Owner`s manual

5.23 UNJAM
The console program accepts the UNJAM command.
However, UNJAM has no effect on the system, since this
system does not have an independent I/O bus reset option.
Example
>>> UNJAM ! Enter UNJAM command.
>>> ! Console prompt returns.
! UNJAM has no effect on the
! system.
5–64 VAX 6000 Series Owner’s Manual