Article View: comp.sys.mac
Article #44808Bad heap w/MacsBug and SuperLaserSpool
From: math1h3
Date: Thu, 04 Jan 1990 22:18
Date: Thu, 04 Jan 1990 22:18
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1671 bytes
I just had 4 megabytes of 80 ns ram installed in my Mac II. I then
gleefully installed all my INITS, including SuperLaserSpool 2.0, MacsBug 6.0,
SuperClock, Vaccine (already installed), and maybe some others. Later that
day, when I tried to print an Excel 2.2 speadsheet, the Mac spooled and then
crashed into MacsBug with a message 'bus address error.' Today, printing from
Word 4.0, the SuperClock display changed font, or disappeared until the
printing finished. Using the interrupt switch to go into MacsBug, I discovered
that my system heap was bad ('bad heap at 00001e00: number of free zones does
not match heap header,' or something like that). This heap problem disappeared
after removing SuperLaserSpool, re-appeared after re-installing, remained even
after system replacement.
I tried removing all INITS except SuperLaserSpool and MacsBug. Same
problem.
Now I removed MacsBug, and the mac prints ok, with no crashes or
strangeness (so far), but I can't check for heap problems. Quite possibly the
fault lies with MacsBug. Any suggestions, comments?
Could there be an undetected harware problem with the memory? The
About Finder window shows a full 5120 k of memory. Is there a problem
installing 80 ns memory in one bank, and 120 or 100 ns in the other?
David Wagner
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!samsung!zaphod.mps.ohio-state.edu!lavaca.uh.edu!elroy!math1h3 From: math1h3@elroy.uh.edu Newsgroups: comp.sys.mac Subject: Bad heap w/MacsBug and SuperLaserSpool Message-ID: <5311.25a3776e@elroy.uh.edu> Date: 4 Jan 90 22:18:54 GMT Organization: University of Houston Lines: 22