IBM PC Connecting to DECNET

Glen Slick glen.slick at
Fri Jun 3 19:22:32 CDT 2022

On Fri, Jun 3, 2022 at 5:41 AM Bill Gunshannon via cctalk
<cctalk at> wrote:
> Is there a schematic anywhere for the hockey puck mice?

Don't know if there is a VSXXX-AA mouse schematic anywhere.

There is a DEPCA print set:

Page 33 of the PDF has the DEPCA side of the mouse interface.
7-pin connector:
(1) Ground
(2) RX Data to DEPCA (goes to 9639 Dual Line Receiver)
(3) TX Data from DEPCA (comes from 9636 Dual Line Driver)
(4) -12V
(5) +5V
(6) +12V
(7) N/C
DEPCA Hardware Reference Manual, EK-DEPCA-PR-001
Chapter 3, Mouse Information details the mouse communication protocol

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