Re: What's the IIe's--Arghh!--MHz Speed?

[pg@sff.net (Paul Guertin)]

On 17 Jan 1999 18:54:02 GMT, supertimer@aol.com (Supertimer) wrote:

> Compare a 65C02 to a Z80 or an 8088/8086, for example, and you
> notice that for some instructions, the 65C02 can execute in as little
> as a single CPU cycle whereas the Z80 or 8088/8086 takes 4 or
> more. 

Every instruction (even NOP) takes a minimum of two cycles on a 6502.

> Thus, realistically, that 1Mhz IIe runs as fast as the original
> 4.77Mhz IBM PC.

In my experience, in real-world situations, a 6502 will be about 
twice as fast as a Z80 with the same clock speed, not four times 
as fast.
 
Paul Guertin
pg@sff.net