Action !

Here are a few mpeg clips of the Real Console in action. If you click on the picture, your viewer for mepgs is started.

Stand-Alone pattern #2Stand-Alone pattern #3 Stand-Alone pattern #4Boot / run RT-11

Stand-Alone pattern #2

walking light, 6 LEDs
from left to right,
starting again at the left side.
Some switches are ON, so they are "echoed" on the ADDRESS LEDs.


Stand-Alone pattern #3

walking light, 1 to 6 LEDs
starting with 1 LED from left and right side, moving to the center, bouncing and moving back to the sides where an extra LED is added.


Stand-Alone pattern #4

walking light, 5 to 1 LEDs
starting with 5 LEDs at the left side, moving to the right, bouncing and moving back to the other side where one LED is turned off.


Boot / run RT-11

° start in Stand-Alone mode
° initialising console
° booting RT-11
° halting RT-11 via console
° Step a few instructions
° "HALT", -> "ENABLE"
    and then "CONT"
° activity during .DIR command
° "HALT" again.

The clips "pattern #3", pattern #4", and "running" all start just after the Real Console is reset. You can see the power-up sequence:

  1. after reset, all LEDs are turned off.
  2. The software reads the position of the switches 2, 1, and 0.
    The position of these 3 switches is used to determine which Stand-Alone pattern will start.
  3. The position of the switches 2, 1, and 0 is displayed on the ADDRESS LEDs.
    Regardless of the position of all other switches, the ADDRESS LEDs 17 - 3 remain off.
  4. The Real Console starts the selected Stand-Alone pattern on the DATA LEDs.
  5. The position of all switches 17 - 0 is shown on the ADDRESS LEDs.
    The FUNCTION switches/toggles are "echoed" to the STATUS LEDs.

 

 
  x0x2x4x6
001000012701174400012761000013
001010000004012711000004105711
001020100376005061000002005061
001030000004012761177400000006
001040012711000014105711100376
001050005007      

Bootstrap code for RL02
I started SIMH with the command line "pdp11  RT11cons.ini" in a 'CMD' box. The "RT11cons.ini" file has the following lines:

SET CPU URH11
SET RL0 RL02
ATTACH RL0 C:\Apps\simh_rt11\RT11work.dsk
REALCONS 1 10

I used the Real Console to load the bootstrap program in memory.

  • Set the switches to 001000.
  • Push the "LOAD ADRS" toggle.
  • Set the switches to the data listed in the table,
    and use the "DEP" toggle to deposit the data.
  • Set the switches to 001000, and push "LOAD ADRS".
  • Finally, push the "START" toggle.
  • On the console you will see the following lines:

    PDP-11 simulator V3.2-0
    Disabling XQ
    sim>
     
    RT-11XM (S) V05.03
     
    . _

You could simply enter "boot rl0" at the sim> prompt, instead of using the Real Console to boot RT-11,
but where is the fun in that?   Why build a Real Console ...?


homebrew 11/40 system - sleak version

 
The dimensions of the front : As you can see, the length of the console is defined by the number of switches.
I left out the 2 white "switches" at both ends of the row of switches of the *real* PDP-11/35 console.

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