POP - Stack Retrieval Instruction

The POP instructions are used to load the registers with contents held in the stack.

If an attempt is made to remove more items from the stack than exist in the stack it will cause an exeption.

POPA restores the Registers in reverse order from PUSHA.

All other POP instructions load the register with the next available stack item in a last in first out order.

Stack items are stored using the PUSH instruction.

POP has 2 part, the Instruction and an operand which can be either a Register, 16 bit immediate value, or a 16 bit memory address.

POPA has 1 part, the Instruction. It retrieves all the previously saved Registers stored in the stack using PUSHA.

POPF has 1 part, the Instruction. It retrieves a previously saved Flags Register from the stack.

Instruction 16 bit Machine
Code

POPF 9D

POPA 61

POP AX 58

POP CX 59

POP DX 5A

POP BX 5B

POP SP 5C

POP BP 5D

POP SI 5E

POP DI 5F

POP ES 07

POP SS 17

POP DS 1F

POP FS 0F A1

POP GS 0F A9

POP [BX] 8F 37

POP [BX+2] 8F 77 02

Instruction	16 bit Machine Code
POPF	9D
POPA	61
POP AX	58
POP CX	59
POP DX	5A
POP BX	5B
POP SP	5C
POP BP	5D
POP SI	5E
POP DI	5F
POP ES	07
POP SS	17
POP DS	1F
POP FS	0F A1
POP GS	0F A9
POP [BX]	8F 37
POP [BX+2]	8F 77 02