AND loc16, AX
6-48
AND loc16, AX Bitwise AND
SYNTAX OPTIONS OPCODE OBJMODE RPT CYC
AND loc16, AX 1100 000A LLLL LLLL X − 1
Operands loc16 Addressing mode (see Chapter 5)
AX Accumulator high (AH) or accumulator low (AL) register
Description Perform a bitwise AND operation on the contents of the location pointed to by
the “loc16” addressing mode with the specified AX register. The result is
stored in location pointed to by ”loc16”:
[loc16] = [loc16] AND AX;
This is a read-modify-write operation.
Flags and
Modes
N
The load to [loc16] is tested for a negative condition. If bit 15 of [loc16] is 1,
then the negative flag bit is set; otherwise it is cleared.
Z
The load to [loc16] is tested for a zero condition. The zero flag bit is set if the
operation generates ([loc16] = 0); otherwise it is cleared.
Repeat This instruction is not repeatable. If this instruction follows the RPT
instruction, it resets the repeat counter (RPTC) and executes only once.
Example
; AND the contents of VarA with VarB and store in VarB:
MOV AL,@VarA ; Load AL with contents of VarA
AND @VarB,AL ; VarB = VarB AND AL
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