Article View: net.micro.atari8
Article #3716502 vs Atari
From: Bill Dippert
Date: Tue, 19 Aug 1986 07:00
Date: Tue, 19 Aug 1986 07:00
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1958 bytes
Apparently the so called "6502" used in the Atari's is a custom modified
chip, hence its not using the industry type JDEC number. From Mike at Xerox
comes the following:
Atari 6502c #C014806 standard 6502
pin no. function pin no. function
36 READ/WRITE 36 N.C.
35 /HALT 35 N.C.
34 N.C. 34 READ/WRITE
Therefore one could bend up pins 34 and 36 and do a wire connection to swap
these two pins, but that would still leave you without a /HALT command.
(Presumably the halt command is necessary.) I do not know if the 6502c
chip used by Atari is identical between the original 400/800, the intermediate
XL series and the current XE series. Presumably there have been some improve-
ments but I do not think that they have gone to CMOS. Any comments from
Atari? Does anyone know if the 65802 chip has a halt function? Possibly,
if it did, it could still be used with a 34/36 pin swap out.
--Bill--
==========================================================================
It is rare to find anything unmodified in my household. Half of my
cats don't even have tails. -- Don't flame me, they are Manx breed!
==========================================================================
Any openings for a mechanical/electromechanical engineer/tinkerer???
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!lll-crg!nike!ucbcad!ucbvax!decvax!tektronix!tekgen!tekigm!tekigm2!wrd From: wrd@tekigm2.UUCP (Bill Dippert) Newsgroups: net.micro.atari8 Subject: 6502 vs Atari Message-ID: <911@tekigm2.UUCP> Date: Tue, 19-Aug-86 03:00:00 EDT Article-I.D.: tekigm2.911 Posted: Tue Aug 19 03:00:00 1986 Date-Received: Fri, 22-Aug-86 20:19:29 EDT Organization: Tektronix, Inc., Beaverton, OR Lines: 27