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Conference noted::ibmpc-95

Title:IBM PCs, clones, DOS, etc.
Notice:Intro in 1-11, Windows stuff in NOTED::MSWINDOWS please
Moderator:TARKIN::LINND
Created:Mon Jan 02 1995
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:3023
Total number of notes:28404

2993.0. "SIMM id requested" by ANGST::legoe.zko.dec.com::angst.zko.dec.com::marshall () Mon Apr 21 1997 09:27

We have a pair of SIMMs made by Digital which I have not been able
to figure out.  I went through Wim Bloemendal's list but can't 
seem to match them to anything.  The DRAM's have the following
on them
          Japan ADO6NN
          9048 4100AS8
          21-32366-35
These are double sided with 9 DRAM's on each side and then one
other chip which has
          74F541D
          210A379
          9044KD

I hope I got all those small letter copied down correctly!!

Thanks,
Chris
T.RTitleUserPersonal
Name		DateLines
2993.1WRKSYS::TATOSIANThe Compleat TanglerMon Apr 21 1997 22:5811
    Is that a 30-pin SIMM?
    
    The DRAM part number maps to CMOS DRAM 80NS 4MX1 FAST PG 20P/350 SOJ,
    produced by Hitachi. Unfortunately, nothing shows up on the "Where
    Used" list.
    
    With 18 of these on a SIMM it seems probable that you have an 8MByte
    "X9" 30-pin SIMM. What the octal line driver (74F541) is doing there is
    anybody's guess...
    
    /dave
2993.2...= MS01-CA, 8MB for DECstation5000/100JGODCL::BLOEMENDALWim, JGO B-1/06, 889-9364Tue Apr 22 1997 04:0322
>We have a pair of SIMMs made by Digital which I have not been able
>to figure out.  I went through Wim Bloemendal's list but can't 
>seem to match them to anything.  

Well, if you mention my name, I'm obliged to answer.... :-)

>The DRAM's have the following
>          21-32366-35
  This seem a DEC P/N, which would be a 4Mx1 DRAM, 80ns ...!!

>These are double sided with 9 DRAM's on each side and then one
>other chip which has
>          74F541D

Which is a 8 bits buffer chip.

So this makes it a 80(!) pin SIMM, 8MB, called MS01-CA and was/is used on PMAX,
(DEC station 5000/100 as far as I remember. (Well actually it was my
collegeague Coen Centen who remembered this all... and suddenly realizes how
long it already has been with DEC... :-))

  _Wim_
2993.3They are 80 pin!!ANGST::legoe.zko.dec.com::angst.zko.dec.com::marshallTue Apr 22 1997 08:535
Counting the pins, they do have 80!!  I guess these are not going to be
very useful with a PC.

thanks,
Chris