Speak & Read

I bought a Speak and Read off ebay. There are 4 chips on the PCB: a 40-pin SDIP labeled CD2705B-N2L MES 8149 PHILIPPINES, and 3 28-pin SDIPs labeled CD2801A-N2 ME 8144 PHILIPPINES, CD2394A-NL MBU 8144 PHILIPPINES and CD2395A-NL MBU 8149 PHILIPPINES.

Here's the CD2705B die

Here's the CD2705B die with the top metal layer removed

Here's the CD2705B raw ROM dump

Speak & Read info from Datamath

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