I want to attach an led across 2 pins of a 9 pin serial connector and have that led light when a command is sent to that connector (com1)
If I attach an led across those pins and from a DOS command prompt enter:\
echo jelly > com1 the led will turn on and then immediately off. This tells me that com1 is functioning OUTSIDE of DirectRT.
When I attempt to run the TTL I/O test from the tools drop down nothing happens. I choose port number 1016 (com1), I click READ and it reads the port and assigns a byte value of 255. When I click send byte now, nothing changes.
Certainly, someone out there has tried to wire a light to the serial port and activated it. help, help