Difference between revisions of "Expand the music index from $94 to $9F"
From Sonic Retro
(Created page with '{{GuideBy|lukeusher123}} To add more music slots to the sound test, search for this code in the level select routine: <asm>LevSel_NoCheat: cmpi.w #$94,d0 ; is soun…') |
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<asm> cmpi.w #$94,d0 ; is sound $80-$94 being played?</asm> | <asm> cmpi.w #$94,d0 ; is sound $80-$94 being played?</asm> | ||
So it reads: | So it reads: | ||
| − | <asm> cmpi.w #$9F,d0 ; is sound $80-$ | + | <asm> cmpi.w #$9F,d0 ; is sound $80-$9F being played?</asm> |
Then rebuild the rom. | Then rebuild the rom. | ||
And now the sound test will have the music slots going up to $9F, instead of $94, however attempts to play empty music slots will crash the sound driver, and possibly lock up the emulator. So, make sure you include a song in every slot. | And now the sound test will have the music slots going up to $9F, instead of $94, however attempts to play empty music slots will crash the sound driver, and possibly lock up the emulator. So, make sure you include a song in every slot. | ||
[[Category:SCHG_How-tos|Expand the music index from $94 to $9F]] | [[Category:SCHG_How-tos|Expand the music index from $94 to $9F]] | ||
Revision as of 16:28, 22 January 2010
(Original guide by lukeusher123)
To add more music slots to the sound test, search for this code in the level select routine: <asm>LevSel_NoCheat:
cmpi.w #$94,d0 ; is sound $80-$94 being played?
bcs.s LevSel_PlaySnd; if yes, branch
cmpi.w #$A0,d0 ; is sound $95-$A0 being played?
bcs.s LevelSelect; if yes, branch</asm>
Change the line: <asm> cmpi.w #$94,d0 ; is sound $80-$94 being played?</asm> So it reads: <asm> cmpi.w #$9F,d0 ; is sound $80-$9F being played?</asm> Then rebuild the rom.
And now the sound test will have the music slots going up to $9F, instead of $94, however attempts to play empty music slots will crash the sound driver, and possibly lock up the emulator. So, make sure you include a song in every slot.