kda50 manual and sdi cables & questions

[Antonio Carlini]

Ethan Dicks wrote:
> I don't know for certain about the RA73, but my RA70 has a
> front panel that attaches via a low-pin-count ribbon cable.  I
> am not aware of any local configuration jumpers, but I have to
> admit that I've never looked.  In any case, the drives do come
> up with sensible defaults if no front panel is attached, but
> AFAIK, if you want to hook multiple drives up to the same
> controller, one would need a front panel, at least on the RA7x
> series.  With the other drives that I've worked with, this
> isn't a problem because the front panels are integral*. 

The RA7x series all accept some kind of OCP, but they all
(or at least all the ones I have seen) have some way of 
configuring them without the need for the OCP. I'm pretty
sure all the manuals I have scanned are available via Manx and 
that should cover the RA70,RA72 and RA73.

> * except for this one RA90 front panel I have in my parts bin
> that's been attempting to attract a compatble drive for years
> without success.  I'm still "stuck" with RA81s, an RA60, and a
> couple of RA70s... nothing SDI with massive capacity (massive
> from a VAX, not PDP-11 standpoint).

The biggest SDI drive I recall (in capacity) was the RA74 which
was a whopping 3.5GB - not a whole lot to shout about! Much
lighter than the 1.5GB RA92 though!

Antonio

-- 

---------------

Antonio Carlini arcarlini at iee.org