New question about AAUIs
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Posted by gregg dot drwho8 atsign gmail on November 21, 2006, 1:23 am
Please log in for more thread options Hello! 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. I have found our original discussion on the subject, however Google Groups consider it to be a closed thread even though they have an archive for it. ---- Gregg gregg dot drwho8 gmail dot com (No signature. The 'droid is off this week.) | |||||||||||||||||||
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Posted by glen herrmannsfeldt on November 21, 2006, 1:57 am
Please log in for more thread options 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 | |||||||||||||||||||
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Posted by gregg dot drwho8 atsign gmail on November 21, 2006, 8:32 am
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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.) --- Gregg gregg dot drwho8 atsign gmail dot com | |||||||||||||||||||
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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 >
You could also find any first generation PowerPC computers. 71xx, 81xx,
> 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.) > --- 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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> 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.