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Note you must have a tape attached to mta2 this will get symbols of disk load.
start sim.
i7090 ctss.ini
sim> att com # Attach com controller.
sim> at cr0 mit.crd System to load command.
sim> bo dk0 Boot LDTSS.
MIT8C0--THE DATE AND TIME ARE 0118712326.2
HALT instruction, IC: 00131 ( 076000000016 LMTM)
sim> dep sw 3 To not start backup and FIB on bootup.
sim> dep sw 0 To start both.
sim> c

To Shutdown.
^E
sim> dep keys 40017 this logs everyone off.
sim> c

^E after READ KEYS message.
sim> dep keys 0
sim> c

`^E`  
`sim> dep keys 40032              After all users logged out.`  
`sim> c`  
 `KEYS READ. 000000040032  AT  2334.3`  
 `CTSS IS FINISHED. YOU MAY NOW CLEAR CORE.`  
`HALT instruction, IC: 02651 (  000000002651   HTR 02651)`  
`sim>                             It is safe now to exit sim.`