> PD> Although I have not read it completely, this book of mine is
> PD> called "M6800 Microcomputer System Design Data". I contains
> PD> datasheets and technical breakdowns of (AFAIK) the entire 68xx
> PD> series. Just looking at the instructionset, the similarities and
> PD> differences (to 6502) are remarkable.
>
> Yes, and by no means accidental :) The 6500 started out as a pin com-
> patible 6800 replacement. The 6500 sold for a fraction of the price of
> the 6800, so naturally Motorola wasn't too happy about the situation.
> They sued, and after the settlement MOS changed the pinout, fixed a
> couple of bugs, and released the 6502.
And even now the 6502 is still 6800-bus-compatible (the PRG even advertises
it as such).
--
----------------------------- personal page: http://www.armory.com/~spectre/ --
Cameron Kaiser, Point Loma Nazarene University * ckaiser@stockholm.ptloma.edu
-- Got Mole problems? Call Avogadro at 6.02 x 10^23. --------------------------
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