Full Yes SIS 486G 3.3/5V
Logs
chipChipset
cpuSocket
Socket 3 (PGA237)
speedFSB speeds
20MHz25MHz33MHz40MHz50MHz
moboForm factor
Baby AT (max 220 x 330 mm)
dimDimensions
254mm x 220mm
chipCache
64KB128KB256KB512KB
ramMax RAM size
128MB
ramRAM types
30-pin SIMM72-pin FPM
pwrPSU connector
AT (6-pin P8 + 6-pin P9)
tag Also known as
connI/O ports
1x 
AT Keyboard
cardExpansion slots
7x 
16-bit ISA
3x 
32-bit VLB
wrench 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 Notes

Missing VRM on some boards. Install one of these parts to support 3.3V 486s : Q4 - part# IRF540 or IRF520 Q5 - part# 2N2222 or TO-92 Q6 - part# LT1085CT

Last updated 2023-02-13T19:34:20Z
Board info score is 9.1/10
chip Chips
-> Chipset part
SiS 85C407 SiS 85C471
cpufam CPU family support
bios 3 BIOS files available

vendor AMI - 1 entry

POST string
Note
Core Ver.
BIOS Ver.
Logs
POST string
40-0100-001274-00101111-080893-SIS471B-F
Note
Core version
BIOS version
Logs

vendor Award - 4 entries

POST string
Note
Core Ver.
BIOS Ver.
Logs
POST string
11/28/95-SIS-85C471B/E/G-2C4I9F30
Note
Updated by Jan Steunebrink
Core version
4.50G
BIOS version
Logs
POST string
07/12/94-SIS-85C471B/E-2C4I9AD0-01
Note
Core version
4.50G
BIOS version
Logs
POST string
08/18/95-SIS-85C471B/E/G-2C4I9F32-00
Note
Core version
4.50G
BIOS version
Logs
POST string
07/28/94-SIS-85C471B/E-2C4I9F30-00
Note
Core version
4.50G
BIOS version
Logs
drv No drivers available
doc 1 board document available
Release date
File
Logs
Release date
File
Logs
Chip
Release date
File
Logs
Chip
Release date
File
Logs
Chip
Release date
File
Logs
Chip
Release date
File
Logs
Family
Release date
File
Logs
Family
Release date
1996-03
File
Logs
Family
Release date
1995-07
File
Logs
Family
Release date
1995-10
File
Logs
Family
Release date
1995-12
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
image1 Image 1 of 4 (Microhouse)
image2 Image 2 of 4 (dataino.it)
image3 Image 3 of 4 (deksor)
image4 Image 4 of 4 (dataino.it)

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