Fw: [sdiy] Anybody using Atmel AVR?

[Roy J. Tellason]

On Wednesday 22 December 2004 01:45 pm, Phil Harbison wrote:

> My only complain with the 6502/6800/6809 was they used a low speed clock
> equal to the memory cycle time (i.e. 1 clock tick per memory access) while
> the 8080/Z80 used a higher speed clock with 3 or 4 clock ticks per memory
> cycle. With a Z80 running at 4 MHz, a memory access can be extended with
> wait states in increments of 250 nanoseconds. With the equivalent 6502
> running at 1 MHz, you must extend it in increments of 1 microsecond.
> Presumably this makes it less beneficial to pipeline the 6502/68xx since you
> have one fourth as many clock edges on which to synchronize.

Yeah,  but when these days would you possibly want to impose any wait states 
on one of those chips?  It's not as if fast memory parts were scarce and 
expensive like it was back when those chips first came out...