NOT Programming Interface Information
NOT Programming Interface Information

UCB Prefix Area

This segment resides below or above 16 megabytes depending on the UCB location that you specify for the HCD device definition. The UCB prefix area is always the X'200' bytes preceding the UCB common segment. Therefore, if a UCB common segment is at address N, you can base the UCB on address N-X'200'. Use the IEFUCBOB mapping macro to map the UCB prefix area.

Parent topic: Obtaining UCB addresses
End NOT Programming Interface Information
End NOT Programming Interface Information