Digital PDP11/10 PDP 11/20 Price List Dec 15, 1969

Noel Chiappa jnc at
Mon Jan 26 12:56:00 CST 2015

    > From: B Degnan

    > there was a "rev 1" PDP11/10 that was used as a process control system.
    > You could buy the 11/20 version that had the front panel. Otherwise
    > they were very similar/same systems.

According to my 1971 11/20-15-R20 handbook, the 11/15 (the 'rev 1' 11/10,
KC11 processor) did have one significant difference from the 11/20, which is
that it only supported one interrupt level, instead of four (see table pg.
2). I seem to recall reading that in other places, too.

Of course, according to that table, the 11/05 (KD11-B) also only supported 
one interrupt level, so maybe that table is confused.


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