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

-----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: 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. 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 > >