PDP8-on-a-chip, PDP8 OpenCores (miniature PDP-8 / 11)

After finding an Intersil 6100 CPU on my FESTO device (12-bit PDP-8 instruction set), I found these interesting boards, a trainer from Elektor magazine

and this miniature PDP8/11

(originally found here with PDP11 and smal terminal

By coincidence I found this great C64 SID sound demo with nice digitized speech and special effects (maybe needs original hardware or sidplayer for all analog effects)