On Sat, 5 Jun 1999 18:19:41 -0500 (CDT), John Valdes wrote:
> 
> I don't know about the Shadow Quadralink, but mine has two Zilog Z8530
> UARTs (Z85C3008PSC to be exact...).  There are no other major chips on
> the board (eg, no CPUs).  The other chips are:
> 
>   AMD AM26LS30 (one per port)
>   TI SN75195N (one per port)
>   Mot MC74F521N (one)
>   TI SN74ALS651NT (one)
>   TI SN74ALS534AN (two)
>   TI SN74ALS74AN (one)
>   ??  74F125
> 
> plus a couple of (E)PROMs, various resistor packs and a 3.6864MHz
> oscillator.
> 
> Using MacsBug and the Slots program, I've located the control and data
> registers on the UARTs, and know how to read these off the card via
> the sResource dir.  That's as far as I've gotten so far, though.

Sounds like the rest should not be that hard.  You should be able to
write a NuBus attachment for the MI zs driver, and that should be
pretty much it.

Ken