> >> 3) Is it documented?
The PC (that means 5150!) was significantly better documented
than any of the other microcomputers being sold retail to the
general public at the time. (conveniently excluding guvmint,
industrial, and institutional sales :-)
The "PC Technical Reference Manual" was cheap, and contained
complete schematics and source code for the BIOS. Third party
"disassemblies" being sold by third parties are NOT comparable!
Apple, Atari, Commodore, Radio Shack, etc. had documentation,
but not comparable. How many CP/M machines provided both
schematics and source code?