PDP-8s and -10s

[Mike Cesari]

On Jun 14, 2005, at 6:41 PM, William Donzelli wrote:

> Speaking of PDP-8s, and now PDP-10s - a thought that passed my mind:
>
> Is there a good reason why DEC did not use the PDP-8 architecture  
> in the
> PDP-10, for proper channel controllers? Cheap, versatile, sixbit,  
> and when
> the KA10 came out, already designed. I would have thought it to be an
> obvious "drop-in" solution.
>
> Any thoughts?
>
> William Donzelli
> aw288 at osfn.org
>
>

They used PDP-8's for various comm. I/O (sync and async) and unit  
record devices
(printers, paper tape punches & readers, and card readers).
These were called DC71, DC72, or DN92. Later, PDP-11/40's (and  
11/34's ?) were
used. There is some documentation on the TOPS-10 v7.03 CUST tape.

Mike