Gregory's ServerU9 pin 11, aka Memory Write Protect#, measures 30 ohms to ground. this is suspicious.
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15 comments
 @tubetime What would've been the purpose of the MM to 45 jumper then? @sergioaguayogr the memory in the 6532 is used as a vector table. it's nice to protect it from accidental modification by a runaway program, so MM to 45 is a write protect function.  woot! |
sure enough, bad inverter. looks like it was bad back in the day--someone removed the MM to 45 jumper.