Initial download from archive

http://web.archive.org/web/20210423124630/https://github.com/jdah/tetris-os/blob/master/README.md

src/sound.h

@@ -0,0 +1,50 @@
+#ifndef SOUND_H
+#define SOUND_H
+
+#include "util.h"
+
+#define NUM_NOTES 8
+
+#define NUM_OCTAVES 7
+#define OCTAVE_SIZE 12
+
+#define OCTAVE_1 0
+#define OCTAVE_2 1
+#define OCTAVE_3 2
+#define OCTAVE_4 3
+#define OCTAVE_5 4
+#define OCTAVE_6 5
+#define OCTAVE_7 6
+
+#define NOTE_C      0
+#define NOTE_CS     1
+#define NOTE_DF     NOTE_CS
+#define NOTE_D      2
+#define NOTE_DS     3
+#define NOTE_EF     NOTE_DS
+#define NOTE_E      4
+#define NOTE_F      5
+#define NOTE_FS     6
+#define NOTE_GF     NOTE_FS
+#define NOTE_G      7
+#define NOTE_GS     8
+#define NOTE_AF     NOTE_GS
+#define NOTE_A      9
+#define NOTE_AS     10
+#define NOTE_BF     NOTE_AS
+#define NOTE_B      11
+
+#define NOTE_NONE   12
+
+#define WAVE_SIN        0
+#define WAVE_SQUARE     1
+#define WAVE_NOISE      2
+#define WAVE_TRIANGLE   3
+
+void sound_init();
+void sound_note(u8 index, u8 octave, u8 note);
+void sound_master(u8 v);
+void sound_volume(u8 index, u8 v);
+void sound_wave(u8 index, u8 wave);
+
+#endif