LOOP (Super FX): Difference between revisions

Revision as of 23:40, 1 July 2024


Basic Info
Addressing Mode	Opcode	Length	ROM Speed	RAM Speed	Cache Speed
Implied	3C	1 byte	3 cycles	3 cycles	1 cycle


Flags Affected
B	ALT1	ALT2	O/V	S	CY	Z
0	0	0	.		.

LOOP is a Super FX instruction that decrements R₁₂. If the zero flag is set afterwards, R₁₅ is incremented. Otherwise, R₁₃ is stored to R₁₅.

The next instruction after LOOP is already loaded into the pipeline.

Official Nintendo documentation on LOOP: paragraph 9.54 on page 2-9-77 of Book II

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