Ouch, but 2 Perqs out.

Tony Duell ard.p850ug1 at gmail.com
Sun Dec 13 00:25:48 CST 2020

On Sat, Dec 12, 2020 at 11:30 PM Josh Dersch via cctalk
<cctalk at classiccmp.org> wrote:

> > Question: Do the card cages and stuff come off the later Perqs as well?
> >
> Not as easily.  They can all be disassembled to a point but it's not nearly
> as simple as the PERQ 1/1A.
> If you pull the side, front, and rear panels off (be careful there -- the
> drives are mounted to the rear, and there are cables to deal with), and
> pull the boards, it should be significantly lighter.

After removing the above, you can remove the floppy drive (the normal
3 cable to an 8" drive and I think 3 screws) and the power supply
(under the floppy drive, there are 3 output cables with in-line plugs
and sockets, an IEC type main input on the back of the PSU chassis,
and 2 screws at the front). The fan tray can come out too, but it's
not worth doing.  The empty chassis (no drives, boards, or PSU) is
just about liftable.

> > Question: What does a Perq mouse look like?
> >
> It varies.  See the Digibarn T2 pictures for one example; the Summagraphics
> Bit Pad One was another common option -- big white tablet about 15" square
> with a 4-button wired puck.  GPIB interface.  There was also the Kriz
> tablet which was smaller and had three buttons.

The original mouse for the PERQ 1 (covered in the schematics book) is
very rare and I don't think Bob had one. Most PERQ 1s and 1As used the
Sumagraphics bit bad one, as you say with a GPIB interface.

The PERQ 2 mouse is a smaller tablet with a normal mouse-shaped thing
(3 buttons) wired to it. There are 2 versions, for portrait and
landscape machines. The cable ends in a DIN plug that goes into a
socket on the monitor. The PERQ 2 keyboard is connected in the same

A PERQ 1 keyboard has a DA15 plug on the end that goes into the back
of the processor box.

A PERQ 1 monitor has IIRC a DC37 plug carrying power, sync and video

A PERQ 2 montor has a DA15 cable for syncs and keyboard/mouse signals.
A BNC cable for video. Portrait monitors have a power cable from the
back of the processor box too. Landscape monitors have an IEC mains
input connector, sometimes there's a cable to the power output socket
on the PERQ, this operates a relay in the monitor to power the monitor
up when you turn the system on. Others just have a power switch on the


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