gtpi1m4b | System Installation Support Reference |
The recoup chain chase exit, BRU2, is called by BRSH, the recoup restart segment, if chain chasing was in progress before the system was IPLed. BRSH determines if the RCP tape is open and the sequence number (BK0SQN) is nonzero. If so, BRU2 is entered. Otherwise, recoup is restarted from the beginning.
BRU2 must be able to determine if user chain chasing was in progress. If so, it must determine where it should restart from. If user chain chasing was not in progress, BRU2 must return to allow BRSH to decide where in TPF recoup to restart from.
Input
Programming Considerations