6502/Z80 speed comparison (was MITS 2SIO serial chip?)

From: CLeyson_at_aol.com <(CLeyson_at_aol.com)>
Date: Sat Dec 22 02:45:10 2001

In a message dated 12/22/01 Richard Erlacher writes:

> If you want to insist that you can devise a task, any task at all, mind you,
> that you can code in Z80 code to run at 2x the clock rate of a 6502, in,
say,
> <80 lines of assembler, that's strictly a computing task, just to leave I/O
out
> of it, or any I/O task that you think you can code in legitimate Z80
> instructions, providing a precise spec for the I/O task, then I'd certainly
come
> out and say you can't cook a legitimate one up that a 6502 can't accomplish
in
> less time, in the case of the computing task, and that, since the I/O task
spec
> limits the rate, the 6502 will be able to do it as well. I'd like to see a
task
> that meets those spec's

How about a straight insertion bubble sort ? A completely useless task but it
does take a defined number of data moves and compare operations. The array
to be sorted could be say, 16-bit signed integer, 1k words long and in reverse
order. (That should take a while for a 6502 to sort out).

Chris
Received on Sat Dec 22 2001 - 02:45:10 GMT