I am having trouble using a pic programmer. post
And want to rule out the serial port. From what I understand there are different types that use different voltages 5volts ~ 12volts and what to know how to tell the difference.
I have bean searching and searching for info for the command for the serial port in QBasic. Similar to the parallel portOUT,888 1 will give you the high voltage over pins 2, 25.
I thought this would be an easy thing to find. I was wrong!! I’ve found loads of beginners guides, and lots of people getting LEDs to flash with the parallel port but absolutely nothing on the serial port.
I did find some commands for it in a Linux, but my only experience of using Linux is knoppix which is a bootable Live system on CD so had some trouble understanding it.
I also found some info for c but as i have never used it before, Perhaps I should start as it’s a proper programming langue, but I like my basic as that was my first contact I ever had with a computer which was a bbc .
Just a trip down memory lane.
If you can help please do
Thank you jm