Hello,
I'm Andrea Galvani from Italy.
I've came in possession of a lot of PDP11 / 34 parts, from an italian electrical company department,
I hope you can help me in running this computers!
The parts and manuals, and various items are so much we had 2 vans full of things...
I'm trying now to start studying the first pdp11/34, and making some test, reading manuals and the web.
This system was, i think, a lot modified during the years, so i'm not sure what to use or not.
I'm trying to start from the beginning and exclude everything and make basilar test
on the single parts.
I still have no success on seeing a CPU running but i made some tests.
here the list of parts i have for now:
UNKNOWN CPU board with a DEC J11, (photos) called AH-10A-04 . i found no infos around registry address, etc ?
1x M8267
3x M8266
1x M8265 ( how to test for sure if working these cpu board ? )
2x M7859 ( i connected these to the bus and programer interface, and seems to work and load his switch register )
3x M7856 ( tried sending byte out, settings dip switch as instructions for my baud etc, I see signal on oscilloscope when depositng bits in 777566 in, but still unsuccesfull to see the character on the PC with a DB25 to DB9 serial. Connected the LA120 to pc and it works, i see char )
3x M7891 ram ? seems to works as i can put address and dep and load
1x M9202
1x M9312
1x M9302
nr 07 grand continuity card
1x M8716
1x M7819
1x M7485+M7486
1x M7547
2x M7792
1x M7867
1x RL02 unit
2x RL82 unit
The UNIBUS has CA1 and CB1 joined everythere aparts location #07 , wich i joined on the M7256 i put there.
Power Supply is OK +-15 and +5.
I connecteed JUST the M7859 programmer console board, and a ram M7891, plus M7303 in #09 and grant board where nothing.
When powered on, I always get a "BUS ERR" signal. Is it ok? I can access memory location and memoryzing in it.
If I put the unknow J11 cpu board, the system start with "BUS ERR" and work as usual, but if i press CTRL+START nothing appen.
If i press CTRL+HLT the "RUN" light goes on, and i have to turn off the system to make it off. Same has having not the cpu board inside.
I tried using M8265+M8266 cpu boards instead of the bigger one, but still no success in running istruction.
Are there any test, or signal path in the unibus, or something with the terminator / boot controller i need to test ?
I have confused ideas of what i really need to use to test basilar CPU istruction
Thank you! Hope to start infos exchange... we have really a lot of material to study...and lot more other PDP11 from other
pdp11 computer...
Andrea Galvani
I'm Andrea Galvani from Italy.
I've came in possession of a lot of PDP11 / 34 parts, from an italian electrical company department,
I hope you can help me in running this computers!
The parts and manuals, and various items are so much we had 2 vans full of things...
I'm trying now to start studying the first pdp11/34, and making some test, reading manuals and the web.
This system was, i think, a lot modified during the years, so i'm not sure what to use or not.
I'm trying to start from the beginning and exclude everything and make basilar test
on the single parts.
I still have no success on seeing a CPU running but i made some tests.
here the list of parts i have for now:
UNKNOWN CPU board with a DEC J11, (photos) called AH-10A-04 . i found no infos around registry address, etc ?
1x M8267
3x M8266
1x M8265 ( how to test for sure if working these cpu board ? )
2x M7859 ( i connected these to the bus and programer interface, and seems to work and load his switch register )
3x M7856 ( tried sending byte out, settings dip switch as instructions for my baud etc, I see signal on oscilloscope when depositng bits in 777566 in, but still unsuccesfull to see the character on the PC with a DB25 to DB9 serial. Connected the LA120 to pc and it works, i see char )
3x M7891 ram ? seems to works as i can put address and dep and load
1x M9202
1x M9312
1x M9302
nr 07 grand continuity card
1x M8716
1x M7819
1x M7485+M7486
1x M7547
2x M7792
1x M7867
1x RL02 unit
2x RL82 unit
The UNIBUS has CA1 and CB1 joined everythere aparts location #07 , wich i joined on the M7256 i put there.
Power Supply is OK +-15 and +5.
I connecteed JUST the M7859 programmer console board, and a ram M7891, plus M7303 in #09 and grant board where nothing.
When powered on, I always get a "BUS ERR" signal. Is it ok? I can access memory location and memoryzing in it.
If I put the unknow J11 cpu board, the system start with "BUS ERR" and work as usual, but if i press CTRL+START nothing appen.
If i press CTRL+HLT the "RUN" light goes on, and i have to turn off the system to make it off. Same has having not the cpu board inside.
I tried using M8265+M8266 cpu boards instead of the bigger one, but still no success in running istruction.
Are there any test, or signal path in the unibus, or something with the terminator / boot controller i need to test ?
I have confused ideas of what i really need to use to test basilar CPU istruction
Thank you! Hope to start infos exchange... we have really a lot of material to study...and lot more other PDP11 from other
pdp11 computer...
Andrea Galvani