Kind of 11/73 Console/SLU issue ...

[Schroeder]

Did not do that much with my PDP-11s, was more focused on my VAX systems. So, I forgot a lot about addresses and so on.

So, I thought. lets start with a simple setup to relearn...and now I'm stuck.

The backplane is A/B A/B with M3107 next to the CPU.
The front foto shows an SRAM memory card but now it uses the other card. I forget to set it to 18bit address when I took the first photo.

The CPU card does not complain about the DHQ-11 but I get no console. I tried different breakout panels but I just see some dirty characters when power on.

Using QBone to emulate a DL11 i get the @ prompt.

Does the DHQ-11 not support the console?

Btw. does one know how to start the DL11 on the QBone in background?

 

[daver2]

The console is only supported on a DL interface - not a DH or DV etc.

Ditto for a TU58 / serial bootstrap.

Every system should have a DLV11-J fitted... My suggestion...

Dave

 

[Schroeder]

The console is only supported on a DL interface - not a DH or DV etc.

Ditto for a TU58 / serial bootstrap.

Every system should have a DLV11-J fitted... My suggestion...

Dave

Thank you Dave, not the anwser I wanted ...

 

[daver2]

That I can't help. I could lie to you!

Dave

 

[wa2flq]

I've never see the built in hardware ODT console at anything other than 17777560-17777566 or their 16 or 18 bit equivalents.

That said, you don't need a DL/DLV-11 if there is ROM bootstrap code that can start the OS without it. We had many systems w/o a CRT or hardware terminal. But ou need a console serial port if you want to interact with the hardware ODT for debugging or other purposes.

 

[daver2]

Of course, if the machine 'crashes' to ODT, you are now blind...

Dave

 

[peclark]

Did not do that much with my PDP-11s, was more focused on my VAX systems. So, I forgot a lot about addresses and so on.

So, I thought. lets start with a simple setup to relearn...and now I'm stuck.

The backplane is A/B A/B with M3107 next to the CPU.
The front foto shows an SRAM memory card but now it uses the other card. I forget to set it to 18bit address when I took the first photo.

The CPU card does not complain about the DHQ-11 but I get no console. I tried different breakout panels but I just see some dirty characters when power on.

Using QBone to emulate a DL11 i get the @ prompt.

Does the DHQ-11 not support the console?

Btw. does one know how to start the DL11 on the QBone in background?

I just set this up myself...

If you go through the demo program, you go through the 'd' option, then 'en DL11' - and that's it...

If you add this to one of the .cmd files then you can enable the DL11 along with something like 'm i' for memory.

In autostart.sh, I reused the memory option (and changed it to option 0):

case $n in
0)
config_info="Just memory"
config_cmd="./memory.sh -aw 22 --leds $n"

memory.sh runs memory.cmd, here's what I changed in memory.cmd

# inputfile for demo to just emulate max memory
# Read in with command line option "demo --cmdfile ..."
d # device menu


pwr # reboot PDP-11
.wait 3000 # wait for PDP-11 to reset
en dl11
m i # install max memory

 

[Schroeder]

I've never see the built in hardware ODT console at anything other than 17777560-17777566 or their 16 or 18 bit equivalents.

That said, you don't need a DL/DLV-11 if there is ROM bootstrap code that can start the OS without it. We had many systems w/o a CRT or hardware terminal. But ou need a console serial port if you want to interact with the hardware ODT for debugging or other purposes.

Correct, and the DHQ11 ist set to that address. The CPU SLU LED is going off with that setting. That is why I hopped it might work with this one.

 

[daver2]

The DHQ11 is a multiplexed serial line unit. As such, there is a different programming interface to the bus.

Dave

 

[wa2flq]

Of course, if the machine 'crashes' to ODT, you are now blind...

Dave

The machines involved were specialized diagnosic clinical implementations. Support contracts (Marquette Electronics, now GE Healthcare) dealt with any failures.

However, we did extract some of the clinical data for research purposes. So I would routinely insert a DLVJ11, connect a CRT and TU58. I halted the machines, then toggled into the TU58 bootstrap for RT-11 to recover the information.

If Schroeder has an OS image that will boot w/o DL's and is configured for DH/DHQ/H/Z-11's it may be possible to skip the "normal" console. This might work on say, an Emulex UC07 or similar.