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From: pwu@uwmacc.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Profort program freeze on XT
Message-ID: <1030@uwmacc.UUCP>
Date: Fri, 6-Feb-87 17:53:53 EST
Article-I.D.: uwmacc.1030
Posted: Fri Feb  6 17:53:53 1987
Date-Received: Sun, 8-Feb-87 00:41:50 EST
Organization: UWisconsin-Madison Academic Comp Center
Lines: 22
Keywords: profort ibm pc freeze

I'm encountering a strange bug hope someone could help.

I have written a program using ibm's professional fortran
(from Ryan-Macfarland). It works fine on an AT. But when
I ran it on an XT it freezes in the middle. The machine
has to be turned off to reboot.

I tried to isolate where it freeze but discover that as
I put in write statements the "point of freeze" also
drifts. Running the program in a debugger (set break point
before where it freeze, then run the rest with trace on)
solves the problem! So much for isolating where it freeze.

I tried throwing out all memory-resident programs and all
device drivers. No help. I tried it on another XT, but
same thing happened. I have 8087 in both XT.

I'm running out on ideas (wish I have an 8086 emulator).
If you have seen this bug and know how to fix it
please let me know. Thanks.

peter