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| author | Bryan Bishop <kanzure@gmail.com> | 2013-09-09 19:51:29 -0700 |
|---|---|---|
| committer | Bryan Bishop <kanzure@gmail.com> | 2013-09-09 19:51:29 -0700 |
| commit | 0d6efda9bb3aa99cc9d28b9b9e7edaae121b7d75 (patch) | |
| tree | e804b9ed15832481d632904f42355743d9232515 /home/sine.asm | |
| parent | 6d7043c0c65161ad8ee97fa66b94beba86761d25 (diff) | |
| parent | 84a9b3907b9db08ee38e873554d8a6b4ac1b72b4 (diff) | |
Merge pull request #198 from yenatch/split-predefs-specials-stds
decouple home/ from engine/
Diffstat (limited to 'home/sine.asm')
| -rw-r--r-- | home/sine.asm | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/home/sine.asm b/home/sine.asm new file mode 100644 index 000000000..09d06ca89 --- /dev/null +++ b/home/sine.asm @@ -0,0 +1,22 @@ +Cosine: ; 1b0f +; Return d * cos(a) in hl + add $10 ; 90 degrees + +Sine: ; 1b11 +; Return d * sin(a) in hl +; a is a signed 6-bit value. + + ld e, a + + ld a, [hROMBank] + push af + ld a, BANK(_Sine) + rst Bankswitch + + call _Sine + + pop af + rst Bankswitch + ret +; 1b1e + |