Priest of the Order of the Butterfly
Posts: 872 from 2003/3/4
From: #AmigaZeux, Gu...
Quote:
Jeckel wrote:
Z80@4Mhz is *much* slower that 68000@7Mhz. Maybe 10 times slower (or even worse).
Yes indeed, they're just 8 bit CPUs. Even at the simplest a word would require at least two cycles. In practice, most operations used multiple cycles.
But by 1985, Z80s were often running at 8 MHz, and by the time the CMOS versions came along (I don't know what year), at 20 MHz and up. The original 4 Mhz did 0.58 MIPS raw; the 68000 did just 1.4 MIPs at 8 MHz.
As a modern comparison, the Raspberry Pi 2's SoC does 4744 MIPS.
My point was, that the Amiga "super CPU" wasn't quite so super as we believed it was, even in its day.
[ Edited by KennyR 22.07.2017 - 21:51 ]
