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-boun...@classiccmp.org] On Behalf Of Jay > Jaeger > Sent: 13 July 2015 13:36 > To: cct...@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 > > computer...@sc.rr.com > > http://www.cocopedia.com/wiki/index.php/Kip_Koon > > > > > >> -----Original Message----- > >> From: cctech [mailto:cctech-boun...@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 > > > >
