16 bit Assembly
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IDIV - Divide Instruction
The IDIV instruction is used to divide AX by the second operand.
If the operand is 16 bit then the result is in DX:AX. If the operand if 8 bit the the result is in AH:AL.
This command has 2 parts, Instruction, then either a Register or a memory address.
| Assembly Sample | Description | 16 bit Machine Code |
|---|---|---|
| IDIV BL | ; Divides AL by an 8 bit Register | F6 F8 |
| IDIV BX | ; Divides AX by a 16 bit Register | F7 F8 |
| IDIV [BX] | ; Divides AX by a memory address | F7 3F |
| IDIV [BX+2] | ; Divides AX by a memory address | F7 3F 02 |
Last Update 14/02/2023