VT101 8085 CPU Fault

tony duell ard at p850ug1.demon.co.uk
Mon Jan 19 02:04:48 CST 2015

> I just found something interesting, the pin activity on the address lines, RD, WR, ALE etc appears normal for a bit, 
> and only after a few seconds does it all become inactive.
> Perhaps this really is an indication that the ROM is bad, if it is getting into some kind of loop where it does no 
> external activity. I don’t really know the 8085 to know whether that is possible.

What if (due to ROM or RAM problems maybe) the 8085 executed a HLT instruction?


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