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Upgrade the maximum number of SFX instruments permitted #406

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Upgrade the maximum number of SFX instruments permitted #406

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abd409d
Upgrade the maximum number of SFX instruments permitted
KungFuFurby Oct 12, 2023
27ea6ce
Add changelog entry reflecting the SFX instrument expansion
KungFuFurby Oct 12, 2023
8450e34
Categorize changelog entry
KungFuFurby Oct 13, 2023
6624da3
Forgot a UL HTML tag in readme changelog categorization
KungFuFurby Oct 13, 2023
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23 changes: 14 additions & 9 deletions asm/main.asm
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Original file line number Diff line number Diff line change
Expand Up @@ -1219,20 +1219,25 @@ FetchPtrFromSFXDataAndRET:

SetSFXInstrument:
mov y, #$09 ; \
mul ya ; | Set up the instrument table for SFX
mov x, a ; |
mul ya ; | Set up the instrument table for SFX
mov $14, #SFXInstrumentTable ; |
mov $15, #SFXInstrumentTable>>8 ; |
addw ya, $14 ; |
movw $14, ya ; |
mov y, #$00 ; |
mov a, $46 ; | \
xcn a ; | | Get the correct DSP register "base" into y.
lsr a ; | |
mov y, a ; | /
mov $12, #$08 ; / 9 bytes of instrument data.
mov x, a ; / /
- ; \
mov a, SFXInstrumentTable+x ; |
call DSPWrite ; | Loop that sets various DSP registers.
mov a, ($14)+y ; |
mov $f2, x ; | Loop that sets various DSP registers.
mov $f3, a ; |
inc x ; |
inc y ; |
dbnz $12, - ; /
mov a, SFXInstrumentTable+x ; \
inc y ; |
cmp y, #$08 ; | 9 bytes of instrument data.
bcc - ; /
mov a, ($14)+y ; \
mov x, $46 ; | Set pitch base multiplier.
mov $0210+x, a ; /
mov a, #$00 ; \ Disable sub-tuning
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8 changes: 8 additions & 0 deletions readme_files/changelog.html
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Expand Up @@ -208,6 +208,14 @@ <h2>Version 1.0.9 - 2023-08-28</h2>
</ul>
</li>
</ul>
<h2>Version 1.0.10 Alpha - 2023-10-12</h2>
<ul>
<li>SFX
<ul>
<li>"Upgraded the maximum number of SFX instruments available from 28 (due to an 8-bit index offset limitation) to 128." - KungFuFurby</li>
</ul>
</li>
</ul>

<br><br>

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