Look at what I found on github! CP/M-65 the 1977 CPM ported to the 6502 processor:
https://github.com/davidgiven/cpm65
https://github.com/davidgiven/cpm65
CP/M-65
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Hmm, as I recall Commodore had a version of CP/M for the C128... but now that I think of it, it probably had two CPUs in it, a 6510 and a Z80. https://en.wikipedia.org/wiki/Commodore_128#CP/M yep.
So this would have been very helpful to Commodore almost 40 years ago. ;-)
So this would have been very helpful to Commodore almost 40 years ago. ;-)
I skipped CP/M, though a friend had it. I was working on IBM 3080 mainframes at the time.Thought these little computers were toys. Soon after, like 1983, my employer plopped an IBM 3270 PC on my desk -- that's an IBM PC with a 3270 video adapter and software to allow it to be simultaneously used as a 3278 and a PC. That's when I became hooked. Wrote my first 8088 assmembler program that year. For an IBM mainframe assembler programmer the 8088 assembler was like a time warp back into the stone age.
The Intel instruction set still suffers from that legacy. What could be done in say ten IBM S/360 or S/370 instructions took three times as many instructions on Intel. I recall writing parsers in IBM mainframe assembler using a translate table and a branch table. No such elegance was possible in the Intel world.
BTW, haven't worked on IBM mainframe for 25 years. UNIX now.
The Intel instruction set still suffers from that legacy. What could be done in say ten IBM S/360 or S/370 instructions took three times as many instructions on Intel. I recall writing parsers in IBM mainframe assembler using a translate table and a branch table. No such elegance was possible in the Intel world.
BTW, haven't worked on IBM mainframe for 25 years. UNIX now.
I started my professional career programming IBM S/360 and S/370 in BAL, COBOL and RPG in the early to mid-70s. I still remember using the Panvalet storage library and the IEBxxxxx series of utilities.
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