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- Newsgroups: comp.sys.amiga.hardware
- Path: sparky!uunet!gatech!darwin.sura.net!cs.ucf.edu!tarpit!tous!bilver!alex
- From: alex@bilver.uucp (Alex Matulich)
- Subject: Please explain buggy AGNES behavior!
- Organization: W. J. Vermillion - Winter Park, FL
- Date: Thu, 13 Aug 1992 14:01:25 GMT
- Message-ID: <1992Aug13.140125.945@bilver.uucp>
- Keywords: random color display glitches
- Lines: 54
-
-
- I am posting this for a friend who can receive email but does not have access
- to this group. Please reply either to him or me. His address is
- shepherd@riogrande.cs.tcu.edu (Robert Shepherd). Now on to the wierdness...
-
- Summary: Display shows odd things on it since installation of fatter Agnes!
-
- Background:
-
- Robert owns an Amiga 2000 with the original Agnes chip that used only 512K
- of chip memory. After upgrading his fast RAM to 4 megs with a GVP Impact II
- memory board + SCSI, he decided that he wanted a Fatter Agnes to increase
- his chip RAM capacity to 1 megabyte.
-
- So, he installed it. The instructions told him that he had an older mother-
- board, and that he had to cut a solder bridge on it whereas new motherboards
- have a jumper in that spot. It was pretty obvious where the bridge was,
- because it was labeled on the motherboard as J500. Robert is certain
- he did not cut into the motherboard (possibly damaging an internal layer).
- He also had to move another jumper, J101.
-
- Here's what he's been noticing since he installed it:
-
- 1) The Amiga crashes more often.
-
- 2) Squares, about 1 cm in size and filled with random colors, appear on
- the screen.
-
- 3) Sometimes 1 of these squares appears, sometimes a whole column full.
- It usually happens in a game or paint program, when a bitmap is being
- scrolled.
-
- [I first thought this was a manifestation of the infamous Sprite Bug,
- but after talking to him further I'm not so sure.]
-
- 4) Similar things happen in the Shell window. In fact, he can reliably
- reproduce one problem: When a shell window is opened with coordinates
- 10/10/500/100, characters in the window "get wiped out and become
- random bits going diagonally down the screen," according to him.
-
- I suggested to him that he swap in his old Agnes again and see what happens,
- and if it works, it would confirm that the motherboard isn't damaged.
- Beyond that, I didn't know what to suggest. Does he just have a faulty
- new Agnes chip?
-
- Please help! Email replies to shepherd@riogrande.cs.tcu.edu, or to me.
- Thank you!
-
-
- --
- _ |__ Alex Matulich
- /(+__> Unicorn Research Corp, 4621 N Landmark Dr, Orlando, FL 32817
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