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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.>