The fields of the
The protection key determines if information can be stored
or fetched from a particular location.
Extended control mode.
The machine check flag is set to 1 if machine check
interruptions are enabled.
The wait state flag is set to 1 when the
The problem state flag is set to 1 when the
operating in the proble. rather than the supervisor
The condition code reflects the result of a previous
arithmetic, logical, or
The program .ask indicates whether or not various program
exceptions are allowed to cause program interrupts.
The instruction address gives the location of the next
instruction to be executed for program interrupts or of
the instruction last executed for external interrupts.
The Extended Control