| /programs/develop/libraries/menuetlibc/src/libc/pc_hw/sound/sound.c |
|---|
| 0,0 → 1,18 |
| /* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */ |
| #include <pc.h> |
| #include <assert.h> |
| void sound(int freq) |
| { |
| int scale; |
| if (freq == 0) |
| { |
| outportb(0x61, inportb(0x61) & ~3); |
| return; |
| } |
| scale = 1193046 / freq; |
| outportb(0x43, 0xb6); |
| outportb(0x42, scale & 0xff); |
| outportb(0x42, scale >> 8); |
| outportb(0x61, inportb(0x61) | 3); |
| } |