freemlib-neogeo

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Part of the Sound Driver master todo list (#2)

The system command list includes tempo changes, fade in/out, stop playback, and more. The commands themselves are between $00-$1F, with a few reserved slots.

The current list is maintained in docs/functions/sound/soundCommands.txt, but replicated here in Markdown format (it may have changed; please check the text file for the latest):

• $00 No Command
• $01 Slot change
• $02 Play eyecatch BGM (typically $5F)
• $03 Soft reset
• $04 Disable All (Music & Sounds)
• $05 Disable Music
• $06 Disable Sounds
• $07 Enable All (Music & Sounds)
• $08 Enable Music
• $09 Enable Sounds
• $0A Disable/Silence SSG (equiv. to SNK sound driver command $0F)
• $0B Disable/Silence FM
• $0C Stop all ADPCM-A samples
• $0D Stop ADPCM-B sample
• $0E Tempo Change [1 arg; $00-$FF = 0-255bpm]
• $0F --currently unassigned--
• $10 Fade Out [1 arg; speed $00-$FF]
• $11 Stop Fade In/Out
• $12 Fade In [1 arg; speed $00-$FF]
• $13 --currently unassigned--
• $14 --currently unassigned--
• $15 --currently unassigned--
• $16 --currently unassigned--
• $17 --currently unassigned--
• $18 --currently unassigned--
• $19 --currently unassigned--
• $1A --currently unassigned--
• $1B --currently unassigned--
• $1C (Data Collect (Z80 -> 68K)?)
• $1D (Data Transfer (68K -> Z80)?)
• $1E --currently unassigned--
• $1F --currently unassigned--

This list subject to change.