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From: mitchalsup@aol.com (MitchAlsup1)
Newsgroups: comp.arch
Subject: Re: control co-processor
Date: Wed, 7 May 2025 16:44:25 +0000
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On Tue, 6 May 2025 23:58:00 +0000, EricP wrote:

> MitchAlsup1 wrote:
>>
>> In the distant path, I had the select lines (the heavy loads that
>> cross the data path and select things for it to do) captured at
>> the other end of the data path with a skewable scan clock so we
>> could (essentially) see the timing of the select lines after
>> crossing the data path. This made it possible to use the scan
>> path as an oscilloscope.
>
> Was that the AMD with the 6 phase clock you mentioned before?
> I was wondering about how boundary scan would work with that.
> I suppose you'd have 6 separate scan paths to capture each
> phases logic states.

All you need is a skew generator--which could be external
(i.e., tester).