GSI, INC. MODEL 21
Logs
typeType
Floppy controller IDE controller
interfaceInterface
connectorSlot connector
16-bit ISA
signalSlot signals
16-bit ISA
dimSlot height
1
datePCI ID
Empty
fccFCC ID
Empty
dimDimensions
Empty
tag Also known as
portintI/O ports
2x 
  • 2x17 2.54mm pin header
1x 
  • 2x20 2.54mm pin header
powerPower connectors
Empty
wrench Known issues
  • ROM Corruption

This device is known for occasionally corrupting its configuration EEPROM. This may lead to the card malfunctioning or not being detected, or even the system refusing to boot. The 'BIOS/Firmware' section may have a dump of this EEPROM that can be used to restore functionality.

notes Notes

It is advised that users of this card back up the BIOS ROM before installing the card in a new system, as from experimentation it appears that the ROM's method of writing configuration parameters to itself can cause the ROM checksum to be written incorrectly. As an alternative, the XUB (XTIDE Universal BIOS) or Sergey's XT-FDC/Quad Floppy BIOS are recommended depending on use case.

Last updated 2025-03-04T01:11:35Z
chip Chips
chip Specs

Additional specifications:

MTL
Size: Half-length, half-height card
Data bus: 16-bit, ISA
Hard drive supported: Two IDE (AT) Interface drives
Floppy drives supported: Four 360KB, 720KB, 1.2MB, 1.44MB, or 2.88MB drives
bios 2 card BIOS files available
Version
Note
File
Logs
Version
2.05
Note
File
Logs
Version
1.15
Note
File
Logs
drv No drivers available
doc 1 card document available
Release date
File
Logs
Release date
1991
File
Logs
Chip
Release date
File
Logs
Chip
Release date
1994-05
File
Logs
Chip
Release date
1991-05
File
Logs
Chip
Release date
1992-09
File
Logs
image1 Image 1 of 2 (TheMajorTechie)
image2 Image 2 of 2 (TheMajorTechie)

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