Quote Originally Posted by Darrel Taylor View Post
Which button in MicroCode Studio did you use to compile the program?
Use the buttons next to the Device select Drop-down box.
"Compile Only" or "Compile and Program"

hth,
Well, I'm somewhere north of humiliation and south of seppuku.
After the hours I spent scrupulously examining the components, the power supply, the configurations and the hex files.... I was clicking the wrong button.
Thank you Darrel for spotting the problem. The pic is happily blinking LEDs and even making music.
And thank you ALL for your helpful suggestions.
What a fabulous resource this is. I hope I can repay the favours and not make any more grotesque errors as I make my way through the learning curve.
I have to say the feeling of exhilaration is way out of proportion to the final result: a blinking LED. But it's made my weekend.
Thanks again.