28 Jul
2000
28 Jul
'00
12:12 a.m.
I also have a 16K core set, does anyone have any
information on that
board? The highgate docs appear to be for a hex wide 16k board.
My scan on highgate is the 8/A version. I didn't know a DEC 16k was available
for the 8/E, was this third party?. What are the board numbers?
I think I have the 8k prints but they weren't where I though they should so
will look further this weekend.
Digital numbered the MSB (high) 0 always so EMA 0 is the 0/16k field select
bit. On the 4k core when the link is in it selects a 0 for that line.
Chapter 9 in the 8/E handbook on highgate documents the omnibus signals
and section 4 pg 3-60 of the mantenance manual vol I documents the memory.
Section 5 pg 3-93/3-96 documents the front panel. Several front panel
schematics are also there.
David Gesswein
http://www.pdp8.net/ -- Old computers with blinkenlights