diff options
Diffstat (limited to 'macros/data.asm')
| -rw-r--r-- | macros/data.asm | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/macros/data.asm b/macros/data.asm index b7a16190..775b6adc 100644 --- a/macros/data.asm +++ b/macros/data.asm @@ -71,10 +71,8 @@ MACRO dab ; dwb address, bank ENDM MACRO sine_table -; \1 samples of sin(x) from x=0 to x<32768 (pi radians) - DEF x = 0 - REPT \1 - dw (sin(x) + (sin(x) & $ff)) >> 8 ; round up - DEF x += DIV(32768, \1) ; a circle has 65536 "degrees" - ENDR +; \1 samples of sin(x) from x=0 to x<0.5 turns (pi radians) + for x, \1 + dw sin(x * 0.5 / (\1)) + endr ENDM |