NT68F62 datasheet(7/57 Pages) ETC1

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NT68F62

2. Instruction Set List

Instruction Code

Meaning

Operation

ADC

Add with carry

A + M + C → A, C

AND

Logical AND

A•M → A

ASL

Shift left one bit

C ← M7…M0 ← 0

BCC

Branch if carry clears

Branch on C ＝ 0

BCS

Branch if carry sets

Branch on C ＝ 1

BEQ

Branch if equal to zero

Branch on Z ＝ 1

BIT

Bit test

A•M, M7→N, M6→V

BMI

Branch if minus

Branch on N ＝ 1

BNE

Branch if not equal to zero

Branch on Z ＝ 0

BPL

Branch if plus

Branch on N ＝ 0

BRK

Break

Forced Interrupt PC+2↓ PC↓

BVC

Branch if overflow clears

Branch on V ＝ 0

BVS

Branch if overflow sets

Branch on V ＝ 1

CLC

Clear carry

0 → C

CLD

Clear decimal mode

0 → D

CLI

Clear interrupt disable bit

0 → I

CLV

Clear overflow

0 → V

CMP

Compare Accumulator to memory

A － M

CPX

Compare with index register X

X － M

CPY

Compare with index register Y

Y － M

DEC

Decrement memory by one

M － 1 → M

DEX

Decrement index X by one

X － 1 → X

DEY

Decrement index Y by one

Y － 1 → Y

EOR

Logical exclusive-OR

A ⊕ M→A

INC

Increment memory by one

M + 1 → M

INX

Increment index X by one

X + 1 → X

INY

Increment index Y by one

Y + 1 → Y

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