Computer Hardware User's Manual

CHAPTER 5 EXPLANATION OF INSTRUCTIONS

103

User's Manual U12326EJ4V0UM

Pop

POP

Pop

[Instruction format] POP dst

[Operation] When dst = rp When dst = PSW

dst

L ← (SP), dst ← (SP)

dst

H ← (SP+1), SP ← SP+1

SP ← SP+2

[Operand]

Mnemonic Operand(dst)

POP PSW

[Flag]

dst =rp PSW

Z AC CY Z AC CY

RRR

[Description]

• Data is returned from the stack to the register specified by the destination operand (dst).

• When the operand is PSW, each flag is replaced with stack data.

• None of interrupts are acknowledged between the POP PSW instruction and the subsequent instruction.

[Description example]

POP AX; The stack data is returned to the AX register.