Quote:
Originally Posted by demolition
Sounds to me like there is some action going on on that pin (which there should be until it has finished running the code in ROM).
_ROMEN will only be pulled low while the CPU is reading from it so it would be high most of the time. If you're just using a voltage meter, then the voltage you see would be some kind of average depending on how the meter handles high frequency signals. Imagine _ROMEN is a pulse train which is low 20% of the time, then the average voltage would be ~4V.
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That makes sense. I just need to be patient and wait for my logic probe.
BTW - I did get the diagrom today. I put it in and still black screen. Null modem is also on the way.