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Diffstat (limited to 'macros.asm')
| -rw-r--r-- | macros.asm | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/macros.asm b/macros.asm index a35b833df..a9948ae6a 100644 --- a/macros.asm +++ b/macros.asm @@ -191,3 +191,14 @@ ENDC ENDM +sine_wave: MACRO +; \1: amplitude + +x = 0 + rept $20 + ; Round up. + dw (sin(x) + (sin(x) & $ff)) >> 8 +x = x + \1 * $40000 + endr +ENDM + |