4 ms·
The 8080 was brought to market in April 1974 and it’s not unrealistic to assume that preliminary information on instruction encodings etc. was available earlier
by johndoe0815 3y ago
The 8080 was brought to market in April 1974 and it’s not unrealistic to assume that preliminary information on instruction encodings etc. was available earlier.
The 8008 would have been available already, but it was not binary compatible. However, an assembly translator was available (similar to the latter one translating 8080 asm to 8086).
So the question is if Allen wrote a binary emulator or perhaps something that interpreted asm source code? Maybe the emulator code is still hiding somewhere in the Microsoft archives… :)
- johndoe0815 3y agoSome background (and a bit of speculation) can be found in this retrocomputing StackExchange topic: https://retrocomputing.stackexchange.com/questions/4984/how-was-the-traf-o-data-8008-simulator-developed https://retrocomputing.stackexchange.com/questions/4984/how-... And a bit more about the PDP10 macro assembler that was used (also for 6502 BASIC) at Michael Steil's site: https://www.pagetable.com/?p=774 https://www.pagetable.com/?p=774