Glen Hewlett has published throughout the month of November five articles explaining how to setup and use interrupts on the TRS-80 Color Computer. He starts his blog talking about his motivation and objectives:
Recently I was working on my MIDI to CoCo converter program and I wanted to output the data with an option that would include the player that could be run from an IRQ. I was having trouble getting it working on the CoCo 1 and I started doubting my understanding. So I turned to the internet for some help but there wasn’t much in the way of example code for setting up and handling IRQs. It turned out that my problem was a typo and that my program code was OK after all. But since I discovered there isn’t too much info on IRQs for the CoCo that I should write up a blog and share what I’ve learned about them for others and to help myself in the future when I start second guessing myself again why my program doesn’t work the way I think it should.
The articles are deep, but they start with the very basic about interrupts on the CoCo3.
