13 Feb
2017
13 Feb
'17
5:41 p.m.
If you have a M7856 which is a SLU and LTC on one board you don?t need an
M787.
I assume that they you have the EIS board installed, you have the 3 jumper
cables between the EIS and the uCode board.
KM11s will help in diagnosing these issues as it allows you to single step
through the uCode.
TTFN - Guy
On Feb 13, 2017, at 8:16 AM, william degnan
<billdegnan at gmail.com> wrote:
Question - I am working on a PDP 11 KE11E M7238 EIS board (for PDP 11/40)
which causes the CPU to crash when installed; front panel not responsive,
can't boot XXDP. I installed a removable jumper so I can flip jumper
configs back and forth between EIS installed/not installed. Without the
EIS the system works fine, can boot OS's that do not require it like RT11.
As discussed before the EIS is required if I want to boot up UNIX 6 on the
11/40, which is a goal of mine.
Thought - I don't have a LW11L, M787 installed. This is a the Line TIme
Clock option card. Do you think that maybe the EIS board requires this for
some reason, even though there are no references to this as a requirement
in any docs I can find? Maybe the docs writers assume it's installed? I
only wonder because any time I have seen the M7238 installed in an 11/40 I
have also seen a M787.
I could swap out the current 11/40 backplane with a backplane that has the
jumpers for the M787 already removed, but I only want to do this if it's
necessary. When we were talking before I neglected to mention I had no
M787, you may have assumed I did.
Bill