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Posted by DLR on November 21, 2006, 10:30 am
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gregg dot drwho8 atsign gmail dot com wrote:
> glen herrmannsfeldt wrote:
>>
>>> Are AAUIs using the same serial communications model that the Mac used
>>> for all of its technology? As I recall it used the RS-422 methods for
>>> such functions as the GeoPort and even talking to printers.
>> AAUI is just like AUI, except with a 5V power supply
>> and a different connector. As far as I know, Apple didn't
>> want to put in power supplied big enough to run AUI.
>>
>> The AAUI to AUI adapter is line powered.
>>
>> -- glen
>
> Hello!
> I understand that much. I was asking about the connector between the
> computer and the AAUI. I've found documentation both Apple written and
> from groups of Mac enthusiasts to explain what the pins and why, but
> nothing was stated about how the DI-A and the DI-B and CI-A, and the
> CI-B and then the DO-A and the DO-B are wired to. Or what is carried
> there. I believe they are indeed RS-422 connected pairs but I don't
> have a Mac Quadra (5 model numbers and styles) or a Mac Centris (2
> model numbers and styles) to study before continuing with this further.
> I can state that I've met a Quadra before, but that was a long time
> ago. And in an different life. (The referenced location was
> http://micromac.com/expertknowledge/AAUI-pinout.html and it was indeed
> done on a Mac.)
> ---
You could also find any first generation PowerPC computers. 71xx, 81xx,
91xx, etc... Plus I think second gen ones. Have you checked out the
apple KB? Maybe the developer KB. The developer program has a free sign
up for things like the KB. And you might find it in the user KB.
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