Ed, (01)
Thanks for posting this! It seems like the right explanation for
what we're seeing. We'll make a note of that in our report and documentation. (02)
At 11:20 AM 5/19/2006, Ed Taft wrote:
>On 5/19/2006 10:45 AM, Philip Gust wrote:
>>The only problem encountered was that our custom adapter cable was
>>wired backwards, so key0 registered as key4, an so forth. The
>>cable was built from Xerox Alto schematics, and we need to
>>determine whether the problem was how the cable was wired or the
>>schematics. In any case we were still able to complete the tests,
>>and we can easily rewire the cable to set things right.
>Here is a possible explanation for this discrepancy --
>
>The Alto, like most machines designed at Xerox PARC, was a
>big-endian machine. It was PARC custom to number bits on such a
>machine left-to-right, so that the high-order bit is numbered 0.
>This is in contrast to today's almost universal industry practice of
>numbering bits right-to-left, so that the low-order bit is numbered
>0. This might have caused confusion in interpreting the Alto schematics.
>
>Ed Taft (03)
Philip Gust
Nouveau Systems, Inc.
3120 De La Cruz Blvd., Suite 120
Santa Clara, CA 95054 (04)
phone: +1 650 961-7992
fax: +1 520 843-7217 (05)
mailto: gust@NouveauSystems.com (06)
Nouveau Systems products seamlessly integrate collaboration,
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http://www.NouveauSystems.com (07)
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