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DBNZ (SPC700): Difference between revisions
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'''DBNZ''' is an [[SPC700]] instruction that decrements memory or the [[Y index register]] and then jumps if that value is nonzero. | |||
=== See Also === | === See Also === |
Revision as of 17:40, 13 July 2023
Basic Info | |||||||
---|---|---|---|---|---|---|---|
Addressing Mode | Opcode | Length | Speed | ||||
6E | 3 bytes | when condition is false: 5 cycles
when condition is true: 7 cycles |
|||||
FE | 2 bytes | when condition is false: 4 cycles
when condition is true: 6 cycles |
Flags Affected | |||||||
---|---|---|---|---|---|---|---|
N | V | P | B | H | I | Z | C |
. | . | . | . | . | . | . | . |
DBNZ is an SPC700 instruction that decrements memory or the Y index register and then jumps if that value is nonzero.
See Also
External Links
- Official Super Nintendo development manual on DBNZ: Appendix C-8 of Book I