IBM 1M SIMMs for 8560 MCA card

[MykeLawson]

I have been looking on and off for some 1M SIMMs to put in my 1-8MB 16 bit MCA card for my 8560. I know these are supposed to be IBM specific based on what I've read in the various PS/2 support sites. But I've never come across the actual parts numbers for the modules to put in the board (p/n 61X6752). I think I may have found some though.... IBM Fru # 81A10900A 1x9 30pin 70ns. I can't find anything on these, so I'm not 100% sure. Anyone have any info or suggestions? Thanks

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[NeXT]

The one I'm seeing on ebay uses 9 chip SIMMS with Hitachi HM511000JP12S chips.

 

[MykeLawson]

Yep, same board I have, but I don't have any modules, and apparently those modules are 'IBM specific'. I bought four 1MB 30 pin SIMMs, parity, and 80ns, only to find out that the generic ones out there will not work. I'm trying to find IBM branded in the hopes that someone has some part number info so I have an idea if what I found might work.

 

[NeXT]

I wonder if it's doing the same thing as IBM's other early PS/2 and SCSI card ram.

Success! Convert regular SIMMs into IBM PS/2 proprietary SIMMs \ VOGONS

www.vogons.org

http://john.ccac.rwth-aachen.de:8000/misc/ps2cache/

 

[MykeLawson]

Most likely. I started to try that on one of the first ones I bought, but i couldn't get under the chips like I needed to, so I gave that approach up. I guess if I have a microscope it might have worked, but oh well....