IBM PS/2 MODEL 90 (8590) (Early)
Empty
20MHz25MHz33MHz50MHz60MHz66MHz
OEM / Proprietary
Empty
0B64KB128KB256KB
256MB(ECC)64MB(parity)
72-pin FPM
1x
Floppy interface
1x
PS/2 keyboard
1x
PS/2 mouse
1x
Parallel
2x
Serial
4x
32-bit MCA
1x
AVE (MCA)
Also known as:
- IBM 64F3288
- IBM 91F7467
Notes:
These systems use processor complexes, types 1-4. Only type 4 (Pentium & DX2-66) support 256MB ECC RAM. The type 3 supports 64MB ECC RAM. All support 64MB Parity RAM. Memory is interleaved and must be installed in matched pairs.
This board can be identified by having a keyboard filter at LN5 near the PS/2 port and having a notched front edge of the PCB.
Further details: https://www.ardent-tool.com/90/
Last updated 2022-04-17T18:23:52Z
Board info score is 5.1/10
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