12 May
2015
12 May
'15
11:31 a.m.
On Tue, May 12, 2015 at 9:20 AM, Paul Koning <paulkoning at comcast.net> wrote:
The CP11 might have been CSS. I wouldn't have thought so since the one
VAX site I knew that had one wouldn't likely have ordered CSS gear.
Possibly at one time they had enough need for punching cards to
justify buying CSS, but by the time I encountered it the punch was
always powered down with a dust cover over it.
On May 11,
2015, at 11:56 PM, Eric Smith <spacewar at gmail.com> wrote:
Almost all DEC machines up through early VAX supported card punch
options. They just weren't very common other than on PDP-10.
PDP-8: CP08
PDP-10: CP10 (multiple variants) and CP20
PDP-11 and VAX: CP11
Do you have any descriptions of that? I have not seen any mention of a CP11 in any
peripherals handbook, nor in any OS. Was that a CSS product? Who built the punch engine? What sort of interface
did it use?
AFAIK, DEC didn't build any card punches; they are all OEM'd with
DEC-built interfaces. For the PDP-10 they OEM'd several different
models, possibly from multiple vendors. I don't know the details of
any of them, even though I used two different ones back in the day.
IIRC, the CP20 was a Unibus device, and might or might not have been
program-compatible with the CP11.