6502微处理器硬件资料.txt
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TXT
1,167 行
| Implied | RTS | 60 | 1 | 6 |
+----------------+-----------------------+---------+---------+----------+
SBC SBC Subtract memory from accumulator with borrow SBC
-
Operation: A - M - C -> A N Z C I D V
- / / / _ _ /
Note:C = Borrow (Ref: 2.2.2)
+----------------+-----------------------+---------+---------+----------+
| Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
+----------------+-----------------------+---------+---------+----------+
| Immediate | SBC #Oper | E9 | 2 | 2 |
| Zero Page | SBC Oper | E5 | 2 | 3 |
| Zero Page,X | SBC Oper,X | F5 | 2 | 4 |
| Absolute | SBC Oper | ED | 3 | 4 |
| Absolute,X | SBC Oper,X | FD | 3 | 4* |
| Absolute,Y | SBC Oper,Y | F9 | 3 | 4* |
| (Indirect,X) | SBC (Oper,X) | E1 | 2 | 6 |
| (Indirect),Y | SBC (Oper),Y | F1 | 2 | 5 |
+----------------+-----------------------+---------+---------+----------+
* Add 1 when page boundary is crossed.
SEC SEC Set carry flag SEC
Operation: 1 -> C N Z C I D V
_ _ 1 _ _ _
(Ref: 3.0.1)
+----------------+-----------------------+---------+---------+----------+
| Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
+----------------+-----------------------+---------+---------+----------+
| Implied | SEC | 38 | 1 | 2 |
+----------------+-----------------------+---------+---------+----------+
SED SED Set decimal mode SED
N Z C I D V
Operation: 1 -> D _ _ _ _ 1 _
(Ref: 3.3.1)
+----------------+-----------------------+---------+---------+----------+
| Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
+----------------+-----------------------+---------+---------+----------+
| Implied | SED | F8 | 1 | 2 |
+----------------+-----------------------+---------+---------+----------+
SEI SEI Set interrupt disable status SED
N Z C I D V
Operation: 1 -> I _ _ _ 1 _ _
(Ref: 3.2.1)
+----------------+-----------------------+---------+---------+----------+
| Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
+----------------+-----------------------+---------+---------+----------+
| Implied | SEI | 78 | 1 | 2 |
+----------------+-----------------------+---------+---------+----------+
STA STA Store accumulator in memory STA
Operation: A -> M N Z C I D V
_ _ _ _ _ _
(Ref: 2.1.2)
+----------------+-----------------------+---------+---------+----------+
| Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
+----------------+-----------------------+---------+---------+----------+
| Zero Page | STA Oper | 85 | 2 | 3 |
| Zero Page,X | STA Oper,X | 95 | 2 | 4 |
| Absolute | STA Oper | 80 | 3 | 4 |
| Absolute,X | STA Oper,X | 90 | 3 | 5 |
| Absolute,Y | STA Oper, Y | 99 | 3 | 5 |
| (Indirect,X) | STA (Oper,X) | 81 | 2 | 6 |
| (Indirect),Y | STA (Oper),Y | 91 | 2 | 6 |
+----------------+-----------------------+---------+---------+----------+
STX STX Store index X in memory STX
Operation: X -> M N Z C I D V
_ _ _ _ _ _
(Ref: 7.2)
+----------------+-----------------------+---------+---------+----------+
| Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
+----------------+-----------------------+---------+---------+----------+
| Zero Page | STX Oper | 86 | 2 | 3 |
| Zero Page,Y | STX Oper,Y | 96 | 2 | 4 |
| Absolute | STX Oper | 8E | 3 | 4 |
+----------------+-----------------------+---------+---------+----------+
STY STY Store index Y in memory STY
Operation: Y -> M N Z C I D V
_ _ _ _ _ _
(Ref: 7.3)
+----------------+-----------------------+---------+---------+----------+
| Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
+----------------+-----------------------+---------+---------+----------+
| Zero Page | STY Oper | 84 | 2 | 3 |
| Zero Page,X | STY Oper,X | 94 | 2 | 4 |
| Absolute | STY Oper | 8C | 3 | 4 |
+----------------+-----------------------+---------+---------+----------+
TAX TAX Transfer accumulator to index X TAX
Operation: A -> X N Z C I D V
/ / _ _ _ _
(Ref: 7.11)
+----------------+-----------------------+---------+---------+----------+
| Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
+----------------+-----------------------+---------+---------+----------+
| Implied | TAX | AA | 1 | 2 |
+----------------+-----------------------+---------+---------+----------+
TAY TAY Transfer accumulator to index Y TAY
Operation: A -> Y N Z C I D V
/ / _ _ _ _
(Ref: 7.13)
