16 bit Assembly
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PUSH - Stack Retrieval Instruction
The PUSH instructions are used to store the registers in the stack.
PUSH has 2 parts, the Instruction and an operand which can be either a Register, 16 bit immediate value, or a 16 bit memory address.
PUSHA has 1 part, the Instruction. It saves all the arithmetic Registers in the stack in the following sequence. AX, CX, DX, BX, SP, BP, SI, DI.
PUSHF has 1 part, the Instruction. It saves the Flags Register on the stack.
All other PUSH instructions save the register selected by the operand.
Stack items are retrieved using the POP instruction.
| Instruction | Code |
|---|---|
| PUSHF | 9C |
| PUSHA | 60 |
| PUSH AX | 50 |
| PUSH CX | 51 |
| PUSH DX | 52 |
| PUSH BX | 53 |
| PUSH SP | 54 |
| PUSH BP | 55 |
| PUSH SI | 56 |
| PUSH DI | 57 |
| PUSH ES | 06 |
| PUSH SS | 16 |
| PUSH CS | 0E |
| PUSH DS | 1E |
| PUSH FS | 0F A0 |
| PUSH GS | 0F A8 |
| PUSH 0x0303 | 68 03 00 |
| PUSH [BX] | FF 37 |
| PUSH [BX+2] | FF 77 02 |
Last Update 06/02/2023