MOVB AX.LSB, loc16
6-190
MOVB AX.LSB, loc16 Load Byte Value
SYNTAX OPTIONS OPCODE OBJMODE RPT CYC
MOVB AX.LSB, loc16 1100 011A LLLL LLLL X − 1
Operands AX.LS
B
Least significant byte of accumulator high (AH.LSB) or accumulator low
(AL.LSB) register
loc16 Addressing mode (see Chapter 5)
Description Load the least significant byte of the specified AX register (AH.LSB or
AL.LSB) with 8 bits from the location pointed to by the “loc16” addressing
mode. The most significant byte of AX is cleared. The form of the “loc16”
operand determines which of its 8 bits are used to load AX.LSB:
if(loc16 = *+XARn[offset])
{
if(offset is an even number)
AX.LSB = [loc16.LSB];
if(offset is an odd value)
AX.LSB = [loc16.MSB];
}
else
AX.LSB = [loc16.LSB];
AX.MSB = 0x00;
Note: offset = 3-bit immediate or AR0 or AR1 indexed addressing modes only.
For the following address modes, the returned result is undefined:
*AR6%++ (AMODE = 0)
*0++ (AMODE = x)
*0−− (AMODE = x)
*BR0++ (AMODE = x)
*BR0−− (AMODE = x)
*0++, ARPn (AMODE = 1)
*0−−, ARPn (AMODE = 1)
*BR0++, ARPn (AMODE = 1)
*BR0−−, ARPn (AMODE = 1)
Flags and
Modes
Z
After the move, AX is tested for a zero condition. The zero flag bit is set if
AX = 0; otherwise it is cleared
N
After the move, AX is tested for a negative condition. The bit is set if bit 15 of
AX is 1; otherwise it is cleared.
To Next Page
Loading...
Need help?
General
