N-SPC Engine/Nintendo/Koji Kondo/SFX Sequence Format: Difference between revisions

Revision as of 18:15, 25 October 2020

The SFX sequence data is slightly modified compared to the standard N-SPC's voice command format. These are headerless, unlike a song, and they only support one channel at a time, with the channel used being fixed. Both games have almost the same command set except for VCMD $FF.

All SFX are initially handled at a tempo of $38.

VCMD ID	Description	Arguments
`$00`	End of SFX
`$01-$7F`	Note Duration	`xx`
`$80-$C5`	Note
`$C6-$CF`	Tie
`$D0-$D9`	Percussion
`$DA`	Instrument	`xx`
`$DB-$DC`	Invalid Note
`$DD`	Pitch Slide to Note	`xx yy zz aa`
`$DE-$EA`	Invalid Note
`$EB`	Note Pitch Envelope To	`xx yy zz`
`$EC-$FE`	Invalid Note
`$FF`	Restart SFX (Super Mario World CPUIO0)
`$FF`	Jump Back One Byte (Super Mario World CPUIO3)
`$FF`	Jump to SFX ID (Pilotwings)	`xx`

TODO VCMD documentation (some of them are identical to standard N-SPC)

@@ Line 4: / Line 4: @@
 The SFX sequence data is slightly modified compared to the standard N-SPC's voice command format. These are headerless, unlike a song, and they only support one channel at a time, with the channel used being fixed. Both games have almost the same command set except for VCMD <tt>$FF</tt>.
+All SFX are initially handled at a tempo of <tt>$38</tt>.
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