In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Chong wrote:

Thanks for your help Guenther. How would the flag setting work? Wouldn't I have to reach a comparison point in my loop after the RETI is exercised? My concern is that my major loops have several "do nothing" loops which poll for a particular pin input. I would have to check the flags in every sub loop then because I wouldn't know when the ISR would be called. I managed to lengthen the pulse time to make detection easier with a latch which is can be cleared with the ISR.

I like your book by the way. My background is actually mechanical engineering so I need all the help I can get. The Basic Stamps were an easy entry, but the SX certainly has a lot more issues to think about.

Paul: thanks for the suggestion. I like it. It's my brand of jury rigging something with flagrant disregard for the right way to do things.

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