[rescue] AUI duplex [was Re: New SPARCStation 10 owner, needs help with some issues though.]

Maciej W. Rozycki macro at linux-mips.org
Sat Feb 6 11:39:53 CST 2016

On Sat, 6 Feb 2016, Carl R. Friend wrote:

> > I _think_ AUI uses separate pins for transmit and receive, so the only
> > reason it couldn't do full-duplex is that the usual driving electronics
> > isn't designed for it (not surprising, since, as you say, it comes from
> > the days of shared broadcast medium).
>    Yes, different twisted-pairs in the transceiver-cable. I suppose
> AUI *could* be convinced to do full-duplex, but since the original
> design called for a single length of coax it would have been rather
> meaningless.

 I have seen 10BASE-T AUI transceivers advertised somewhere that could be 
DIP-switched to a full-duplex mode.  Obviously the connected Ethernet MAC 
chip would have to cooperate; I guess not all can do DMA in both 
directions at a time.



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