Motorola 68k family ( was Re: Comparison of system specs. )

From: Chris Kennedy <chris_at_mainecoon.com>
Date: Sat Dec 11 18:38:53 1999

ndiablo_at_diablonet.net wrote:

> Well, I can't say much from the Amiga side, but after playing around with
> Macs for a number of years, I don't think there were really any instances
> where instructions were _removed_ that broke software... I do remember
> there were a few specific issues when features were _added_ and a lot of
> software broke, like when the 68020 macs were introduced with onboard
> caches that broke some software that used self-modifying code, and when
> the 68040 was introduced with its onboard caches, I think it ended up
> breaking some software as well. This is all mac-related stuff, though,
> so I don't know if there were ever any similar issues over on the Amiga
> side.

We had the same cache problems when we first shipped the Hurricane boards
for the A1000; our workaround (such as it was) was simply to provide a
program that disabled the '020 cache...

Cheers,
Chris
-- 
Chris Kennedy
chris_at_mainecoon.com
http://www.mainecoon.com
PGP fingerprint: 4E99 10B6 7253 B048 6685  6CBC 55E1 20A3 108D AB97
Received on Sat Dec 11 1999 - 18:38:53 GMT

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