30 Dec
2003
30 Dec
'03
11:21 p.m.
My recently acquired 11/34 has a few missing parts :
the boot proms of the M9301 and the M7850 parity board.
It does have 16K mos memory and the full programmer panel.
However, when I fire it up, I cannot halt the processor, the RUN light
stays on.
Could this be due to the missing parts ?
And of course, to complement the system, I am looking for the following
parts :
- the missing items of course
- an unibus RL11 controller. Are these rare ?
- Some more memory.
Jos Dreesen , Zurich Switzerland
31 Dec
31 Dec
9:41 a.m.
My recently acquired 11/34 has a few missing parts :
the boot proms of the M9301 and the M7850 parity board.
It does have 16K mos memory and the full programmer panel.
However, when I fire it up, I cannot halt the processor, the RUN light
stays on.
Could this be due to the missing parts ?
Not normally. This is normally due to an open grant chain (either a
missing continuity card, or a misisng wirewrap NPG jumper). Pull the
M9302 terminator (I assume you've got everything in one box, no long
Unibus cables). The machine will just about run with the bus unterminated
at the far end. If you can then halt the CPU, you've got the well-known
grant problem.
-tony
1 Jan
1 Jan
10:44 a.m.
On Wed, 2003-12-31 at 05:21, Jos Dreesen wrote:
My recently acquired 11/34 has a few missing parts :
the boot proms of the M9301 and the M7850 parity board.
It does have 16K mos memory and the full programmer panel.
However, when I fire it up, I cannot halt the processor, the RUN light
stays on.
I had this problem on my 11/34a and it turned out to be the console
board. Putting in a new one fixed it and I could do things (ie enter,
examine and run programs).
But before you do that, you do know how the programmer panel operates?
(ie you have to press control and halt to get it to halt).
Could this be due to the missing parts ?
And of course, to complement the system, I am looking for the following
parts :
- the missing items of course
- an unibus RL11 controller. Are these rare ?
- Some more memory.
Jos Dreesen , Zurich Switzerland
--
TTFN - Guy
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