PDP-11/10 repair started

tony duell ard at p850ug1.demon.co.uk
Sun Oct 4 16:10:13 CDT 2015

> I define 11/10"S" by the backplane. There are 4 different backplanes
> for the 11/10 and 11/05, according to the doc. I have them on my website,
> www.pdp-11.nl/pdp11-05/cpu/backplanes.html


> I did not know that there were different versions of the CPU boards,
> except the Rev.E and Rev.F of the M7261.  Good to know!
> Seeing whether there is an XTAL for the console comms line is easy to
> spot, but IIRC it is RC on my M7260.

I am working from 2 Printsets, both from Bitsavers. One is the GT40 one (yet another
backplane of course, but the same CPU, core memory, etc). That shows the older
CPU. The other is the 11/05S schematic, which shows the later boards with the 
crystal UART clock, the links I ,mentioned, etc. I am sure we will get it sorted out.

As I said, the logic is much the same, certainly in the areas we need to look at first. ICs
might have different positions, but that shouldn't be too confusing.


More information about the cctalk mailing list