7 May
2014
7 May
'14
5 p.m.
On May 7, 2014, at 4:20 PM, Guy Sotomayor <ggs at shiresoft.com> wrote:
I went and checked and there are 2 S-Bus cables between the CPU cabinet
and the I/O cabinet. The MF20's as far as I can tell are connected from the
I/O cabinet using the X-Bus as Eric described but there's still the requirement
to get the signals from the CPU which still requires two BC20C cables.
Is there a high quality picture or scan of the M9006 paddle? Or does someone
have BC20C's that I could either borrow (to clone) or that I could purchase?
TTFN - Guy
On May 7, 2014, at 3:57 PM, Eric Smith <spacewar at gmail.com> wrote:
I found the print for the KW20. Ugh!
Anyone have one that they're willing to part with? I'll pay $$'s. ;-)
The KW20 was not used on core-based systems, and
was introduced with the
MF20 semiconductor memory, so the drawings for the KW20 master oscillator
are in the MF20 and MG20 print sets, which are on Bitsavers.
I've been through the print sets and all I've found is the block diagrams. If
you can
point me to the specific doc then I'll look for it there.
The 2065 (or any KL10 with internal MF20/MG20 MOS memory) does not have an
Sbus. It has Xbus instead. The Sbus translators (M8519) in slots 7 and 8
of the CPU backplane are replaced by Xbus translators (M8581, unless you
have a mixed core/MOS system). The Sbus cables and paddles (slots 2 and 3)
are replaced by an Xbus cable that uses an M8572 paddle (schematic and
component placement in the MF20 print set). The Xbus cabling looks similar
to VAX SBI cabling. I'm pretty sure you got at least one M8572/cable
assembly from me, when we were scrounging for missing parts.
Yes, I have that assembly. That was critical too. But I think there are other
cases where the S-Bus is used and I need the cables for that. As I recall the
other uses don't involve talking to memory (I/O?).