Define verb ZRHOSTremot
  Image sys$system:ZRhostremot.exe
  Parameter p1,prompt="ZRn:",value(required,type=$device),label=UNIT
  qualifier ASSIGN
  qualifier DEASSIGN
  qualifier NOSPC
  qualifier NOWRITE
!  qualifier CLEAR
! Note: CLEAR switch is for ZRHOST.MAR only. It just zeroes the
! reference count of the ZR: unit in case aborting control tasks
! left this nonzero.
!; Uses ZRHOST image to create a memory disk for ZR0: (test case) or generally...
! nospc means no create/delete/truncate/extend
! nowrite means no write virt/log/phy
! For safe use remotely must have at least NOSPC for r/w mount. To spec
! NOWRITE makes it safer still, inhibiting overwrite.