EFA 4DMU-HL3S
Logs
chipChipset
cpuSocket
Socket 3 (PGA237)
speedFSB speeds
20MHz25MHz33MHz40MHz50MHz
moboForm factor
Baby AT (max 220 x 330 mm)
dimDimensions
254mm x 218mm
chipCache
32KB64KB128KB256KB
ramMax RAM size
64MB
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
8x 
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

Last updated 2025-04-22T00:28:38Z
Board info score is 9.1/10
chip Chips
cpufam CPU family support
bios 3 BIOS files available

vendor AMI - 3 entries

POST string
Note
Core Ver.
BIOS Ver.
Logs
POST string
40-0100-001281-00101111-080893-UMC491F
Note
custom unlocked BIOS
Core version
080893
BIOS version
Logs
POST string
40-0100-001281-00101111-080893-UMC491F
Note
original BIOS
Core version
080893
BIOS version
Logs
POST string
40-0100-001281-00101111-080893-UMC491F
Note
Core version
080893
BIOS version
Logs
drv No drivers available
doc 3 board documents available
Release date
File
Logs
Release date
File
Logs
Release date
File
Logs
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
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 3 (deksor)
image2 Image 2 of 3 (Aublak)
image3 Image 3 of 3 (AT House)

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