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Author Topic: Sys 80 Non CPU boot/IRQ issue  (Read 3529 times)

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Offline MartyJ

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Re: Sys 80 Displays
« Reply #30 on: May 11, 2009, 10:17:18 PM »
The logic probe (I think) is starting to become handy.

It also appears that my IRQ is stuck LOW (pin 4 U1).

I've replaced U4 and U5 RIOTS....

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