DFI 486-33/50UCE, 486DX2-50UCE
chipChipset
cpuCPU socket
Empty
speedFSB speeds
25MHz33MHz50MHz
moboForm factor
Baby AT (max 220 x 330 mm)
dimDimensions
330mm x 220mm
chipCache
64KB128KB256KB
ramMax RAM size
32MB
ramRAM type
30-pin SIMM
pwrPSU connector
AT (P8-P9)
connI/O ports
1x 
AT Keyboard
cardExpansion slots
5x 
16-bit ISA
3x 
8-bit ISA

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:

486SX: J6 2-3; J7 open 486DX: J6 1-2, 3-4; J7 closed JP7 open (default) runs the system bus at 1:1 the oscillator. With it closed, it runs at 1:2 the oscillator (divided in half) so a 32MHz osc gives 16MHz, etc.

Last updated 2023-12-02T22:52:59Z
Board info score is 8.4/10
3 files available

Vendor: Mr. BIOS [1 entry]

POST string
Note
Core Ver.
BIOS Ver.
Logs
POST string
UMC_402
Note
Core version
1.65
BIOS version
Logs

Vendor: AMI [2 entries]

POST string
Note
Core Ver.
BIOS Ver.
Logs
POST string
40-0100-ZZ1211-00101111-070791-U480A/2
Note
Core version
070791
BIOS version
Logs
POST string
40-0100-ZZ1211-00101111-070791-UMC480A
Note
Core version
070791
BIOS version
Logs
drv No drivers available

Disclaimer

The info found in this page might not be entirely correct. Check out this guide to learn how you can improve it.