So I have been lucky enough to obtain an SBUS Card that can link a suitable Sun Microsystems machine to an INMOS Transputer cluster.
Unfortunately I have no documentation for this card
I currently have this installed in a Sun SPARC 20 and have managed to source the drivers and support software to get this up and running.
The following dmesg output shows the MZ device which is the Meiko MK091
Trick-1 