Re: Wozniak vs Jobs

[dempson@actrix.gen.nz (David Empson)]

Joseph Lee <nugundam+NOUBE@netcom.com> wrote:

> Regnirps <regnirps@aol.com> spawned virtual particles writing:
> : P.S. Anybody who tells you a 4 MHz 65816 outruns an 8 MHz 68000
> : (original Mac) is out of their friggin mind.
> 
> Well, in the raw form in a chip tester.  But, if you plugged a 8MHz 68000
> into a Mac and a 4MHz 65816 into a GS, you would get the GS going faster
> because of the slow bus synchronization in Mac.  4 cycles to fetch a word,
> for 8 a longword.. come on!

And just how long is a 65816 going to take to fetch a longword and do
something useful with it?

A 4 MHz 65816 and an 8 MHz 68000 can transfer data at exactly the same
rate (four bytes per microsecond for the 65816, two 16-bit words per
microsecond for the 68000).

The 68000 will tend to win in anything involving complex calculations,
especially if you start dealing with data larger than 16 bits, or lots
of operands.

For raw data shuffling, the 65816 is probably going to win.


Real world example: an unaccelerated IIgs is comparable in apparent
speed (user interface) to a Mac Plus, though I think the Mac is a little
faster.  An accelerated IIgs (even a 7 MHz ZIP) beats the Mac hands
down.

However, do anything heavy duty, and the Mac will have no trouble
beating the unaccelerated IIgs.

-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand