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2.2.36 NOT (NOT = logical complement)
Operation
¬ Rd → Rd
Assembly-Language Format
NOT Rd
Operand Size
Byte
Condition Code
I
H
— —
—
—
I:
Previous value remains unchanged.
H:
Previous value remains unchanged.
N:
Set to 1 when the result is negative; otherwise cleared to 0.
Z:
Set to 1 when the result is zero; otherwise cleared to 0.
V:
Cleared to 0.
C:
Previous value remains unchanged.
Description
This instruction replaces the contents of an 8-bit general register with its one's complement
(subtracts the register contents from H'FF).
Instruction Formats and Number of Execution States
Addressing
mode
Mnem.
Register
NOT
direct
N
Z
V
C
∆
∆
—
0
Instruction code
Operands
1st byte 2nd byte 3rd byte 4th byte
Rd
1
7
0
rd
No. of
states
2
101
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