Thanks Noel, Yes, I tried to repair an 11/34 once after somebody plugged a peripheral board into a memory slot - I was doing well after 3 or 4 chip chnages, it started to come to life, until I found the 20V went right into an d=address line of an in-house numbered ROM!
Having been warned by angels I will take another route! cheers, Nigel Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU Amateur Radio, the origin of the open-source concept! Skype: TILBURY2591 nw.john...@ieee.org On 2021-01-30 11:51 p.m., Noel Chiappa via cctalk wrote: > > From: Glen Slick > > > The KDJ11-E 11/93 has PMI signals on the CD connectors, so you need a > > Q/CD backplane > > I have this bit set that plugging a PMI card into a Q/Q slot will damage it? > (I think the issue is that some PMI pins are 12V on normal QBUS; too tired > to check tonight, I'll get to it tomorrow.) > > Noel
