From: Bryan Pope (bpope_at_wordstock.com)
Date: 2007-03-19 20:54:30
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>
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> > 2. With a 2031, it powers up correctly but whenever you try to do any
> > disk access like get a directory or header a disk, the computer hangs
> > until I power off the 2031. I have already swapped the ROMs and the
> > 6522, but the problem still persists. I haven't swapped the
> > 75160 and/or 75161 yet. Could one of these be the problem and if
> > so which one should I swap first? I am trying to minimize any
> > desoldering/soldering...
>
> IIRC the 75161 is the control lines driver (ATN, NDAC, ...). This
> would be the one that would cause a hang. However, I'd rather
> measure the input/output signals to check what's wrong before
> unsoldering any other ICs.
>
Is there a webpage that describes how to measure the I/O signals?
Do I need to use an oscilloscope or will a multimeter do? Do I
need some sort of breakout box?
Thanks!,
Bryan
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