Computer Engineering (DEC) - was Re: PDP-12 at the RICM

Toby Thain toby at
Mon Jul 13 08:35:08 CDT 2015

On 2015-07-13 1:52 AM, Kip Koon wrote:
> Hi Michael,
> I would be most interested in finding out more about this effort. ...  I used a PDP-8/E in high school and college
and have been quite interested in the high capability PDPs like the
PDP-11 Series for starters. I didn't know there were PDP 12 Series
computers. Are there other PDP series computers as well?

A good reference to the complete PDP range is "Computer Engineering: A 
DEC View of Hardware Systems Design", Bell, Mudge, McNamara.

(It's a beautiful hardcover to own, but there's a link to an online HTML 


 > Congratulations
on your restoration efforts! I wish I could see what all you guys have
been and are up to! Take care my friends.
> Kip Koon
> computerdoc at
>> -----Original Message-----
>> From: cctech [mailto:cctech-bounces at] On Behalf Of Michael Thompson
>> Sent: Sunday, July 12, 2015 7:32 PM
>> To: cctech
>> Subject: Re: PDP-12 at the RICM
>> The RICM Learning Lab was nice and cool today so we spent the afternoon chasing the "LGP GP=GPC PRESET" in the TC12 LINCtape
>> controller. With a logic analyzer connected to lots of the TC12 signals were were able to chase down the signal that is causing the
>> fault. We are now not sure if the signal behavior we observed is the correct behavior, and there is a fault elsewhere. More debugging
>> time and more studying of the documentation is required.
>> --
>> Michael Thompson

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