RA71 all alone?

From: Michael Sokolov <msokolov_at_ivan.Harhan.ORG>
Date: Tue Aug 3 15:35:36 2004

Brad Parker <brad_at_heeltoe.com> wrote:

> anyone know if I can use a RA71 drive all by it's lonesome with an UDA50?
>
> I have some RA90's which are working fine but I found a naked RA71
> recently and was wondering if I can use it. (probably not without some
> sort of controller board, but I thought I'd ask)

RA71 is an SDI drive just like RA90 and every other RAxx drive. They
all connect directly to an SDI controller (UDA50, KDA50, KDB50, KDM70,
HSC, etc). You just need the right SDI cables. I have never seen a
UDA50 (all my life so far has been Q-bus MicroVAXen, so all my RA drives
are on KDA50s), so I don't know what cable it will need.

> It has a obvious molex power connector and three .1" headers. Two of
> the headers look like they want to accept the 8 pin plug from my UDA 50
> :-)

Those are SDI connectors for port A and port B. The larger header is
for the OCP (operator control panel). Having an OCP is nice, but one can
live without it (I have none myself). Without an OCP the drive gets its
unit number from 3 switches on the side. This limits the unit number to
0-7, while the MSCP spec allows much higher unit numbers. I believe you
can get the full MSCP spec range of unit numbers with the OCP.

MS
Received on Tue Aug 03 2004 - 15:35:36 BST