Vextrec GMB-486SPS User manual

GMB-486SPS
High Performance
486
PCI Motherboard
User’s Manual
For
GMB-486sps v0
Manual Edition 1.03

i
ABOUT THIS GUIDE
This guide contains instructions for configuring and installing the mainboard.
• Chapter 1, Introduction, acquaints user with the special features of the mainboard.
• Chapter 2, Hardware Configuration, gives information on configuring memory and setting the
mainboard's jumpers. Brief sections on installing memory.
• Chapter 3, Mainboard Installation, is an overview of how to install the mainboard in a system.
• Chapter 4, BIOS Setup, provides the BIOS information for system configuration.
• Chapter 5, BIOS POST Messages, provides references for all POST error messages.
• Chapter 6, BIOS Default Drive Table, provides a Default Drive Disk table contained in Setup.
WARNING
For the system to operate normally please make sure JP38 of the mainboard is set as below. Refer to Fig 2 in
this manual for the location JP38.
If JP38 is open, no CMOS data can be retained.
The information presented in this publication has been carefully checked for reliability; however, no
responsibility is assumed for inaccuracies, whereas, specification is subjected to change without notice.
All rights reserved. No part of this Manual may be reproduced in any form without the written permission.

ii
UNPACKING THE MAINBOARD
The Mainboard comes packed in a sturdy cardboard shipping carton. The carton contains:
• The Mainboard
• PCI IDE Driver Diskette
• 40-pin Hard Disk Cable
• 34-pin Floppy Disk Cable
• 25-pin serial & 15-pin Game Port Cable
• 9-pin serial & 25-pin Parallel Port Cable
• This User's Guide
Note: Do not remove the mainboard from its original packing until ready to install.
The mainboard is easily damaged by static electricity. Observe the following precautions while unpacking and
installing the mainboard.
1. Touch an unpainted area of the system chassis before handling the mainboard or any component.
Doing so discharges the static charge the user's body may have built.
2. Remove the mainboard from its anti-static wrapping and place it on a grounded surface, component
side up.
3. Inspect the mainboard for damage. Shipping may have loosened integrated circuits from their
sockets. If any integrated circuit appears loose, press carefully to seat it firmly in this socket.
Do not apply power if the mainboard appears damaged. If there is damage to the board, or items are missing,
contact dealer immediately.

iii
CONTENTS
CHAPTER 1 INTRODUCTION 1
1.1 KEY FEATURES 1
1.2 MAINBOARD COMPONENTS 3
1.3 PCI LOCAL BUS SPECIAL FEATURES 4
CHAPTER 2 HARDWARE CONFIGURATION 5
2.1 JUMPER AND MEMORY BANK LOCATIONS 5
2.2 JP4-JP17, S4-S6 - CPU TYPE CONFIGURATION 6
2.3 CPU INSTALLATION 17
2.4 CACHE CONFIGURATION 18
2.4.1 UPGRADING CACHE 18
2.4.2 CACHE SIZE AND MEMORY LOCATIONS 19
2.4.3 CACHE CHIP SOCKETS AND JUMPER LOCATIONS19
2.4.4 JP19, JP24-JP26, JP20-JP22, JP27 - CACHE & TAG RAM JUMPER
SETTING 20
2.4.5 INSTALLING CACHE CHIPS 21
2.5 JP38 - CMOS RAM BATTERY SETTING 22
2.6 JP33 - MONITOR SETTING 22
2.7 S1-S3, JP3, JP18 - CPU CLOCK FREQUENCY
CONFIGURATION 23
2.8 JP34, JP35 - FLASH ROM JUMPERS 24
2.9 JP51 - PARALLEL PORT IRQ SELECTION 24
2.10 JP36, JP37, JP52, JP53 - PARALLEL PORT
SETTING AND ECP DMA SELECTION 25
2.11 MEMORY INSTALLATION 26
2.11.1 INSTALLING SIMM 29
CHAPTER 3 MAINBOARD INSTALLATION 31
3.1 COMPONENTS 31
3.2 INSTALLING THE MAINBOARD 32
3.3 CONNECTION THE MAINBOARD 32
3.3.1 CONNECTION LOCATIONS 33
3.4 CONNECTORS 33
3.4.1 J1 - RESET SWITCH CONNECTOR 33
3.4.2 J2 - TURBO LED CONNECTOR 34
3.4.3 J3 - KEYLOCK & POWER LED CONNECTOR 34
3.4.4 J4 - SPEAKER CONNECTOR 35
3.4.5 J5 - TURBO SWITCH CONNECTOR 35
3.4.6 J6 - GREEN PC BREAK SWITCH 35
3.4.7 J7 - HARD DISK LED CONNECTOR 36
3.4.8 J8 - EXTERNAL BATTERY 36
3.4.9 J12 - ON BOARD PCI IDE 0 HDD CONNECTOR 36
3.4.10 J13 - ON BOARD PCI IDE 1 HDD CONNECTOR 37
3.4.11 J14 - ON BOARD COM1 CONNECTOR 37
3.4.12 J15 - ON BOARD COM2 CONNECTOR 37
3.4.13 J16 - ON BOARD GAME PORT CONNECTOR 37
3.4.14 J17 - ON BOARD PARALLEL PORT
CONNECTOR 37
3.4.15 J18 - ON BOARD FDD CONNECTOR 37
3.4.16 J19 - KEYBOARD CONNECTOR 38
3.4.17 J20 - POWER SUPPLY CONNECTOR 38

