Zilog Z80380 - Manual (Page 175)

5-141
Z380 ™
U SER ' S M ANUAL Z ILOG
DC-8297-03
RETB
RETURN FROM BREAKPOINT
Operation: PC (31-0)
←
SPC (31-0)
This instruction is used to return to a previously executing procedure at the end of a
breakpoint. The contents of the Shadow Program Counter (SPC), which holds the address
of the next instruction of the previously executing procedure, are loaded into the Program
Counter (PC).
Note that maskable interrupts (if IEF1 is set) and non-maskable interrupt are enabled after
the instruction following RETB is executed.
Flags: S: Unaffected
Z: Unaffected
H: Unaffected
V: Unaffected
N: Unaffected
C: Unaffected
Addressing Execute
Mode Syntax Instruction Format Time Note
RETB 11101101 01010101 2