If you are still persuing this, as mentioned,, you need to use ioport.
check out this website
http://www.winsoft.sk/
I had to use it to write a threaded spooler for legacy, expensive serial
printers.
Colin/Mina wrote:
Hi,
I want to monitor some code to ensure that I have some timing
correct. I was hoping to hook my oscilloscope to a readily available
electrical signal (Such as Serial Port RTS) and to add instructions in
my code to set and clear the appropriate modem port.
Unfortunately the old Turbo Pascal instructions that allowed this, eg
Port[$2FC] := 2) // Set b2 of Modem
Register and
Port[$2FC] := NOT 2) // Clear b2 of Modem Register
but these don't appear to be available in Delphi (not in D5 anyway).
Any solutions please?
Thanks
Colin
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