M865/M8650 (was Re: PDP8/A memory problems, what to do?)

From: Pete Turnbull <pete_at_dunnington.u-net.com>
Date: Thu Dec 27 19:43:51 2001

On Dec 27, 8:22, Ethan Dicks wrote:
> --- Pete Turnbull <pete_at_dunnington.u-net.com> wrote:

> > How different is an M865? Is it only current-loop?
> It is different. There is no 40-pin BERG connector - it has a set of
> split lugs line a W-076 card and a 18" cable with a standard Mate-n-Lok
> connector as seen on KSR-33s and VT220s, etc. I do not recall if I have
> any docs on it, but except for the 20mA/EIA differences, I think it's
> substantially similar, logically, to the M8650. It's a console port,
> only, permanently set to 03/04. I forget if the M8650 is modifyable or
> not.

The M8650 is, the jumpers on the split lugs near the 'A' fingers set the

Sounds like you might want something like a DLV11-KA -- that's a 20mA to
EIA converter in a little black box about 4" x 2" x 1/2". Actually, that
would be overkill; it has a 110 baud generator, reader-run control, and
other options. It's meant to add 20mA capability to EIA-only devices like
a DLV11-J but it can be used for any RS232-20mA conversion.

Pete						Peter Turnbull
						Network Manager
						University of York
Received on Thu Dec 27 2001 - 19:43:51 GMT

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