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whobretoday at 10:37 AM2 repliesview on HN

In 1981, one could write a z80 assembly program for cp/m and it would run on thousands of different computer models.


Replies

pjmlptoday at 11:23 AM

As someone that was alive back then already, only if you never touched the hardware directly outside the CPU.

Even the PC clones didn't had something like portable Assembly if you ventured outside 0x10h and 0x21h interrupts.

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steve1977today at 11:05 AM

of different CP/M computer models though, no?