TVFIX stuffs the TV-11 and then tells ITS to start using it. 6FIX
tells ITS to start using the PDP-6.
They are intended to be used by linking CHANNA; RAHASH TVFIX or 6FIX
to SYS; TS LOCK.
The two pages starting with the APINF label seems incomplete. There
are missing symbols and the pages end with .VALUE ;INCOMPLETE. They
are present in version 558, but not 524.
ITS configuration has the Rubin 10-11 in the 3,,0-3,,777777 range.
The documentation says it's one moby lower.
Two more PDP-11s were attached at some point.
Since we're interacting with ITS through the system console, one cause
of build failures is the messages the system job prints to the console
at unpredictable times -- for example, periodic timestamps and
notifications of changes to files in system directories. If one of these
gets printed while we're expecting something else, it's hard for the
Expect script to recover.
Avoid this by patching STYO, the system job's character-printing
routine, to return without doing anything if this system is up.
Adjust the pdset routine so it's matching PDSET's output rather than the
system job's to tell when the time has been set.
Doing expect_after before a child process has been spawned causes Expect
to try reading from stdin. If stdin is /dev/null, it gets an EOF from
the read, assumes it's been closed... and closes stdout too, so we don't
see any more of the child process interaction.
When shutting down the emulator and starting another, it's otherwise
possible for the first read from the new emulator to return an error
(EIO from the pty read in Expect).
On my machine the expect script fails to see the ". words" because the "." is
separated by a newline and the message "IT IS NOW..." (time) followed by a newline with "words". Chnaged from ". words" to "words".
Resolves#1134.
This avoids problems when the full path to the build directory has
spaces in it; make needs spaces in target/dependency names to be quoted.
If the paths are all relative, then we only need to use $(CURDIR) (and
quote carefully) when adjusting PATH, etc.
