26 Jan
2010
26 Jan
'10
10:31 a.m.
On Jan 26, 2010, at 12:54 PM, Dave Caroline wrote:
I did a consultancy report comparing 6502, Z80 and
6802, the project
was for a Torque, Speed and Power measuring system that had a PWM
input from the transducer to an analogue out 200 times a second, I
dont have the paper doc any more but the 2 meg 6502 beat the Z80 and
6802, everyone at the time would mention the clock rate of the Z80
claiming it was faster, they never notice the clock is divided, basic
instruction rate was about 1 meg on the Z80.
This same problem happens all the time today...people assuming
that "more gigahertz" means "faster processor", even when it
doesn't. It's funny.
I was a dyed-in-the-wool Z80 guy in my early years (I still hack
around with them today, http://www.neurotica.com/wiki/Z80_SBC_1) and
mostly ignored the 6502 due to the lack of registers. I could never
deny, though, that some hard-core 6502 guys could really work magic
with that architecture. Oh the creativity that existed in those
days. It only really seems to survive today in the embedded systems
world.
6502 the original risc
In my first participation in an actual religious war...Years ago,
I used to refer to 6502s as "RRSC"...Reduced Register Set Computing. =)
-Dave
--
Dave McGuire
Port Charlotte, FL