W65C02S Datasheet, PDF (20/40 Pages) List of Unclassifed Manufacturers – Microprocessor

The Western Design Center, Inc.
W65C02S Data Sheet
Table 4-1 Addressing Mode Table
Address Mode
1. Absolute a
2. Absolute Indexed Indirect (a,x)
3. Absolute Indexed with X a,x
4. Absolute Indexed with Y a,y
5. Absolute Indirect (a)
6. Accumulator A
7. Immediate #
8. Implied i
9. Program Counter Relative r
10. Stack s
11. Zero Page zp
12. Zero Page Indexed Indirect (zp,x)
13. Zero Page Indexed with X zp,x
14. Zero Page Indexed with Y zp,y
15. Zero Page Indirect (zp)
16. Zero Page Indirect Indexed with Y (zp),y
Instruction Times in Memory
Cycle
Original
NMOS 6502
W65C02S
4 (3)
4 (3)
5
5
4 (1,3)
4 (1,3)
4 (1)
4 (1)
4 (3)
4 (3)
2
2
2
2
2
2
2 (2)
2 (2)
3-7
3-7
3 (3)
3 (3)
6
6
4 (3)
4 (3)
4
4
-
5
5
5
Memory Utilization in Number of
Program Sequence Bytes
Original
NMOS 6502
W65C02S
3
3
3
3
3
3
3
3
3
3
1
1
2
2
1
1
2
2
1-3
1-4
2
2
2
2
2
2
2
2
-
2
2
2
Notes: (indicated in parenthesis)
1. Page boundary, add 1 cycle if page boundary is crossed when forming address
2. Branch taken, add 1 cycle if branch is taken
3. Read-Modify-Write, add 2 cycles
The Western Design Center, Inc.
W65C02S Data Sheet
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