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Author Topic: Sys 80 Non CPU boot/IRQ issue  (Read 3634 times)

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Marty Machine

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Re: Sys 80 Non CPU boot/IRQ issue
« Reply #75 on: May 31, 2009, 11:42:27 AM »
Quote from: MartyJ on May 31, 2009, 09:42:06 AM
Definately NO continuity between pin 12 Z26 and pin 15 U5.  Might be an error in schematics as the track from pin 15 u5 pin 10 Z12.

Very weird, as the schematic shows Z12-pin10 goes to Prom 2 addressing, pin21, via the E2 jumper link....
 ^&^
MM.
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