17 Sep
2021
17 Sep
'21
10:44 p.m.
There is a KT11B paging option that makes the PDP11/20 a 18 bit machine. It looks a bit
like the TC11 DECtape controller. I've got the schematics from the internet. But I
have no idea how it compares to the later MMU units from the software perspective.Love to
see them and if you know where you found them.
Al has put them online once.
http://bitsavers.trailing-edge.com/pdf/dec/pdp11/1120/KT11-B_EngrDrws_Feb72…
The V1 work was for a PDP-7 and is before the first 11/20 was secured. The point is that
I think there is a hole in the the SW we have.
I just looked again at what Warren has -- it is the 11/20 assembler code that Dennis
scanned. I have forgotten that we still had that. I wonder if it had the KS-11 stuff in
it. I'll have to peek
I wonder is there is some compatibility with the KT11-B
Regards, Roland
rrrjj