z80:Opcodes:XOR
From Learn @ Cemetech
XOR is an instruction that takes one 8-bit input and compares it with the accumulator. XOR is similar to Or, except for one thing: only 1 of the 2 test bits can be set or else it will result in a zero. The final answer is stored to the accumulator.
0 and 0 result: 0
0 and 1 result: 1
1 and 0 result: 1
1 and 1 result: 0
Syntax
XOR op8
Acceptable inputs
xor a xor b xor c xor d xor e xor h xor l xor ixh xor ixl xor iyh xor iyl xor (hl) xor (ix+n) xor (iy+n) xor n ;8 bit constant
Effects
C and N flags cleared. P/V is parity, and rest are modified by definition.
Uses
XORing numbers is used a lot to invert sprites and such. It is also very useful in bit-masking. See here for more information about bit-masking.
T-States
r denotes 8-bit register.
| r | 4 |
| X | 7 |
| (hl) | 7 |
| (ix+X) | 19 |
| (iy+X) | 19 |
See Also
AND,BIT,CCF,CPL,OR,RES,SCF,SET
