"Hans Franke" <franke(a)sbs.de> wrote:
using the same philosophy about a CPU, but the 6500/1
(or 6501) did use the 6800 Bus _and_ was pin compatible,
The 6500/1 and 6501 are *much* different parts. The 6500/1 has
on-board masked ROM, RAM, and parallel I/O. It was intended
to compete with the 8048.
Later on, the 6500/2 (or 6502) and all orther CPUs of
the 6500 series used their own bus protokoll and pinout.
AFAIK, there was never a 6500/2.