Air 486MI Manuel utilisateur
PREFACE
Thank you for purchasing the 486MI system board. This document gives
an aid to the configuration and installation of this system board.
The information in this document is subject to change without notice.
This document contains information protected by copyright. ll rights are
reserved. No part of this document may be used or reproduced in any
forms or by any means, or stored in a database or retrieval system,
without prior written permission.
TRADEMARKS
Intel is a registered trademark of Intel Corporation.
IBM is a registered trademark of International Business Machines
Corporation.
Microsoft is a registered trademark of Microsoft Corporation.
VES is a registered trademark of Video Electronics Standard
ssociation.
ll other trademarks used in this manual are the property of their
respective owners.
486MI System Board User's Manual Page 1
TABLE OF CONTENTS
CHAPTER 1: INTRODUCTION 4
CHAPTER 2: JUMPERS & CONNECTORS 6
SYSTEM BOARD JUMPERS 6
CPU External Cl ck Jumpers 8
CPU Type Jumpers 8
Cache Size Jumpers 9
VESA L cal Bus Jumper 9
Clear CMOS Data Jumper 10
Display Type Jumper 10
FLASH BIOS Jumper 11
IDE P rt Jumpers 12
Parallel P rt Jumper 12
SYSTEM BOARD CONNECTORS 13
Green PC C nnect rs 13
P wer Supply C nnect rs 14
Keyb ard C nnect r 15
P wer LED and Keyb ard L ck C nnect r 15
Speaker C nnect r 16
Reset C nnect r 16
Turb Switch C nnect r 17
Turb LED C nnect r 17
Parallel P rt C nnect r 18
Serial P rt 1 & 2 C nnect rs 18
Fl ppy Interface C nnect r 19
IDE Interface C nnect r 20
Harddisk Activity LED C nnect r 20
CHAPTER 3: HARDWARE INSTALLATION 21
THE DRAM SIMMs 21
Installing DRAM SIMMs 22
INSTALLING A VL-BUS CARD 23
EQUIPMENT REQUIRED 24
CHAPTER 4: BIOS SETUP 25
ENTERING SETUP 25
STANDARD CMOS SETUP 27
ADVANCED CMOS SETUP 28
POWER MANAGEMENT SETUP 32
AUTO CONFIGURATION - BIOS DEFAULTS 32
AUTO CONFIGURATION - POWER-ON DEFAULTS 32
CHANGE PASSWORD 33
AUTO DETECT HARD DISK 34
HARD DISK UTILITY 34
WRITE TO CMOS AND EXIT 34
DO NOT WRITE TO CMOS AND EXIT 34
CHAPTER 5: VL-BUS IDE DRIVERS 35
Page 2 486MI System Board User's Manual
DOS DRIVER INSTALLATION 35
WINDOWS 3.1 DRIVER INSTALLATION 35
CHAPTER 6: KEYBOARD HOT KEYS 37
SYSTEM SPEED 37
SYSTEM SECURITY LOCKING 37
SYSTEM POWER DOWN MODE 37
PASSWORD STATE 38
APPENDIX A: AMI BIOS HARD DISK TYPE 39
APPENDIX B: MEMORY MAPPING 40
APPENDIX C: AT I/O ADDRESS MAP 41
APPENDIX D: INTERRUPT ASSIGNMENTS 43
APPENDIX E: SPECIFICATION 44
486MI System Board User's Manual Page 3
CHAPTER 1: INTRODUCTION
The 486MI system board adds to our 486 product line high integration
and cost effective solution without compromising performance and
quality. With top speed at 50MHz and integrated 64K/128K/256K Write-
Back cache, the 486MI dramatically boosts system throughput for even
the most demanding applications. The 486MI offers features and
functionality exceeding any other system board in its class, including:
CPU:
·Intel i486DX, i486DX2, i486SX, i487SX, P24T, and Overdrives.
Cache Memory:
·Supports 64K/128K/256K/512K cache memory.
Main Memory:
·Supports 512Kx36, 1Mx36, 2Mx36, 4Mx36, and 8Mx36 72-pin SIMM
modules.
·Up to 64 MBytes on-board memory.
S ots:
·Three 32-bit VES Local Bus (VL-Bus) slots. ll slots support Bus
Master operation.
·Seven 16-bit IS bus slots.
IDE Port:
·Turbo/Normal selections for fast or slow IDE hard drives.
·Plug and play, replaces any non-intelligent IDE controller without
reformatting the disk drives.
·Software drivers are not required for all operating systems.
Page 4 486MI System Board User's Manual
F oppy Disk Contro er:
·Fully IBM register set compatible.
·Supports up to two 3.5-inch or 5.25-inch floppy disk drives.
·Supports 360KB / 720KB / 1.2MB / 1.44MB densities.
·Floppy Disk Controller can be disabled.
