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- Path: tank.news.pipex.net!pipex!demon!alladin.demon.co.uk
- From: ajackson@alladin.demon.co.uk (Action Jackson)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: Cybervision, Busters, CPU boards etc.
- Date: Fri, 12 Jan 1996 17:40:26 GMT
- Message-ID: <821468527.12961@alladin.demon.co.uk>
- References: <4ah38r$j9s@news.uit.no> <30F4EF79.41C6@physics.gla.ac.uk> <4d30at$p1p@newsstand.cit.cornell.edu> <4d59aj$1vgk@rs18.hrz.th-darmstadt.de> <4d5p7c$e9e@newsstand.cit.cornell.edu>
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- fkrj@crux4.cit.cornell.edu (Benjamin Kenobi) wrote:
-
- >Matthias Meixner (meixner@rbg.informatik.th-darmstadt.de) wrote:
- >: Benjamin Kenobi (fkrj@crux4.cit.cornell.edu) wrote:
-
- >: : Hmm I have Buster09 and Rev3.0 and I get occasional gurus 8000 0004 while I
- >: : am running under intuition but not much trouble at all under shapeshifter.
- >: : I suspect that the problem is resulting from the fact that I have both of
- >: : these problems and that if I fix one of them the problem will go away. Right
- >: : now I really don't know what the problem is except that I have removed every
- >: : software patch that I can find and the problem still exists to the point where
- >: : I can't regularly use it.
-
- >: You have to replace the 74FCT244 which can be found under you CPU-board
- >: with a 74FCT240. The Rev. 3.0 CPU-board inverts a signal, that should not
- >: be inverted, and the 74FCT240 inverts it a second time, and the problem
- >: should go away.
-
- >I have heard this fix mentioned several places, but it is not mentioned
- >in the A4000 hardware guide or in Dave Haynie's definitive buster article
- >which also appeared in that guide. Does replacing this chip fix the same
- >thing as the cut and jumper modification which upgrades the A3640 to rev 3.1?
- >What I'd like to know is if this problem/modifcation is related to the
- >problems that are fixed by upgrading the A3640 from 3.0 -> 3.1 -> 3.2, or
- >if it is an entirely different problem that only manifests itself when
- >certain expansion cards are present (i.e. the CV64).
-
- Can some one please post what are the HW upgrades to the A4000!!
-
- Buster 11
- replace the 74FCT244 with a 74FCT240
- upgrading the A3640 from 3.0 -> 3.1 -> 3.2
- Any others???
-
-