PM Opc RET

RET = Return from routine

Hex	Mnemonic	Cycles
F8	RET	16
F9	RETI	16
FA	RETSKIP	16

Execute

F        = Register F
U/V      = Register U or V
SP       = Register SP (Stack Pointer)
PC       = Register PC (Program Counter)

; RET (Return from a subroutine)

V = Memory[SP+2]
PC = (Memory[SP+1] SHL 8) + Memory[SP]
SP = SP + 3

; RETI (Return from an interrupt)

V = Memory[SP+3]
PC = (Memory[SP+2] SHL 8) + Memory[SP+1]
F = Memory[SP]
SP = SP + 4

; RETSKIP (Return from a subroutine and skip 2 bytes)

V = Memory[SP+2]
PC = (Memory[SP+1] SHL 8) + Memory[SP] + 2
SP = SP + 3

Description

Return from a subroutine or an interrupt.

Conditions

None

Examples

 ; A = 0x10
 ; B = 0x10
 CALL somefunction
 ; A = 0x11
 ; B = 0x0F

 (...)

somefunction:
 INC A
 DEC B
 RET
 INC A  ; Never executed

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