PDP-12 Restoration at the RICM

The RICM is restoring a PDP-12. This system was manufactured in December of 1972, so it is very late in the life of the PDP-12. The Priority Interrupt and the Data Multiplexer are hardwired in two extra columns in the processor chassis. These options were in separate chassis in earlier models. It came with an Omnibus expansion chassis that connects to the Posibus from the PDP-12. The LP01, RK05, and PC04 controllers are in the Omnibus chassis. The VR14 and TU56 controllers are in the processor chassis. We got the LP01 too. The donor did a great job of preserving the machine, and has all of the original documentation and software. The processor and RK8-F prints are newer than what I can find on the Web, so I will scan them and send the PDFs to Bitsavers. Yesterday we reformed the caps in the power supply and powered it on for the first time in 24 years. It is going to need some debugging, but it does show some signs of life. The CRT in the VR14 -- Michael Thompson