Once we have the time reading code working for V6, it's nice to be able to set the system clock when the system boots.
I decided to use the paper tape reader for this. A call to timecmd.py writes a date setting command to the ptr file by adding
!timecmd.pyjust before the boot rk0 statement. The ! prefix to the simulator runs a command. The paper tape reader is now ready to read the tape contents.
It's read by the settime.sh script that should be installed in /etc, it reads the paper tape onto a file in /tmp and execute the date command. To make this work at bootstrap time, add a call to settime.sh to the start of /etc/rc to set the clock.