Reproducing old machines with newer technology (Re: PDP-12 at the RICM)

[Dave G4UGM]

I am building a Baby/SSEM using a Nexys2 but sadly the board is now end of life....

Dave

> -----Original Message-----
> From: cctech [mailto:cctech-bounces at classiccmp.org] On Behalf Of Jay
> Jaeger
> Sent: 13 July 2015 13:36
> To: cctech at classiccmp.org
> Subject: Reproducing old machines with newer technology (Re: PDP-12 at
> the RICM)
> 
> Another alternative would be to build a machine up from a Field
> Programmable Gate Array (e.g., the Digilent Nexys2 FPGA development
> board).  I recently completed an effort doing that for a 12 bit machine we
> designed and built in a logic/computer design class from racks of logic
> interconnected using IBM unit record plug boards in 1972.
> 
> I am going to attempt to do the same for IBM's 1410 computer - a really big
> effort.
> 
> JRJ
> 
> On 7/13/2015 12:52 AM, Kip Koon wrote:
> > Hi Michael,
> > I would be most interested in finding out more about this effort.  Do you
> have ongoing pictures documenting this effort?  I'd love to have a PDP 8, 11,
> 12 someday, but I don't have the space for something like that much less the
> cost involved so I'll have to be satisfied with emulators on my PC or
> eventually building one or more of these systems with current technology
> like the SBC6120 if memory serves.  Are there other possible alternatives?  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?  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 sc.rr.com
> > http://www.cocopedia.com/wiki/index.php/Kip_Koon
> >
> >
> >> -----Original Message-----
> >> From: cctech [mailto:cctech-bounces at classiccmp.org] 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
> >
> >