interrupt driven serial i/o; dumb terminal emulator in MSC

[Dipto Chakravarty]

Would anybody happen to have a code in MSC (preferably in 5.1, but 4.0
will do too) which does (1) interrupt driven serial I/O, and/or (2) dumb
terminal emulation.

I need to do some capacity planning based experiment with system response
time. For this I would first need a dumb vt100-like emulator, written in 
MSC. Anybody out there who would kindly e-mail the code fragments across? 

Thanks in advance.