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ADC (SPC700): Difference between revisions
From SnesLab
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Revision as of 06:06, 24 July 2023
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Immediate | 88 | 2 bytes | 2 cycles | ||||
| Implied (type 1) | 86 | 1 byte | 3 cycles | ||||
| Direct Page | 84 | 2 bytes | 3 cycles | ||||
| Direct Page Indexed by X | 94 | 2 bytes | 3 cycles | ||||
| Absolute | 85 | 3 bytes | 4 cycles | ||||
| Absolute Indexed by X | 95 | 3 bytes | 5 cycles | ||||
| Absolute Indexed by Y | 96 | 3 bytes | 5 cycles | ||||
| Direct Page Indexed by X | 87 | 2 bytes | 6 cycles | ||||
| Direct Page Indirect Indexed by Y | 97 | 2 bytes | 6 cycles | ||||
| 99 | 1 byte | 5 cycles | |||||
| 89 | 3 bytes | 6 cycles | |||||
| Direct Page Immediate | 98 | 3 bytes | 5 cycles | ||||
| Flags Clobbered | |||||||
|---|---|---|---|---|---|---|---|
| N | V | P | B | H | I | Z | C |
| . | . | . | |||||
ADC (Add with Carry) is an SPC700 instruction that adds the value of the two operands together (along with the carry flag) and stores the sum in the left operand. Often, the left operand is the accumulator.
See Also
External Links
- Official Super Nintendo development manual on ADC: Appendix C-5 of Book I