On 12/14/2017 6:47 AM, Noel Chiappa wrote:
> From: John Welch
> CLR
> 765000
> LAD
> EXAM
> 'Bus Err' light comes on.
Oooh, that's very interesting, and illuminative. The ROM isn't working (so
there's no way for the software console to work - its code is in that ROM).
So look at Section 1.5 of the Technical Manual
http://bitsavers.org/pdf/dec/unibus/M9312_TechRef.pdf
Will do. I have 4 M9312 cards. One I know I pulled from an 11/04, the
others from 11/04 or 11/34 (or 11/34a)
[...]
Also, while we're at it, it's probably worth making sure the CPU will
run. Do this:
CLR
LAD
777 (This is a 'branch .' instruction)
DEP
EXAM (Should display '777')
CLR (I think you can dispense with these
LAD two, but just to be safe...)
CTRL-START
'Run' light should come on
CTRL-HALT
'Run' light should go out, should display '0' (or maybe '2', I forget)
It read 000000
> Do you know which color wire (red, clear, black) goes to which festoon
> connector (TP1, TP2, TP3, TP4)?
I would leave them all disconnected for the moment; you don't need them. One
is the 'boot' switch on the console, and its ground. The other is the 'boot on
power on enable' (a duplicate of S1-2), and its ground. Since we're trying to
manually start the ROM console from the front console, they aren't needed for
that.
I don't recall offhand which one connects to which - I will have to check.
> Don't want to blow anything up.
Not sure it will harm anything if you connect things wrongly, but that's
not tested.
Noel
--
Sincerely,
John Welch
281-353-4706 Home
713-725-7017 Cell
:qw
