16 bit Assembly

Home   Site Map   Instruction Index  

---

AND   - AND Bitwise Instruction

The AND Instruction performs and AND action with the second operand on the first operand.
The first operand holds the result of this operation. All matching bits set to 1 in both operands result in that bit being returned as a 1 otherwise the bit is set to 0.
This command has 3 parts, Instruction, then either operand can be a Register or Immediate value or a memory address.

However 2 memmory addresses cannot be used together.

Assembly Sample	Description	16 bit Machine Code
MOV AX, 0x02F2	;  Assign a value to AX	B8 F2 02
MOV BX, 0x0020	;  Set Address of BX	BB 20 00
MOV [BX], 0x0106	;  Assign a value to address at BX	C7 07 06 01
AND AX, 0x00F2	;  AND a 16 bit immediate to AX	25 F2 00
AND [BX], 0x00F2	;  AND a 16 bit immediate to an address	81 27 F2 00
AND AH, AL	;  AND two 8 bit Registers	22 C4
AND AX, BX	;  AND two 16 bit Registers	23 D8
AND [BX], AX	;  AND a Register to an Address	21 07
AND AX, [BX]	;  AND an address to a Register	23 07

---

Last Update 06/02/2023