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To patch ITS while it's running, first type sys$j to get the sysjob. This job has the core image of the ITS monitor, but it's write-protected by default. To unprotect it, type $$^R.

To get a directory listing, type ^R m.f.d. (file). Or run PEEK on the 340 display (type ^Y) and type D.

To make a new directory, say foobar, type ^R foobar; ..new. (udir). Unless on a really old ITS… in which case you must patch the ITS location NUFDTB with the sixbit name of the directory, and then access a file in it.