sbanner1@uvicctr.UUCP (S. John Banner) (12/01/88)
Hello,
I have this TSR Terminal emulator that I am writing, that works
quite nicely under DOS 3.XX, but when you run it under DOS 4.XX, and
hit the Hotkey from the DOSSHELL, the machine locks up. The program
works fine if you drop into the command line before poping up, or if
you run some other program from the shell, then popup from there. It
is just when you try to pop up from some point where the shell has
control of the screen, when the program bombs. When it bombs, it locks
up the computer, as I recall, so tight that you have to turn off the
power, to get it back. I am writing the program in MSCV5.1, with a
few bits of assembler, for very time critical functions, or things
that are too much of a hastle to do from C. The program keeps hold
of the Serial port's interrupt, and a few other required interupts,
while it is not poped up (so that you can stay logged on, and get
your screen updated while the program is not visible on the screen),
but the only problem seems to be when you try to popup. Unfortunately,
I am at a loss as to where to look, and the DOS 4 documentation I want
has not arrived yet. Does anyone out there have any suggestions as to
where to look? I have not heard of any conflicts with any other
programs, except SIDEKICK (that one goes away when you load the
programs in the right order), and other software that uses the serial
port (obviously). Any help will be greatly appreciated,
Thanks in advance,
S. John Banner
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