Andy Ball wrote in a message to Roy J. Tellason:

 AB> Hello Roy,

 AB> Here's my 'best guess' as to the nature of some of the chips that 
 AB> you mentioned. I've not looked any of this up with the 
 AB> manufacturers' data sheets, so the following should be taken with a
 AB> pinch of salt...

Ok.

 AB> Your list...

 AB>   41000J7 (GSM)             1M x 1 bit 70nS DRAM?     (3)
 AB>   4217100-70 (NEC)
 AB>   424256-70 (NEC)           256K x 4 bit DRAM (70nS?) (1)
 AB>   MM514400N-06              1M x 4 bit 60nS DRAM ?
 AB>   EC5004042E-60
 AB>   GM71C4400AJ70 (Goldstar)  1M x 4 bit DRAM (70nS?)   (1)
 AB>   GS81C4100370 (GSM)        4M x 4 bit DRAM 70nS?     (3)
 AB>   HMS11000AS7 (Hitachi)     1M x 1 bit DRAM 70nS?     (3)
 AB>   KM44C100J-6 (Samsung)
 AB>   KM44C256AJ (Samsung)      256K x 4 bit DRAM         (1)
 AB>   M511000A (OKI)            1M x 1 bit DRAM           (1)
 AB>   M514256A-80J (OKI)        256K x 4 bit DRAM (80nS?) (1)
 AB>   M5M4256AJ (Mitsubishi)    256K x 1 bit DRAM         (1)
 AB>   M5M44256BJ (Mitsubishi)   256K x 4 bit DRAM         (1)
 AB>   MM514400N-06              1M x 4 bit DRAM (60nS?)   (1)
 AB>   MT4C4M481DJ
 AB>   TC55V328SJ-15 (Toshiba)
 AB>   TMS417400ADJ (TI)         4M x 4 bit DRAM FPM 2KHz  (1)
 AB>   TMS41709ADJ
 AB>   UM61M256k-15
 AB>   UM61 3232AF-7
 AB>   W24257AK-15

 AB> Additions from the SIMMs in front of me...

 AB>   AAA4M204J-06A             1M x 4 bit DRAM 60nS?     (3)
 AB>   81C1000A-60               1M x 1 bit DRAM 60nS?     (3)
 AB>   424400-70                 1M x 4 bit DRAM (70nS?)   (1)
 AB>   V53C404HK60               1M x 4 bit DRAM 60nS?     (3)

Cool.

 AB> (1) http://www.electrospec-inc.com/cross_references/ic_crossref.asp

Sounds like a site I'll probably have to check out,  when I can.

 AB> (3) Guess based on numbers

No (2)?  :-)

I get a good list of those parts going,  I'll pretty it up and either post
it or make it available as a file.

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