VT78 - lots of questions

From: Pete Turnbull <pete_at_dunnington.u-net.com>
Date: Sun Dec 24 20:31:04 2000

On Dec 24, 9:30, Mike wrote:
> I'm glad this thread came up. I have a WT/78. Is it the same machine as
> the VT/78? And also having a RX-02 and no interconnecting cable or
> software, I eagerly await the pinout specs too and have an outstanding
> for software.

As far as I know, they're the same thing, just sold with different
operating software.

I'm now sure I don't have the floppies that "belonged" to mine. They may
be at a friend's place, but I won't be able to tell until after the
holidays. So, I guess I'll have to download some from David's site, but
before I do that, I'll have to figure out which PC with which floppy
controller can read/write my 8" drives, and before *that* there are several
other logistical problems to sort out. So it may be a while.

However, I did check the RX02 printset and the RX8E Maintenance Manual, and
I see that the RX8E (and RX28, RX11, and RXV11) only passes 9 signals to
the M7744 (which is the microprogrammed controller in the RX02). The RXV21
and RX211 use two more: the RX DMA and RX AC signals. These 9 signals
(with corresponding grounds) happen to be every second pair (pins A/B up to
PP/RR) along the Berg connector so it would be logical to assume that they
match the pairs, in order, connected to my D-connectors, which have exactly
18 pins fitted. I'll give it a try when I've cleared some more space.

Pete						Peter Turnbull
						Network Manager
						Dept. of Computer Science
						University of York
Received on Sun Dec 24 2000 - 20:31:04 GMT

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