Full Yes SIS 486G 3.3/5V
chipChipset
cpuCPU socket
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 (P8-P9)
connI/O ports
1x 
AT Keyboard
cardExpansion slots
7x 
16-bit ISA
3x 
32-bit VLB

Also known as:

  • Full Yes SIS 486G 3.3/5V Ver:E

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:

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
3 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
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