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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4973 | right-hear | 1 | /* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */ |
| 2 | #include |
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| 3 | #include |
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| 4 | |||
| 5 | void sound(int freq) |
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| 6 | { |
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| 7 | int scale; |
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| 8 | if (freq == 0) |
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| 9 | { |
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| 10 | outportb(0x61, inportb(0x61) & ~3); |
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| 11 | return; |
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| 12 | } |
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| 13 | scale = 1193046 / freq; |
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| 14 | outportb(0x43, 0xb6); |
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| 15 | outportb(0x42, scale & 0xff); |
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| 16 | outportb(0x42, scale >> 8); |
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| 17 | outportb(0x61, inportb(0x61) | 3); |
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| 18 | } |