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Yes, that's what they mean by "clean room" implementation. The implementer should not be "polluted" by the previous implementation. This is what Microsoft did w
by skywal_l 5y ago
Yes, that's what they mean by "clean room" implementation. The implementer should not be "polluted" by the previous implementation. This is what Microsoft did when they revert engineered CPM and created DOS.
- teddyh 5y ago> This is what Microsoft did when they revert engineered CPM and created DOS. Um, Microsoft bought (what was then called) 86-DOS outright from another company, and ported it to the 8088 CPU used by the original IBM PC.
- illys 5y agoRight... But there is nearly (no?) work to port from 8086 to 8088. The work was to adapt to the underlying IBM system calls (BIOS) and to the specific wired electronics (video card, DMA, mass-storage media, clock, keyboard...).
- lodovic 5y agoI think you mean Compaq who created a clean-room implementation of the IBM PC BIOS.