Hi,

 Normally I'm just reading, but now a post from me. I do 
have a DecStation (5000/200) but am planning to run Ultrix 
on it instead of NetBSD :).

> Well, the card is no problem, now a cable...that is a 
>problem...
>A high density 100+ pin connector (looked like an extra 
>wide 50 or 68 pin SCSI
>connector) might be hard to find, and I sure as hell am 
>not up to wiring a cable
>up; 50 pins is my limit(what a pain that was)!

 This sounds a lot like the VME-P2 expansion port on my 
Silicon Graphics PI 4D/35, so it might be some sort of 
industry standard. The only option I know of was the Iris 
File, so that might be connected to the PI by that P2-VME 
connector. This Iris file was an extra cabinet with disks.

 Also found some other stuff while searchin for something 
entirely unrelated:
TC-100: Parallel printer port for TURBOchannel
TC-200: IEEE-488 (GPIB) interface for TURBOchannel
TC-300: TURBOchannel to VME bus bridge
TC-400: 8-port serial mux, no modem control for TURBOchannel
TC-410: 2-port serial mux with modem control for
        TURBOchannel
TC-420: 8-port serial mux with modem control for
        TURBOchannel
TC-500: MIL-STD 1553 interface for TURBOchannel
TC-600: TURBOchannel Real-Time Clock module
TC-700: Dual-ported memory interface for telemetry 
         interface to TURBOchannel 
TC-900: TURBOchannel to CEPT interface
TC-910: TURBOchannel to T1 interface
Device Drivers for Ultrix, VAX/VMS, Alpha/VMS, Alpha/OSF1 
in C and assembly.  Diagnostic and self-test software.

http://www.daa-utah.com/html/project_descriptions.html

 These would be internal descriptions, so maybe this TC-300 
is the same as your card and they have C-drivers for it... 

 regards,
   Michiel