Richard

Going deep into my memory I think you can write to the LPT1 using an OUT
statement , or read from it using an INP (or IN ?? ) statement. They are a
bit different in syntax from each other but you should be able to find then
OK.

As far as the serial port is concerned, I think you have to either do a
OPEN COM statement and follow it with a READ #, WRITE# or PRINT# to do the
actual transfer as required. I don't think you can write directly (e.g OUT,
INP) to a serial port unless you manually set up the control registers
beforehand.

This was with "DOS" based  systems - newer operating systems probably won't
allow direct access to the ports anyway.

Richard P




Does anyone know how to write a QBASIC command to transfer a byte or
multiple sequence of bytes to the parallel port of a PC,  and also to read
a byte or multiple sequence of bytes from the parallel port?  Also, the
same question applies to the serial port.  I would appreciate any
information on this software question.

Regards,
Richard


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