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CLR1 (SPC700): Difference between revisions
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'''CLR1''' is an [[SPC700]] command that clears | '''CLR1''' is an [[SPC700]] command that clears a bit in a [[direct page]] byte. The byte following the opcode determines which byte. The high nibble of the opcode determines which bit within that byte. | ||
=== See Also === | === See Also === | ||
Revision as of 20:18, 22 July 2023
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| y2 | 2 bytes | 4 cycles | |||||
| Flags Clobbered | |||||||
|---|---|---|---|---|---|---|---|
| N | V | P | B | H | I | Z | C |
| . | . | . | . | . | . | . | . |
CLR1 is an SPC700 command that clears a bit in a direct page byte. The byte following the opcode determines which byte. The high nibble of the opcode determines which bit within that byte.
See Also
External Links
- Official Nintendo documentation on CLR1: Appendix C-9 of Book I