==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.
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CONNECTIONS
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Purpose Location Purpose Location
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External battery JP1 Power LED + keylock JP20
Reset switch JP17 Speaker JP21
Turbo LED JP18 Weitek 4167 connector W1
Turbo switch JP19
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USER CONFIGURABLE SETTINGS
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Function Jumper Position
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* Monitor type color JP2 Closed
Monitor type monochrome JP2 Open
* Gate type fast A20 JP3 1 + 2
Gate type keyboard A20 JP3 2 + 3
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DRAM CONFIGURATION
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Size Bank 0 Bank 1
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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
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CACHE CONFIGURATION
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Size Bank 0 Bank 1 TAG
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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
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CACHE JUMPER WRITE-THROUGH CONFIGURATION
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Size JP4 JP6 JP11 JP12 JP13
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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
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CACHE JUMPER WRITE-BACK CONFIGURATION
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Size JP7 JP8 JP9 JP10
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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
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CPU TYPE CONFIGURATION
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Type JP14 JP15 JP16
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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
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CPU SPEED CONFIGURATION
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Speed JP5
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20MHz 1 + 2 closed
25MHz 2 + 3 closed
33MHz 1 + 2 closed
50iMHz 2 + 3 closed
========================END OF DATA FOR M423============================
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