Sigma unknown (486/OPTi local bus)
chipChipset
cpuSockets
WTL4167 (PGA144) Socket 1 (PGA169)
speedFSB speeds
20MHz25MHz33MHz50MHz
moboForm factor
Baby AT (max 220 x 330 mm)
dimDimensions
Empty
chipCache
64KB256KB
ramMax RAM size
32MB
ramRAM type
30-pin SIMM
pwrPSU connector
AT (P8-P9)
connI/O ports
1x 
AT Keyboard
cardExpansion slots
7x 
16-bit ISA
1x 
OPTi Local Bus

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:

uses the OPTi slot for a memory card

Last updated 2023-02-28T00:33:16Z
Board info score is 5.9/10
cpuCPU family support
0 files available
drv No drivers available
doc No board documents available
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

Disclaimer

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