Jean Parrot -> August Abolins said..

 AA>> I programmed in pure machine language (1's and 0's) for a
 JP> computer line called the Macrodata. The commands were in
 JP> octal. I developed a AA> reverse-compiler for it to help me
 JP> debug.

 AA>> I also worked with 68000, 6800, and 6500 series of
 JP> microprocessors, but AA> thankfully I could work with assembly
 JP> language (op-codes) and avoid the AA> 1's and 0's.

 JP> Did you work on the Z80 at all ?

Not directly.  I remember buying a Z80 programming book from Radio Shack to
get exposed to the mysteries.  The Macrodata programming was very similar. 
I was eventually dreaming and thinking in octal.

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