[rescue] Interface info for IBM Dials and Buttons boxes?

[Julius Sridhar]

On Thu, 21 Feb 2002, Eric Webb wrote:

> > > When I last looked at the book for these things I remember seeing that an
> > > RS-232 port came in there somewhere in addition to the tablet port.  Now,
> > > where did I see that book at....
> >
> > RS/6000's usually have two DB25 serial ports along with their Keyboard,
> > Mouse, and Tablet ports.  There are also add-in cards for 4, 8, 16, 64, or
> > 128 (!) coprocessed serial ports.
>
> Well, yeah, I realize all that.  What I'm saying is that I saw a diagram that
> displays connecting the dials device via BOTH the tablet and RS-232 ports,
> i.e., you may not be able to do a full daisy chain for everything via the
> tablet port alone.

There are a bunch of them here.  They all just have an upstream and a
downstream.

> What I found was a couple pages out of the Adapters, Devices and Cable Info
> for MCA-Bus Systems book.  It shows some connection diagrams, but they take
> into account the LPFK (Lighted Programmable Function Keyboard).  May not be
> of any help here yet, but at least I found what I remembered reading about
> the dials device in.....

The Buttons, Dials, Spaceball, and Tablet are all very similarly attached.

> BTW, what is an IBM RT PC?  Anything at all related to RS/6K's?

It's the predecessor of the RS/6000 line.  Based on the ROMP chip.  One of
the earliest processors designed specifically to be RISC.  The chip was
out *long* before the system.  RT's are nice.  I want one.

Peace...  Sridhar