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CLR1 (SPC700): Difference between revisions

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(two byte Instructions)
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=== External Links ===
=== External Links ===
* Official Nintendo documentation on CLR1: Table C-18 in [https://archive.org/details/SNESDevManual/book1/page/n234 Appendix C-9 of Book I]
* Official Nintendo documentation on CLR1: Table C-18 in [https://archive.org/details/SNESDevManual/book1/page/n234 Appendix C-9 of Book I]
* https://archive.org/details/SNESDevManual/book1/page/n186


[[Category:ASM]]
[[Category:ASM]]

Revision as of 05:10, 18 December 2023

Basic Info
Addressing Mode Opcode Length Speed
Direct Page 12 2 bytes 4 cycles
Direct Page 32 2 bytes 4 cycles
Direct Page 52 2 bytes 4 cycles
Direct Page 72 2 bytes 4 cycles
Direct Page 92 2 bytes 4 cycles
Direct Page B2 2 bytes 4 cycles
Direct Page D2 2 bytes 4 cycles
Direct Page F2 2 bytes 4 cycles
Flags Affected
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