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MICROPROCESSOR INSTRUCTION REFERENCE->TST
TST Test Memory, zero or minus
M - 00
Condition Code Register:
C Reset Always
V Reset Always
Z Set if result Zero, else cleared
N Set if result Negative, else cleared
I Not affected
H Not affected
Addressing mode | Assembler syntax |
Index X: | TST <exprn.>,X |
Index Y: | TST <exprn.>,Y |
Extend: | TST <exprn.> |