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authorRangi <35663410+Rangi42@users.noreply.github.com>2020-11-04 20:11:52 -0500
committerGitHub <noreply@github.com>2020-11-04 20:11:52 -0500
commited03fc4f4a3287a01647e528abba27aac1937de0 (patch)
tree32fef70a31af3a0b5ad2b0d34042c312574fb42d /macros/data.asm
parentMerge branch 'master' of https://github.com/pret/pokered (diff)
parentStart reorganizing pokeyellow (diff)
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Merge pull request #59 from Rangi42/master
Start reorganizing pokeyellow
Diffstat (limited to 'macros/data.asm')
-rwxr-xr-xmacros/data.asm9
1 files changed, 9 insertions, 0 deletions
diff --git a/macros/data.asm b/macros/data.asm
index 16742d53..3f18fb6e 100755
--- a/macros/data.asm
+++ b/macros/data.asm
@@ -78,3 +78,12 @@ dbbw: MACRO
db \1, \2
dw \3
ENDM
+
+sine_wave: MACRO
+; \1: amplitude
+x = 0
+REPT $20
+ dw (sin(x) + (sin(x) & $ff)) >> 8 ; round up
+x = x + (\1) * $40000
+ENDR
+ENDM