Chicony CH-491E
chipChipset
cpuCPU socket
Socket 3 (PGA237)
speedFSB speeds
20MHz25MHz33MHz40MHz50MHz
moboForm factor
Baby AT (max 220 x 330 mm)
dimDimensions
220mm x 250mm
chipCache
32KB64KB128KB256KB
ramMax RAM size
64MB
ramRAM type
30-pin SIMM
pwrPSU connector
AT (P8-P9)
connI/O ports
1x 
AT Keyboard
cardExpansion slots
7x 
16-bit ISA
3x 
32-bit VLB

Also known as:

  • Chicony 001-00486-B18

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

Last updated 2023-10-04T08:54:35Z
Score is 9.3/10
chipsetChipset
chipChipset parts
UMC UM82C491 UMC UM82C493
cpuCPU family support
1 file available

Vendor: AMI [2 entries]

POST string
Note
Core Ver.
BIOS Ver.
Last edit
POST string
40-0003-001116-00101111-080893-UMC491-E
Note
Core version
080893
BIOS version
Last edit
pwr 1970-01-01
POST string
40-0102-001116-00101111-040493-UMC491F
Note
Core version
040493
BIOS version
Last edit
pwr 2020-11-22
drv No drivers available
doc 2 board documents available
Language
Release date
File
Last edit
Language
English
Release date
File
Last edit
pwr 1970-01-01
Language
English
Release date
File
Last edit
pwr 2022-09-19
chipdoc 2 chip documents available
Chip
Language
Release date
File
Last edit
Chip
Language
English
Release date
File
Last edit
pwr 2023-10-14
Chip
Language
English
Release date
File
Last edit
pwr 2023-10-14

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