6502 cycles and subtleties (was Re: Assembly on a Apple IIc+)

From: ben franchuk <bfranchuk_at_jetnet.ab.ca>
Date: Sat Feb 8 22:37:00 2003

Eric Smith wrote:

> The original claim back in 1975 that the 6502 (and fmaily) was pipelined
> was probably intended as a comparison to the other microprocessors of
> the time, especially the somewhat similar 6800, which took more clock
> cycles to do most operations, because it did not have even the small amount
> of pipelining of the 6502.
>
A hidden gotya is the index registers are 8 bits. No problem
for small dedicated control but somthing that limited high
level languages to Basic and Pascal p-code.
Ben.
Received on Sat Feb 08 2003 - 22:37:00 GMT