iv
3.5 HARDDISK INSTALLATION 39
3.6 HARDWARE/SOFTWARE INSTALLATION 39
3.7 SYSTEM ASSEMBLY OVERVIEW 40
CHAPTER 4 AWARD BIOS SETUP 41
4.1 ENTERING SETUP 41
4.2 CONTROL KEYS 42
4.3 GETTING HELP 42
4.4 THE MAIN MENU 43
4.4.1 STANDARD CMOS SETUP MENU 44
4.4.2 BIOS FEATURES SETUP MENU 45
4.4.3 CHIPSET FEATURES SETUP MENU 46
4.4.4 POWER MANAGEMENT SETUP MENU 47
4.4.5 PCI CONFIGURATION SETUP MENU 49
4.4.6 LOAD BIOS DEFAULTS MENU 50
4.4.7 LOAD SETUP DEFAULTS MENU 50
4.4.8 PASSWORD SETTING MENU 50
4.4.9 IDE HDD AUTO DETECTION MENU 51
4.4.10 HDD LOW LEVEL FORMAT MENU 52
4.4.11 SAVE & EXIT SETUP MENU 54
4.4.12 EXIT WITHOUT SAVING MENU 54
CHAPTER 5 BIOS POST MESSAGE 55
5.1 POST BEEP 55
5.2 ERROR MESSAGES 55
CHAPTER 6 BIOS DEFAULT DRIVE TABLE 61
CHAPTER 7 APPENDIX A 63
7.1 CPU TYPE CONFIGURATION 63
7.2 CPU SUPPLY VOLTAGE SELECTION 64

Introduction
1
CHAPTER 1 INTRODUCTION
The mainboard is a 2/3 body AT size high-performance mainboard that provides with basic elements on which
to build an advanced computer. The mainboard running from 25MHz to 100MHz, supports Normal 486
CPUs, Intel's SL-Enhanced 486, P24D/P24T; P24C (486DX4), Cyrix Cx486S/DX/DX2/DX4, Cx486DX2-
V66/V80 (3.6-4.0V)/Cx486DX4 (3.45V)/Cx5x86 (3.3V), Am486DX2/DX4 (3.45V), Enhanced
Am486DX2/DX4 (3.45V), IBM 486-4V3100GIC/GC, SGS Thomson 486DX/DX2/DX4, UMC U5SX-486 &
TI 486DX2/DX4 CPUs.
1.1 KEY FEATURES
The advanced features of the mainboard include:
• Supports Intel's SL Enhanced 80486DX2/DX/SX, normal 486,
P24D/P24T, P24C (486DX4), Cyrix's Cx486S/DX/DX2/
DX4, Cx486DX2-V66/V80 (3.6-4.0V)/Cx486DX4 (3.45V)/Cx5x86
(3.3V), AMD Am486DX2/DX4 (3.45V), Enhanced Am486DX2/DX4
(3.45V), IBM 486-4V3100GIC/GC, SGS Thomson 486DX/DX2/DX4,
UMC U5SX-486 & TI 486DX2/DX4 CPUs.
• Supports Cache \Write back CPU
P24T/P24D/Cx486S/DX/DX2/DX2V/DX4/5x86/
Enhanced Am486DX2/DX4/IBM 486-4V3100GIC/GC, SGS Thomson
486DX/DX2/DX4 & TI 486DX2/DX4.
• 100% IBM PC-AT and PCI 2.0 compatible, 486 PCI solution.
• Provides power saving features to allow a system, through the control of
BIOS, to reduce the CPU clock frequency down to 0MHz
(STOP CLOCK) when the system is idle.
• Supports Power Management Mode
- Supports the SMM and the SMI
- CPU Stop Clock Function
- Long and Short System Timers
- Supports the APM control
- Supports Break Switch control
- Power Saving also on non-SMI CPU
- More System Event Monitoring and the Power saving Control
• Jumper select CPU supply voltage of 3.3/3.45/3.6/4.0/5.0V
• Direct Mapped Cache Controller
- Write-Back or Write-Through Schemes
- Bank Interleave or Non-Interleave Cache
- Flexible Cache Size: 128/256/512/1024KB
• Memory size from 1MB to 128MB, possible using combinations of
1M, 2M, 4M, 8M, 16M, 32M, or 64M 72-pin SIMM modules in four memory banks.
• Provide 2 enhanced PCI IDE channels that support up to 4 IDE devices.
• Provide FDD channels which support 360K, 720K, 1.2M & 1.44M floppy disks, two 16550
compatible UARTs, one Parallel port with EPP/ECP mode, and one joystick port.

