MOVB loc16,#8bit,COND
6-194
MOVB loc16,#8bit,COND Conditionally Save 8-bit Constant
SYNTAX OPTIONS OPCODE OBJMODE RPT CYC
MOVB loc16,#8bit,COND 0101 0110 1011 COND
CCCC CCCC LLLL LLLL
1 − 1
Operands loc16 Addressing mode (see Chapter 5)
#8bit 8-bit immediate constant value
COND Conditional codes:
COND Syntax Description Flags Tested
0000 NEQ Not Equal To Z = 0
0001 EQ Equal To Z = 1
0010 GT Greater Then Z = 0 AND N = 0
0011 GEQ Greater Then Or Equal To N = 0
0100 LT Less Then N = 1
0101 LEQ Less Then Or Equal To Z = 1 OR N = 1
0110 HI Higher C = 1 AND Z = 0
0111 HIS, C Higher Or Same, Carry Set C = 1
1000 LO, NC Lower, Carry Clear C = 0
1001 LOS Lower Or Same C = 0 OR Z = 1
1010 NOV No Overflow V = 0
1011 OV Overflow V = 1
1100 NTC Test Bit Not Set TC = 0
1101 TC Test Bit Set TC = 1
1110 NBIO BIO Input Equal To Zero BIO = 0
1111 UNC Unconditional −
Description If the specified condition being tested is true, then the 8-bit zero extended
constant is stored in the location pointed to by the “loc16” addressing mode:
if(COND = true) [loc16] = 0:8bit;
Note: Addressing modes are not conditionally executed; therefore, if an addressing mode
performs a pre- or post-modification, it will execute regardless of whether the condition
is true or not.
Flags and
Modes
N
If (COND = true AND loc16 = @AX), then after the move AX is tested for a
negative condition. The negative flag bit is set if bit 15 of AX is 1, otherwise it
is cleared.
Z
If (COND = true AND loc16 = @AX), then after the move, AX is tested for a
zero condition. The zero flag bit is set if AX = 0, otherwise it is cleared.
V
If the V flag is tested by the condition, then V is cleared.
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