DEC Pro-350

From: Hans B Pufal <hansp_at_aconit.org>
Date: Sat May 18 23:51:12 2002

Pat Finnegan wrote:

> Does anyone have info on getting one of these to work with a serial
> console? I *could* build myself a console cable, and probably will do
> that, but getting this thing running at least *somewhat* would be nice
> right now.

This, from the Pro 300 series Technical Manual page 5-8:

The console DL is included as a maintenance feature. Physically it is
the same port as the printer port. The printer port can be made to
simulate a standard console interface. When a terminal is connected to
the port instead of a printer, the address decoder reconizes the console
  addresses 17777560-17777566. In this mode the port programs like a DL
serial device with a receiver CSR, a receiver data buffer, a transmitter
CSR, and a transmitter data buffer. Accesses to these registers when a
terminal is not connected to the port result in reads of all zeros and
writes with no effect. All the printer port reisters 17773400-17773406
are always available.

  .....

When pins 8 and 9 of the printer port connecter J6 short, the hardware
determiens that a terminal is connected to the port. When usingt he port
for a printer, a printer port cable (PN BCC05) should be used (the cable
does not short pins 8 and 9)....

  -- hbp
Received on Sat May 18 2002 - 23:51:12 BST