AyAlthough I've never seen one in the wild, the 8/S has always intrigued me. I would love to see a cycle accurate emulator of one. Wish I could do it myself but that's way out of my wheelhouse.
RayRay the Emulation Guy On Sun, Aug 17, 2025, 5:26 PM Tom Hunter via cctalk <[email protected]> wrote: > I forgot to say that my PDP-8/s has serial number 296 which means it uses > the "8k core module" which has only 4k core populated. Below serial number > 200 the PDP-8/s were delivered with the "4k core module" which is somewhat > different in both backplane layout and electronically. > > > On Sun, Aug 17, 2025 at 12:02 PM Tom Hunter <[email protected]> wrote: > > > I have recently bought a DEC PDP-8/s. It hasn't been powered on for about > > 40 years before I got it. I cleaned it and did some repairs on it (glued > > broken flip-chip handles, replaced all front panel lights, restored the > > acrylic front panel to as new condition and built a new switch mode power > > supply for +10V and -15V). > > > > After testing each flip-chip individually for dead shorts on the power > > rails I reassembled the flip-chips into the backplane and on power up it > > shows signs of life, but has a number of problems I will have to debug > and > > fix. > > > > Does anyone here have the original Engineering Drawings or good PDF scans > > of the drawings? > > > > There are reduced copies of the PDP-8/s Engineering Drawings in Appendix > A > > of the two PDP-8/s Maintenance Manuals on Bitsavers, but I have not been > > able to find scans of the actual Engineering Drawings. Some details in > the > > reduced copies in Appendix A are not legible. > > > > Thank you > > Tom > > > > > > >
