AMIBIOS ID String 40-0300-001437-00101111-121291-PC-CHIPS-8

- AMIBIOS ID String 40-0030-001437-00101111-121291-PC-CHIP-F
- 8-30 pin SIMM slots (1-32meg FPM DRAM)
- 2-32bit EISA slots (brown)
- 4-16bit ISA slots (black
- 1-8bit XT slot
- 32k-256k CACHE support in 8-28pin sockets + 1 TAG RAM socket
- AMI/AWARD Bios.
- PC Chips 16329/8 chipset
- Weitek 4167 co-processor support.
- One PGA 239pin CPU socket which supports these processors:
INTEL 80486SX/SX2,80486DX/DX2
- Supports speeds of 20/25/33/40/50 MHz.
- Manufactured by: PC-Chips and ILON USA Inc.

==View or Print jumper settings using Fixedsys or New Courier fonts==

M-423 486 ISA Motherboard

- BIOS ID String ???????????? <---- please send yours in
- AMIBIOS ID String 40-0300-001437-00101111-121291-PC-CHIPS-8
- 8-30 pin SIMM slots (1-32meg FPM DRAM)
- 2-32bit EISA slots
- 4-16bit ISA slots
- 1-8bit ISA slot
- 32k-256k CACHE support in 8-28pin sockets + 1 TAG RAM socket
- AMI/AWARD Bios.
- PC Chips 16329/8 chipset
- Weitek 4167 co-processor support.
- One PGA 239pin CPU socket which supports these processors:
INTEL 80486SX/SX2,80486DX/DX2
- Supports speeds of 20/25/33/40/50 MHz.
- M423 Manufacturer by ILON USA Inc.
------------------------------------------------------------------------
CONNECTIONS
------------------------------------------------------------------------
Purpose Location Purpose Location
------------------------------------------------------------------------
External battery JP1 Power LED + keylock JP20
Reset switch JP17 Speaker JP21
Turbo LED JP18 Weitek 4167 connector W1
Turbo switch JP19
------------------------------------------------------------------------
USER CONFIGURABLE SETTINGS
------------------------------------------------------------------------
Function Jumper Position
------------------------------------------------------------------------
* Monitor type color JP2 Closed
Monitor type monochrome JP2 Open
* Gate type fast A20 JP3 1 + 2
Gate type keyboard A20 JP3 2 + 3
------------------------------------------------------------------------
DRAM CONFIGURATION
------------------------------------------------------------------------
Size Bank 0 Bank 1
------------------------------------------------------------------------
1MB (4) 256K x 9 None
2MB (4) 256K x 9 (4) 256K x 9
4MB (4) 1M x 9 None
5MB (4) 256K x 9 (4) 1M x 9
8MB (4) 1M x 9 (4) 1M x 9
16MB (4) 4M x 9 None
20MB (4) 1M x 9 (4) 4M x 9
20MB (4) 4M x 9 (4) 1M x 9
32MB (4) 4M x 9 (4) 4M x 9
------------------------------------------------------------------------
CACHE CONFIGURATION
------------------------------------------------------------------------
Size Bank 0 Bank 1 TAG
------------------------------------------------------------------------
32KB (4) 8K x 8 NONE (1) 8K x 8
64KB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8
128KB (4) 32K x 8 NONE (1) 8K x 8
256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8
------------------------------------------------------------------------
CACHE JUMPER WRITE-THROUGH CONFIGURATION
------------------------------------------------------------------------
Size JP4 JP6 JP11 JP12 JP13
------------------------------------------------------------------------
32KB 2 + 3 2 + 3 2 + 3 2 + 3 2 + 3
64KB 1 + 2 2 + 3 1 + 2 1 + 2 2 + 3
128KB 1 + 2 1 + 2 1 + 2 1 + 2 1 + 2
256KB 2 + 3 1 + 2 1 + 2 1 + 2 1 + 2
------------------------------------------------------------------------
CACHE JUMPER WRITE-BACK CONFIGURATION
------------------------------------------------------------------------
Size JP7 JP8 JP9 JP10
------------------------------------------------------------------------
32KB 1 + 2 2 + 3 2 + 3 2 + 3
64KB 2 + 3 2 + 3 2 + 3 1 + 2
128KB 2 + 3 2 + 3 1 + 2 2 + 3
256KB 2 + 3 1 + 2 2 + 3 2 + 3
------------------------------------------------------------------------
CPU TYPE CONFIGURATION
------------------------------------------------------------------------
Type JP14 JP15 JP16
------------------------------------------------------------------------
80486SX 2 + 3 Open 2 + 3 closed
80487SX 1 + 2 2 + 3 1 + 2, 3 + 4
80486DX 1 + 2 1 + 2 1 + 2, 3 + 4
80486DX2 1 + 2 2 + 3 1 + 2, 3 + 4
------------------------------------------------------------------------
CPU SPEED CONFIGURATION
------------------------------------------------------------------------
Speed JP5
------------------------------------------------------------------------
20MHz 1 + 2 closed
25MHz 2 + 3 closed
33MHz 1 + 2 closed
50iMHz 2 + 3 closed
========================END OF DATA FOR M423============================