My company "Lindley Systems" did all this from 1980 (when I was 14) until the mid 90s, in the Heathkit (later Heath/Zenith) arena. I still have master diskettes and original manuals ready for taking to the Xerox shop, and only a few years ago tossed boxes full of registration cards (with 13 cent stamps on them).
We made the transition from Heathkit HDOS to CP/M and MS-DOS but never shipped a product for MS Windows. We almost had a product ready in 1996 but then MS "upgraded" VB 3 to VB 4 and we started a rewrite, almost completed just in time for the "upgrade" to VB 5 - by which time our market had moved on.
It was a fun time to build custom and specialized hardware and software.
wlindley•44m ago
We made the transition from Heathkit HDOS to CP/M and MS-DOS but never shipped a product for MS Windows. We almost had a product ready in 1996 but then MS "upgraded" VB 3 to VB 4 and we started a rewrite, almost completed just in time for the "upgrade" to VB 5 - by which time our market had moved on.
It was a fun time to build custom and specialized hardware and software.