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Didn't Microsoft buy DOS to make MS-DOS?
by kgc 10y ago
Didn't Microsoft buy DOS to make MS-DOS?
- rando444 10y agoBill Gates licensed something called QDOS which was made by Tim Paterson at Seattle Computer Products, which Tim had designed to mimick CP/M's API.
- cptskippy 10y agoI heard somewhere that he bought a CP/M manual at RadioShack and based much of his work off of that.
- rbanffy 10y agoIIRC, a lot, if not all, of CP/M was written in PL/M, but the 8086 was designed to make porting assembly code from the 8080/8085 easy, so, I'd assume a disassembly would be easy to automatically port to a 8086/8088. If there is some Easter egg Kildall left it was, probably, in those syscall identifiers. Are they discontinuous or something like that?
- ddebernardy 10y agoYeah, they bought QDOS (Quick and Dirty OS): https://en.wikipedia.org/wiki/86-DOS https://en.wikipedia.org/wiki/86-DOS