
ISA Bus Clock : 7.159MHz IDE 0 Slave Mode : Auto
LBD# Sample Point : End of T2 IDE 1 Master Mode : Auto
    IDE 1 Slave Mode : Auto
Cache Write Cycle : 2 CCLK IDE Prefetch Read Buffer : Disable
Cache Burst Read Cycle : 1 CCLK IDE HDD Block Mode : Enable
L2 Cache/DRAM Cycle WS : 2 CCLK    
    Onboard FDC Control : Enable
DRAM RAS to CAS Delay : 3 CCLK Onboard Serial Port 1 : COM1
DRAM Write Cycle : 1 WS Onboard Serial Port 2 : COM2
DRAM Write CAS Pulse : 2 CCLK Onboard Parallel Port : 378H
DRAM CAS Precharge Time : 1 CCLK Onboard Printer Mode : Compatible
DRAM RAS to MA Delay : 1 CCLK    
DRAM Speed : Faster    
DRAM Slow Refresh : Disable Esc: Quit Enter : Select Item
    F1 : Help PU/PD/+/- :Modify
CPU Burst Write : Disabled F5 : Old Values (SHIFT)F2: Color
L2 Cache Policy : Write Back F6 : Load BIOS Defaults  
L2 Cache Tag Bits : 8 bits F7 : Load Setup Defaults  

STANDARD CMOS SETUP PASSWORD SETTING
BIOS FEATURES SETUP IDE HDD AUTO DETECTION
CHIPSET FEATURES SETUP SAVE & EXIT SETUP
POWER MANAGEMENT SETUP EXIT WITHOUT SAVING
PCI CONFIGURATION SETUP  
LOAD BIOS DEFAULTS  
LOAD SETUP DEFAULTS  
Esc : Quit Enter : Select Item
F10: Save & Exit Setup (Shift)F2:Change Color
Sleep Timer, Suspend Timer .....  

 

Power Management : Disabled IRQ 4 (COM1) :Enable
PM Control by APM : Yes IRQ 5 (LPT 2) :Enable
Video Off Option : Susp,Stby -> Off IRQ 6 (Floppy Disk) :Enable
Video Off Method : V/H SYNC+Blank IRQ 7 (LPT 1) :Enable
Suspend Switch : Disable IRQ 8 (RTC Alarm) :Disable
** PM Timers ** IRQ 9 (IRQ2 Redir) :Enable
HDD Off After : Disable IRQ10(Reserved) :Enable
Doze Mode : Disable IRQ11(Reserved) :Enable
Standby Mode : Disable IRQ12(PS/2 Mouse) :Enable
Suspend Mode : Disable IRQ13(Coprocessor) :Enable
** PM Events ** IRQ14(Hard Disk) :Enable
PCI Master Activity : Disable IRQ15(Reserved) :Enable
COM Ports Activity : Enable    
LPT Ports Activity : Enable Esc : Quit

Enter : Select Item
HDD Ports Activity : Enable F1 : Help PU/PD/+/-:Modify
DMA Ports Activity : Disable F5 : Old Values (Shift) F2 : Color
VGA Activity : Disable F6 : Load BIOS Defaults  
IRQ3 (COM 2) : Enabled F7 : Load Setup Defaults  

STANDARD CMOS SETUP PASSWORD SETTING
BIOS FEATURES SETUP IDE HDD AUTO DETECTION
CHIPSET FEATURES SETUP SAVE & EXIT SETUP
POWER MANAGEMENT SETUP  
PCI CONFIGURATION SETUP  
LOAD BIOS DEFAULTS  
LOAD SETUP DEFAULTS  
Esc : Quit Enter : Select Item
F10: Save & Exit Setup (Shift)F2:Change Color
Sleep Timer, Suspend Timer .....  

 

PnP BIOS Auto-Config : Enable PCI Master Burst Read/Write : Disable
     
Slot 1 Using INT# : AUTO  
Slot 2 Using INT# : AUTO  
Slot 3 Using INT# : AUTO  
     
     
     
     
PCI IRQ Actived By : Edge  
PCI IDE 2nd Channel : Enable  
PCI IDE IRQ Map To : PCI - AUTO  
Primary IDE INT# : A Esc: Quit Enter : Select Item
Secondary IDE INT# : B F1 : Help PU/PD/+/-:Modify
Master Arbitration Protocol : Weak F5 : Old Values (Shift)F2:Color
CPU->PCI Mem Post Write Buf : Enable F6 : Load BIOS Defaults
CPU->PCI Memory Burst Write : Disable F7 : Load Setup Defaults

 

STANDARD CMOS SETUP PASSWORD SETTING
BIOS FEATURES SETUP IDE HDD AUTO DETECTION
CHIPSET FEATURES SETUP SAVE & EXIT SETUP
POWER MANAGEMENT SETUP EXIT WITHOUT SAVING
PCI/GREEN FUNCTION SETUP  
LOAD BIOS DEFAULTS  
LOAD SETUP DEFAULTS  
Esc : Quit Enter : Select Item
F10: Save & Exit Setup (SHIFT)F2:Change Color
Save data to CMOS & Exit setup  

 

STANDARD CMOS SETUP PASSWORD SETTING
BIOS FEATURES SETUP IDE HDD AUTO DETECTION
CHIPSET FEATURES SETUP SAVE & EXIT SETUP
POWER MANAGEMENT SETUP EXIT WITHOUT SAVING
PCI/GREEN FUNCTION SETUPLOAD  
LOAD BIOS DEFAULTS SAVE to CMOS and EXIT (Y/N):Y
LOAD SETUP DEFAULTS  
Esc : Quit  
F10: Save & Exit Setup (SHIFT)F2:Change Color
Save data to CMOS & Exit setup