Chapter 1
2
• Easy upgrade the system, just change CPU, or and alter jumper only.
• System & video Bios Shadow, optional caching of shadowed system & video BIOS.
• Flash ROM support.
• Hidden DRAM refresh support.
• Support 7 Direct Memory Access channels and 16 Interrupt levels.
• Four 16-bit I/O slots, and four PCI Local Bus slots.
• Battery backup for CMOS configuration and real time clock/calendar.
• 8MHz AT Bus clock & speed changeable by hardware or keyboard, CPU clock adjustable by
jumper.
• User Defined Password to inhibit illegal access.
• 2/3 Baby AT board size = 220mm(W) X 250mm(L).

Introduction
3
1.2 MAINBOARD COMPONENTS
This section gives a brief description of key components on the mainboard. Refer to Fig 1 for
component locations.
Fig 1 Key Components of the Mainboard

Chapter 1
4
1.3 PCI LOCAL BUS SPECIAL FEATURES
• PCI (Peripheral Component Interconnect) Local-Bus is the latest Local
Bus Standard that adapts the high performance and supports the future standard on the PC industry.
• Four PCI slots are provided on the mainboard support up to three Bus Master devices.
• PCI BIOS supports the PCI device configuration and fully compatible with existing drivers and
application software.
• Synchronous Bus operates in 32-bit with up to 40MHz.

Hardware Configuration
5
CHAPTER 2 HARDWARE CONFIGURATION
This chapter describes how to set the mainboard jumpers for cache memory and display type, and how to
install memory modules.
Before beginning the configuration, user should take the following precautions:
• Turn off the power supply, and unplug the power cord before begin.
• Unplug all cables that connect the mainboard to any external devices.
• In Appendix A, CPU Type Configuration Table and Voltage Selection Table are provided for
reference.
2.1 JUMPER AND MEMORY BANK LOCATIONS
Fig 2 Jumper and Memory Bank Locations

Chapter 2
6
2.2 JP4-JP17, S4-S6 - CPU TYPE CONFIGURATION
The mainboard can support different 486 processors. JP4-JP17 select CPU type and S4-S6 select the
CPU voltage. Refer to Fig 2 for the jumpers’ location, and set the jumper according to the following
table:
Table 1A: CPU Type: - 486SX (5V)
Table 1B: CPU Type: - 486DX/DX2 (5V)

Hardware Configuration
7
JP4-JP17, S4-S6--CPU Type Configuration
Table 1C: CPU Type: - SLE 486SX (5V)
Table 1D: CPU Type: - SLE 486DX/DX2 (5V)

Chapter 2
8
For 63MHz CPU clock set to 25MHz. For 83MHz CPU clock set to 33MHz
Table 1E: CPU Type: - P24T (PENTIUM OVERDRIVE PODP5V) (5V)
Table 1F: CPU Type: - P24D (486DX2 & EW5V) (5V)

Hardware Configuration
9
Table 1G: CPU Type: - P24D (486DX4 & EW3V) (3.3V)
Table 1H: CPU Type: - P24C (DX4) (3.3V)

Chapter 2
10
Table 1I: CPU Type: - Am486DX2 (3.45V)
(A80486DX2-XXNV8T)
Table 1J: CPU Type: - Am486 DX4 (3.45V)
(A80486DX4-100NV8T)

Hardware Configuration
11
For 120MHz CPU, CPU Clock Frequency = 40MHz
For 100MHz CPU, CPU Clock Frequency = 33MHz
Table 1K: CPU Type: - Enhanced Am486DX2 (3.45V)
(A80486DX2-XXSV8B)
Table 1L: CPU Type: - Enhanced Am486DX4 (3.45V)
(A80486DX4-1XXSV8B)
1XX = 100/120MHz

Chapter 2
12
For 133MHz CPU, CPU Clock Frequency = 33MHz
Table 1M: CPU Type: - Am5x86


-P75 (3.45V)
(AMD-X5-133ADW)
Table 1N: CPU Type: - Cx486S2 (5V)

Hardware Configuration
13
Table 1O: CPU Type: - Cx486DX/DX2 (5V)
Table 1P: CPU Type: - Cx486DX2-V66 (3.6V)

Chapter 2
14
Table 1Q: CPU Type: - Cx486DX2-V80 (4.0V)
Table 1R: CPU Type: - Cx486DX4-100GP4/ST 486DX4V10HS (3.45V)

Hardware Configuration
15
1XX = 100/120MHz
For 120MHz CPU, CPU Clock Frequency = 40MHz
For 100MHz CPU, CPU Clock Frequency = 33MHz
Table 1S: CPU Type: - Cx486DX4-100GP/TI486DX2-80
IBM486-4V3100GC (3.45V)
Table 1T: CPU Type: - Cx5x86-1XXGP/IBM 486-4V3100GIC (3.3V)