ABit AB-AN4R2
chipChipset
cpuSocket
Socket 3 (PGA237)
speedFSB speeds
20MHz25MHz33MHz50MHz
moboForm factor
Baby AT (max 220 x 330 mm)
dimDimensions
330mm x 218mm
chipCache
128KB256KB512KB
ramMax RAM size
128MB
ramRAM types
30-pin SIMM72-pin FPM
pwrPSU connector
AT (P8-P9)
connI/O ports
1x 
AT Keyboard
cardExpansion slots
6x 
16-bit ISA
3x 
32-bit VLB

Also known as:

Known issues:

  • Leaky Ni-Cd clock battery

The Ni-Cd battery may be leaking, risking damage to PCB layers & nearby components. Promptly remove the battery & clean corrosion/alkaline salts from the board. Use white vinegar to dissolve salts, but exercise caution as vinegar can corrode exposed metals. A thorough examination & repair may be needed. Replace battery with guide: https://github.com/wiretap-retro/Not-A-Varta

Notes:

Only the AN4T R2 supports 486DX4 CPUs, this version does not!

Last updated 2023-09-01T15:40:48Z
Board info score is 9.1/10
chipChipset parts
SiS 85C407 SiS 85C471
cpuCPU family support
2 files available

Vendor: AMI [1 entry]

POST string
Note
Core Ver.
BIOS Ver.
Logs
POST string
40-E8FI-001247-00101111-121593-SIS471-H
Note
Core version
121593
BIOS version
Logs

Vendor: Award [1 entry]

POST string
Note
Core Ver.
BIOS Ver.
Logs
POST string
08/30/95-SIS-85C471E/G-2C4I9A12-02
Note
Core version
4.50G
BIOS version
Logs
drv No drivers available
doc 2 board documents available
Release date
File
Logs
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File
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File
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Chip
Release date
File
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Chip
Release date
File
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Chip
Release date
File
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Chip
Release date
File
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Family
Release date
File
Logs
Family
Release date
1989-04
File
Logs
Family
Release date
1990
File
Logs
Family
Release date
1992-10
File
Logs
Family
Release date
1992-02
File
Logs

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