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--- its_console [2020/03/17 13:45]
lars
+++ its_console [2020/04/08 11:27] (current)
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@@ Line 9: / Line 9: @@
 You will have some lights and switches.  In addition to the normal functions, ITS has some more:
-The memory indicator lights show which job is running.  This can be disabled by setting MIPGDS to -1.
+The memory indicator lights show which job is running.  This can be disabled by setting MIPGDS to -1.  To control the lights from a user program, use .IOTLSR to enable IOT user mode and write to the lights register with DATAO PI,AC.
-Data switch 0 will make ITS go to NTS DDT.  This is very useful to set breakpoints etc, for debugging ITS.
+Data switch 0 will make ITS go to NTS DDT.  This is very useful to set breakpoints etc, for debugging ITS.  Switches can be read from a user program with DATAI APR,AC.
+On the PDP-6, the memory indicator lights are connected to speakers.