IBM ROM Images

These are binary image files of some of the more sought-after late revision PS/2 Micro Channel ROMs, suitable for use with most EPROM programmers. They are provided as is, without any guarantee or warranty of any kind; use at your own risk. All files are compressed with PKZIP 2.04G.

Also see David Beem's IBM SCSI Microcode Collection.

File Size Description
61G2976 64 KB Microcode 61G2977 Revision 0026, 1993, for PS/2 Caching SCSI controller. 27C512
92F2244 32 KB BIOS 92F2246, 1991, for PS/2 Caching SCSI controller. Needs 92F2245 also. 27C256
92F2245 32 KB BIOS 92F2247, 1991, for PS/2 Caching SCSI controller. Needs 92F2244 also. 27C256
FD700M77 8 KB IBM BIOS v1.01 for Future Domain MCS-700 card used in PS/2 Model 77s. 27C64
MCS700.361 8 KB Future Domain MCS700 v3.61. 27C64
25H3518 16 KB IBM LAN Adapter/a For Ethernet (Sonic-T chipset) v2.2. 27C128
52G9509 128 KB Model 90/95xp 486 Type 1 Processor Complex
41G9361 128 KB Model 90/95xp 486 Type 2 Processor Complex, courtesy of Tim Clarke.
04G3759 16 KB IBM ESDI Attachment ECA Microcode
SVGA141 32 KB IBM Cirrus 5428 1 MB short SVGA/A BIOS v1.41. 27C256 32-pin PLCC
CL28 32 KB Japanese IBM 5428 SVGA/A BIOS v1.41. 2 MB Capable? Thanks to T. Sunagawa.


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