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SET1 (SPC700): Difference between revisions

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SET1 is an [[SPC700]] command that sets the direct page flag.
{| class="wikitable" style="float:right;clear:right;width:40%"
!colspan="8"|Basic Info
|+
|'''Addressing Mode'''
|'''Opcode'''
|'''Length'''
|'''Speed'''
|+
|[[Direct Page Bit Addressing | Direct Page Bit]]
|02
|2 bytes
|4 cycles
|+
|[[Direct Page Bit Addressing | Direct Page Bit]]
|22
|2 bytes
|4 cycles
|+
|[[Direct Page Bit Addressing | Direct Page Bit]]
|42
|2 bytes
|4 cycles
|+
|[[Direct Page Bit Addressing | Direct Page Bit]]
|62
|2 bytes
|4 cycles
|+
|[[Direct Page Bit Addressing | Direct Page Bit]]
|82
|2 bytes
|4 cycles
|+
|[[Direct Page Bit Addressing | Direct Page Bit]]
|A2
|2 bytes
|4 cycles
|+
|[[Direct Page Bit Addressing | Direct Page Bit]]
|C2
|2 bytes
|4 cycles
|+
|[[Direct Page Bit Addressing | Direct Page Bit]]
|E2
|2 bytes
|4 cycles
|}
 
{| class="wikitable" style="float:right;clear:right;width:30%"
!colspan="8"|Flags Affected
|+
|[[Negative Flag|N]]
|[[Overflow Flag|V]]
|[[Direct Page Flag|P]]
|[[Break Flag|B]]
|[[Half-Carry Flag|H]]
|[[Interrupt Enable Flag|I]]
|[[Zero Flag|Z]]
|[[Carry Flag|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 ====
<pre>
SET1 dip. bit
</pre>
 
=== See Also ===
* [[CLR1]]
* [[TSET1]]
* [[SMB]]
* [[dip bit]]
 
=== External Links ===
* Official Nintendo documentation on SET1: Table C-18 in [https://archive.org/details/SNESDevManual/book1/page/n234 Appendix C-9 of Book I]
* subparagraph 8.2.3.1 of [https://archive.org/details/SNESDevManual/book1/page/n186 page 3-8-8], lbid.
* [https://archive.org/details/SNESDevManual/book1/page/n226 Appendix C-1]
* http://www.ffviman.fr/switch-snes/sf-sound.html
* anomie: https://github.com/yupferris/TasmShiz/blob/master/spc700.txt#L572


[[Category:ASM]]
[[Category:ASM]]
[[Category:SPC700]]
[[Category:SPC700]]
[[Category:Bit Operation Commands]]
[[Category:Bit Operation Commands]]
[[Category:Read-Modify-Write Instructions]]
[[Category:Two-byte Instructions]]

Latest revision as of 04:25, 8 August 2024

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

External Links