+----------------+-----------------------+---------+---------+----------+
| Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
+----------------+-----------------------+---------+---------+----------+
| Implied | TAY | A8 | 1 | 2 |
+----------------+-----------------------+---------+---------+----------+
TSX TSX Transfer stack pointer to index X TSX
Operation: S -> X N Z C I D V
/ / _ _ _ _
(Ref: 8.9)
+----------------+-----------------------+---------+---------+----------+
| Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
+----------------+-----------------------+---------+---------+----------+
| Implied | TSX | BA | 1 | 2 |
+----------------+-----------------------+---------+---------+----------+
TXA TXA Transfer index X to accumulator TXA
N Z C I D V
Operation: X -> A / / _ _ _ _
(Ref: 7.12)
+----------------+-----------------------+---------+---------+----------+
| Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
+----------------+-----------------------+---------+---------+----------+
| Implied | TXA | 8A | 1 | 2 |
+----------------+-----------------------+---------+---------+----------+
TXS TXS Transfer index X to stack pointer TXS
N Z C I D V
Operation: X -> S _ _ _ _ _ _
(Ref: 8.8)
+----------------+-----------------------+---------+---------+----------+
| Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
+----------------+-----------------------+---------+---------+----------+
| Implied | TXS | 9A | 1 | 2 |
+----------------+-----------------------+---------+---------+----------+
TYA TYA Transfer index Y to accumulator TYA
Operation: Y -> A N Z C I D V
/ / _ _ _ _
(Ref: 7.14)
+----------------+-----------------------+---------+---------+----------+
| Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
+----------------+-----------------------+---------+---------+----------+
| Implied | TYA | 98 | 1 | 2 |
+----------------+-----------------------+---------+---------+----------+
+------------------------------------------------------------------------
| INSTRUCTION ADDRESSING MODES AND RELATED EXECUTION TIMES
| (in clock cycles)
+------------------------------------------------------------------------
A A A B B B B B B B B B B C
D N S C C E I M N P R V V L
C D L C S Q T I E L K C S C
Accumulator | . . 2 . . . . . . . . . . .
Immediate | 2 2 . . . . . . . . . . .
Zero Page | 3 3 5 . . . 3 . . . . . . .
Zero Page,X | 4 4 6 . . . . . . . . . . .
Zero Page,Y | . . . . . . . . . . . . . .
Absolute | 4 4 6 . . . 4 . . . . . . .
Absolute,X | 4* 4* 7 . . . . . . . . . . .
Absolute,Y | 4* 4* . . . . . . . . . . . .
Implied | . . . . . . . . . . . . . 2
Relative | . . . 2** 2** 2** . 2** 2** 2** 7 2** 2** .
(Indirect,X) | 6 6 . . . . . . . . . . . .
(Indirect),Y | 5* 5* . . . . . . . . . . . .
Abs. Indirect| . . . . . . . . . . . . . .
+-----------------------------------------------------------
C C C C C C D D D E I I I J
L L L M P P E E E O N N N M
D I V P X Y C X Y R C X Y P
Accumulator | . . . . . . . . . . . . . .
Immediate | . . . 2 2 2 . . . 2 . . . .
Zero Page | . . . 3 3 3 5 . . 3 5 . . .
Zero Page,X | . . . 4 . . 6 . . 4 6 . . .
Zero Page,Y | . . . . . . . . . . . . . .
Absolute | . . . 4 4 4 6 . . 4 6 . . 3
Absolute,X | . . . 4* . . 7 . . 4* 7 . . .
Absolute,Y | . . . 4* . . . . . 4* . . . .
Implied | 2 2 2 . . . . 2 2 . . 2 2 .
Relative | . . . . . . . . . . . . . .
(Indirect,X) | . . . 6 . . . . . 6 . . . .
(Indirect),Y | . . . 5* . . . . . 5* . . . .
Abs. Indirect| . . . . . . . . . . . . . 5
+-----------------------------------------------------------
* Add one cycle if indexing across page boundary
** Add one cycle if branch is taken, Add one additional if branching
operation crosses page boundary
------------------------------------------------------------------------+
INSTRUCTION ADDRESSING MODES AND RELATED EXECUTION TIMES |
(in clock cycles) |
------------------------------------------------------------------------+
J L L L L N O P P P P R R R
S D D D S O R H H L L O O T
R A X Y R P A A P A P L R I
Accumulator | . . . . 2 . . . . . . 2 2 .
Immediate | . 2 2 2 . . 2 . . . . . . .
Zero Page | . 3 3 3 5 . 3 . . . . 5 5 .
Zero Page,X | . 4 . 4 6 . 4 . . . . 6 6 .
Zero Page,Y | . . 4 . . . . . . . . . . .
Absolute | 6 4 4 4 6 . 4 . . . . 6 6 .
Absolute,X | . 4* . 4* 7 . 4* . . . .⌨️ 快捷键说明
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