pozar@well.UUCP (Tim Pozar) (03/28/86)
Back in the old days of CP/M-80, we had what was known as an
I/O byte. This byte showed where we were directing the output to the
printer, console, tape reader, tape sender, etc. I assume that
MS-DOS has somewhat the same thing when using the MODE programme to
change the PRN device to say a COM port. What does MODE change?
How do I inquire DOS to find out where things are going? I have
found the place where DOS has the port addresses for the par/ser
printer ports, but haven't figured out where it keeps the info on
which one is the active on.
Any takers?
Tim Pozar C.E.
KLOK-FM
(415) 788-3904
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