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MICROPROCESSOR INSTRUCTION REFERENCE->TST

TST   Test Accumulator or Memory Byte
TSTA
TSTB
TST

A - 00   or   B - 00   or   M - 00


Condition Code Register:

H  Not affected
N  Set if result Negative, else cleared
Z  Set if result Zero, else cleared
V  Always cleared
C  Not affected (NB 6800 clears C)

    

Addressing mode	No of cycles	No of bytes
Implied:	2	1
Direct:	6	2
Extended:	7	3
Index/Indirect:	6+	2+