axaris@acsu.buffalo.edu (vassilios e axaris) (08/07/90)
Hello, I have written a com1 isr which doesn't seem to work eventhough it is rather simple. I use MSC 6.0 and after going carefully through the 8250's manual for initialization values, I cannot get the damned thing to work. I am testing it by transmitting a value from com2 and use global vars to store the incoming data. But, no dice! :-( All the declarations are correct, everything in order. Is there a way to trace what's going on? My settings are: 9600 baud, 8 bits, 1 stop bit, no parity. I noticed one thing so far: the status as returned by _bios_serialcomm (used only for initializati- on) is different during different runs. But the important bits are properly set, ie: break, frame error, time out, overrun, e.t.c. Any suggestions will be greatly appreciated. Vassilios E. Axaris
KRW1@Lehigh (08/08/90)
Borland's Turbo Debugger running in 386 virtual mode works fine for tracing into ISR's.