In einer eMail vom 05.05.99 21:02:46, schreibt Tony: << imprinted, the It's _almost_ the RK11 bus. Not suprising since the Diablo/DRI model 30 was sold by DEC as the RK02/RK03 for a time. I've cabled one up to an RK11-C, and it is, indeed, just a cable. The problem is in the drive select lines. RK11-C's use 1-of-4 code (you assert one of 4 lines, like on a floppy drive). RK11-D's use a 3 bit binary selection code. RK05s can handle either (there's a signal on the connector of an RK05 that is pulled low by an RK11-D to indicate this). RK02's, etc can't. That's why you'll need a couple of chips to do the interfacing. -tony Hi Tony, I am aware of that fact. It is of course a very simple decoder. Since I will need to mate two different cables (one from the drive with the 42-pin connector, and another one from the controller with the bus paddle) I will have a little intermediate board anyway, where this can easily be put. First of all, of course, I will need to verify that the Plessey interface is in fact identical to the Diablo one; since the connector is the same, I am in good hope. Regards John