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Path: utzoo!linus!decvax!tektronix!ucbcad!notes
From: notes@ucbcad.UUCP
Newsgroups: net.flame
Subject: Re: Godless 68000 instruction set - (nf)
Message-ID: <887@ucbcad.UUCP>
Date: Sun, 4-Dec-83 01:56:31 EST
Article-I.D.: ucbcad.887
Posted: Sun Dec  4 01:56:31 1983
Date-Received: Thu, 1-Dec-83 04:46:32 EST
Sender: notes@ucbcad.UUCP
Organization: UC Berkeley CAD Group
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#R:hp-dcde:32700001:ucbesvax:2900040:000:921
ucbesvax!turner    Nov 26 02:03:00 1983

{~ Re: Godless 68000 instruction set

Don't get me wrong, I like the 68K alright, but I am entirely in agreement
with Jack's comments.  Why *was* clr made into a read-modify-write?  There
is already a quite respectable suite of RMW instructions on the 68K (even,
God bless 'em, some bit-twiddling operators of this kind), so there really
was no excuse.  And the compromised orthogonality is a pain, too, though
not too great a price to pay to have so many registers on a chip.

Side-note to hardware hackers: don't bother your brain about the 6800-
compatibility signal pins, and the device-supplied interrupt vectors--
you will never figure them out, and never use them in any case.  It's
clear that the most unsavory parts of the 68K were "designed" by some
flacks from the marketing department.

Marketing departments!  Don't even TALK to me about marketing departments!
---
Michael Turner (ucbvax!ucbesvax.turner) ~}