SET1 (SPC700)

Basic Info
Addressing Mode	Opcode	Length	Speed
Direct Page Bit	02	2 bytes	4 cycles
Direct Page Bit	22	2 bytes	4 cycles
Direct Page Bit	42	2 bytes	4 cycles
Direct Page Bit	62	2 bytes	4 cycles
Direct Page Bit	82	2 bytes	4 cycles
Direct Page Bit	A2	2 bytes	4 cycles
Direct Page Bit	C2	2 bytes	4 cycles
Direct Page Bit	E2	2 bytes	4 cycles

Flags Affected
N	V	P	B	H	I	Z	C
.	.	.	.	.	.	.	.

SET1 is an SPC700 command that sets a bit in a direct page byte. The byte following the opcode determines which byte. The most significant 3 bits of the opcode determines which bit within that byte. In Nintendo's manual, the high nybble of the opcode is called x and bit 4 of the opcode is always zero.

No flags are affected.

Syntax

SET1 dip. bit

See Also

• CLR1
• TSET1
• SMB
• dip bit

External Links

• Official Nintendo documentation on SET1: Table C-18 in Appendix C-9 of Book I
• subparagraph 8.2.3.1 of page 3-8-8, lbid.
• Appendix C-1
• http://www.ffviman.fr/switch-snes/sf-sound.html
• anomie: https://github.com/yupferris/TasmShiz/blob/master/spc700.txt#L572