daver2
10k Member
OK,
My brain is slowly melting...
I am setting up a PDP-11 system from bits to erase some disks. I will then reconfigure it to keep.
I have a 173QZ-C3 Micro PDP11/73 BA23 system box.
The CPU board is a quad QBUS M8190 (KDJ11-B).
The memory board is a quad QBUS M7551-AH (MSV11-QA) 1 MB Parity memory board.
I have the CPU board in slot 1 and the memory board in slot 3 (at the moment). It was in slot 2. I have also used three different memory boards (the other two being National Semiconductor 4MB parity memory) with the same results.
I have also a DLV11-J and RQDX3 installed.
Now to the problem...
On boot I get ERROR 47 (Memory CSR error).
If I bypass the error, I then get ERROR 46 (Memory error).
If I enter ODT, I can open, change and check a few random memory locations, and things seem fine. In addition, I can see the DLV11-J and RQDX3 controllers when I perform a MAP. I have installed a DLV11-J loop back, and can use ODT to transmit a character (by writing into the transmit buffer) and I can see it returned to the receive buffer (with the correct status).
Does anyone know:
1. What to check next?
2. How can I abandon the power-on diagnostics and get into dialogue mode? I don't appear to be able to skip the testing when an error occurs.
Does anyone need any more information?
Dave
My brain is slowly melting...
I am setting up a PDP-11 system from bits to erase some disks. I will then reconfigure it to keep.
I have a 173QZ-C3 Micro PDP11/73 BA23 system box.
The CPU board is a quad QBUS M8190 (KDJ11-B).
The memory board is a quad QBUS M7551-AH (MSV11-QA) 1 MB Parity memory board.
I have the CPU board in slot 1 and the memory board in slot 3 (at the moment). It was in slot 2. I have also used three different memory boards (the other two being National Semiconductor 4MB parity memory) with the same results.
I have also a DLV11-J and RQDX3 installed.
Now to the problem...
On boot I get ERROR 47 (Memory CSR error).
If I bypass the error, I then get ERROR 46 (Memory error).
If I enter ODT, I can open, change and check a few random memory locations, and things seem fine. In addition, I can see the DLV11-J and RQDX3 controllers when I perform a MAP. I have installed a DLV11-J loop back, and can use ODT to transmit a character (by writing into the transmit buffer) and I can see it returned to the receive buffer (with the correct status).
Does anyone know:
1. What to check next?
2. How can I abandon the power-on diagnostics and get into dialogue mode? I don't appear to be able to skip the testing when an error occurs.
Does anyone need any more information?
Dave