IPC for VMS
IPC is the 'Interrupt Priority Level C' program and is used for adjusting quorum, canceling mount verification or dropping into XDELTA. Normally it is invoked on a real VAX using a sequence like:
[Ctrl/P] >>> D/I 14 C >>> CONT IPC>
but this is not possible with Simh (especially with the 11/780 where there is no console program). Instead the following sequence can be used:
[Ctrl/E] sim> D SISR FFC0 sim> CONT IPC>
See the OpenVMS System Manager's Manual for full documentation on IPC.