Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!uakari.primate.wisc.edu!samsung!think!ames!amdahl!ntmtv!gauthier
From: gauthier@ntmtv.UUCP (Jay Gauthier)
Newsgroups: comp.sys.mac.programmer
Subject: Control Panel Crash in Low Mem
Message-ID: <378@ntmtv.UUCP>
Date: 27 Nov 89 22:13:24 GMT
Organization: Northern Telecom, Mtn. View, CA
Lines: 29


Okay, here's the scoop.  We're developping an application for the MAC.
It  includes a couple of drivers that among other things listen to the
serial port.  These drivers are loaded in at INIT time and run all the
time.  The application that talks to these drivers works alright.

Now we bring up the Control Panel.  The system heap is quite full, but
there is some room left.  Now we generate some activity on the serial
port, which causes the drivers to allocate memory from the system
heap.  All of a sudden, the Control Panel disappears, and the mouse
freezes.  Things are still alive, the clock works, etc. but there is
only so much you can do without the mouse.

Here are the details:

Running MultiFinder, System 6.0.2, Finder 6.1, at least 2M RAM.

The crash happens on an SE with 2M and 2.5M, but *doesn't* happen on a
MAC II with 2M.

Any help would be greatly appreciated.

aTdHvAaNnKcSe

-- 

Jay Gauthier
BNR,   Mountain View  CA    (415) 940-2101
uucp: {hplabs,amdahl,ames}!ntmtv!gauthier