Hello Roy,

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

Your list...

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

Additions from the SIMMs in front of me...

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

(1) http://www.electrospec-inc.com/cross_references/ic_crossref.asp (3)
Guess based on numbers

Good luck,
  - Andy Ball.

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