🚀 go-pugleaf

We have written a piece of software that uses a home-grown, text-mode
windows library.  Our software drives several peripherals through 
serial ports off of a DigiBoard.  Now, normally, our software is 
compiled and run off of an IBM PS/2.  However, one of our customers
has the following set up:  an IBM-compatible with a CGA monitor 
BUT driven by an EGA card.  Please note that we are running our program
in text mode, so we think the EGA card should have no problem with 
the CGA monitor.

Unfortunately, something is simply not working.  Our customer has the
same software running on an IBM PS/2 with no problem.  But on the 
above IBM-compatible, at a specific place in the code, the program
consistently locks up.  We have gone over this area of the source 
over and over again, and we can see nothing wrong till now.  Our
guess at this point is that it is a hardware related problem - something
is just not compatible.  Can anyone give us a hand?

One last thing: We asked our customer to send us the computer he was
using to check it, and we sent him a replacement (another IBM-compatible
with EGA card, non-IBM PS/2).  The funny thing is we can run the 
software perfectly in our lab off the computer he sent us!  And what's
worse is that the new computer we sent him is also failing now too!!
One more last thing: Our customer uses our system in a clean room.  Is
there enough noise to mess up program execution - but in the same place
consistently?!?

Thanks for reading this, and more thanks if you can help us...
Please email at "aabdalla@pollux.usc.edu"

Ahmed