Gigabyte GA-486IM
chipChipset
cpuCPU socket
speedFSB speeds
25MHz33MHz40MHz50MHz
moboForm factor
Baby AT (max 220 x 330 mm)
dimDimensions
254mm x 218mm
chipCache
32KB64KB128KB256KB512KB1MB
ramMax RAM size
128MB
ramRAM type
72-pin FPM
pwrPSU connector
connI/O ports
1x 
AT Keyboard
cardExpansion slots
4x 
16-bit ISA
4x 
32-bit PCI
2x 
32-bit VLB

Known issues:

  • DALLAS RTC coin cell empty

The motherboard's Real-Time Clock (RTC) chip contains a coin cell that may have drained, causing the loss of CMOS settings. This can result in an inability to save settings, causing system instability or failure to boot. To fix this, the RTC chip can be replaced with an equivalent or repaired by cutting into it and soldering on a new external coin cell holder. Replacement guides are available at https://github.com/necroware/nwX287 or https://github.com/necroware/nw12887, depending on the actual chip used.

Notes:

BIOS has PCI IRQ problems.

User reports say that the BIOS from the ALIC 486UP can be used to add support for 4 IDE hard disks (https://theretroweb.com/motherboards/s/alic-486up) - Proceed with caution!

Last updated 2023-10-14T18:12:22Z
Board info score is 9.2/10
cpuCPU family support
4 files available

Vendor: Award [4 entries]

POST string
Note
Core Ver.
BIOS Ver.
Logs
POST string
12/05/94-UMC-881/886-2A4X5G01-00
Note
Core version
4.50G
BIOS version
Logs
POST string
12/05/94-UMC-881/886-2A4X5G01-00
Note
1. Support LBA 2. Support AMD DX4-100 3. 486VS/VF does not have a flash BIOS
Core version
4.50G
BIOS version
Logs
POST string
12/23/94-UMC-881/886-2A4X5G01-00
Note
Core version
4.50G
BIOS version
Logs
POST string
08/18/94-UMC-881/886-2A4X5G01-00
Note
Core version
4.50G
BIOS version
Logs
drv No drivers available
doc 2 board documents available
Release date
File
Logs
Release date
File
Logs
Release date
File
Logs

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