I'm an MCA freak and have a good majority of the PS/2 models. The 
IBM internal SCCI connector was 50pin and some models had 
onboard SCSI as you likely know.
 I checked my archives and got this from an MCA AboveBoard thread 
I culled from the PS/2 newsgroup. No mention in the thread about a 
50pin connector tho. Mainly about getting the memory recognized. 
The memory chips were as you describe.
 
ftp://download.intel.com/enduser_reseller/above_board_memory_boar
ds/abmc.exe
Includes the SOFTSET.exe utility
 It came up blank and the archive no longer had the enduser_reseller 
folder. Some zealous employee must have seen the reseller title and
deleted it. Blast !! That means the Softset.exe is also likely gone. 
> I have an MCA board here (probably pulled from a PS/2, but I really am
> not sure where it came from). 
> 
> Its marked as an Intel Above Board MC. And currently has 8 30 pin SIMMS
> on it (1 MB each it looks like). From what I can find, I think this is
> just a normal above board memory expansion card (max 32 MB?)
 Most early PS/2s had a 16MB limit from the 8580 on, but there were 
workarounds. 
> 
> However, there is also a 50 pin IDC connector on it. Is that for 
> connecting to a daughter card? I just want to confirm that fact, and
> that this isn't really some kind of a SCSI controller with a nice buffer
> on it. I thought the Above Boards were just memory cards, but you never
> know. (maybe if I could find something about them on Intel's site... but
> their AboveBoards support section seems to have vanished)
> 
> -chris
> <http://www.mythtech.net>
> 
Lawrence
lgwalker_at_mts.net
bigwalk_ca_at_yahoo.com
Received on Mon Nov 18 2002 - 16:31:34 GMT