Periphera s:
·Supports two Serial ports, one Parallel port and one Game port.
Green PC:
·CPU clock-slow-down and monitor shut-down features.
On-Board Battery:
·3.6V/60m on-board battery.
486MI System Board User's Manual Page 5
CHAPTER 2: JUMPERS & CONNECTORS
When working with the 486MI, it
is extreme y important that you
avoid static e ectricity. A ways
ground yourse f by wearing a
wrist or ank e strap.
Figures 1 on the next page shows the component layout of the 486MI
system board with locations of the system board jumpers and
connectors. Note that most jumpers and connectors on the system board
are labeled with proper names with pin 1 marked as '1'. To avoid
damaging the board and to have proper operation caution should be
taken when connecting these components.
SYSTEM BOARD JUMPERS
Jumpers are used to select between various operating modes. jumper
switch consists of two, three, or four gold pins projecting from the system
board. Placing the plastic jumper cap over two pins connects those pins
and makes a particular selection. Using the cap to cover two pins in this
way is referred to as shorting those pins. If the cap is not placed on any
pins at all, this is referred to as leaving the pins open.
Note: When you open a jumper, leave the plastic jumper cap attached
to one of the pins so you don't lose it.
Page 6 486MI System Board User's Manual
FIGURE
486MI System Board User's Manual Page 7
CPU Externa C ock Jumpers
If you are installing an i486DX or i486SX, the internal CPU clock speed is
the same as the external CPU clock speed. This is different for i486DX2
CPU where the external speed is one-half of the internal speed. For
example, a 486DX2-66 has an external clock speed of 33MHz.
Externa
C ock
Speed
JP5
JP6 JP7 ID3 JP26 JP27 JP28
20MHz SHORT OPEN OPEN 1-2 2-3 2-3 1-2
25MHz OPEN SHORT SHORT 1-2 2-3 2-3 1-2
33MHz OPEN SHORT OPEN 1-2 2-3 2-3 1-2
40MHz OPEN OPEN SHORT 2-3 1-2 1-2 2-3
50MHz OPEN OPEN OPEN 2-3 1-2 1-2 2-3
CPU Type Jumpers
CPU Type JP1 JP2
486DX, 486DX2 1-2 1-2, 3-4
487SX, ODP486SX 2-3 1-2, 3-4
486SX OPEN 2-3
Care should be taken when installing the CPU into the Pin Grid rray
(PG ) socket on the system board. Make certain that pin 1 of the CPU
chip is correctly aligned with pin 1 of CPU socket. The location of pin 1
on the CPU is denoted by a small notch.
Page 8 486MI System Board User's Manual
Cache Size Jumpers
The system board supports 64KB/ 128KB/ 256KB/ 512KB of cache
memory.
Cache Size Jumper Selecti n
Cache
Size
JP10 JP11 JP12 JP13 JP14 JP15
64KB 1-2 1-2 1-2 2-3 1-2 1-2
128KB 2-3 1-2 1-2 1-2 1-2 2-3
256KB 2-3 2-3 1-2 2-3 2-3 2-3
256KB 2-3 2-3 2-3 1-2 1-2 2-3
Cache Size and SRAM L cati ns
Cache
Size
Tag RAM
U14
Data Bank 0
U19,U20,
U21,U22
Data Bank 1
U23, U24,
U25, U26
64KB 8Kx8 8Kx8 8Kx8
128KB 32Kx8 32Kx8 None
256KB 32Kx8 32Kx8 32Kx8
512KB 32Kx8 128Kx8 None
VESA Loca Bus Jumper
Jumper ID2 allows any VL-Bus adapter to identify the speed of the
system board.
High Speed Write ID2
System board runs one wait state write
transfer. ll VL-Bus adapters can operate
in this mode.
2-3
(Default)
System board runs zero wait state write
transfer. Some VL-Bus adapters may not
be able to run this mode.
1-2
486MI System Board User's Manual Page 9
C ear CMOS Data Jumper
The CMOS jumper JP20 is used to clear the system configuration data
currently stored in the CMOS R M. ll system setup information (hard
disk type, date/time, etc...), stored in the CMOS, will be destroyed. This
function would be useful if you were to forget the user password for the
system.
Function JP20
Normal CMOS Operation 1-2
(Default)
Clear CMOS Data 2-3
Follow these steps to clear CMOS data:
1. Turn power OFF.
2. Open the system cover and gain access to jumper JP20.
3. Change jumper JP20 to 2-3 position for few seconds then move the
jumper block back to 1-2 position again.
4. Replace and secure the system cover.
5. Turn power ON, CMOS data should be cleared.
Disp ay Type Jumper
Disp ay Type JP16
Video display is VG , EG , or
Monochrome.
OPEN
(Default)
Video display is CG . SHORT
Page 10 486MI System Board User's Manual
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