ZiLOG Z8 - Page 58

IRET
Interrupt Return
IRET
Instruction Format:
OPC
Operation:
Flags:
5-24
FLAGS <-- asp
sp <-- SP + 1
PC <-- asp
SP <-- SP + 2
IMR (7) <-- 1
Cycles
16
ope
(Hex)
SF
This instruction is issued at the end of an interrupt service routine. It restores
the Flag reqister (control register 252) and the PC. It also reenables any
interrupts that are potentially enabled.
All flags are restored to original settings (before interrupt occurred).