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3cba2a8a78
Hook this up in Terminal so that the '\a' character generates a beep. Finally emit an '\a' character in the shell line editing code when backspacing at the start of the line.
33 lines
654 B
C++
33 lines
654 B
C++
#pragma once
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#include <AK/Types.h>
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#define TICKS_PER_SECOND 1000
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/* Timer related ports */
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#define TIMER0_CTL 0x40
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#define TIMER1_CTL 0x41
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#define TIMER2_CTL 0x42
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#define PIT_CTL 0x43
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/* Building blocks for PIT_CTL */
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#define TIMER0_SELECT 0x00
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#define TIMER1_SELECT 0x40
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#define TIMER2_SELECT 0x80
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#define MODE_COUNTDOWN 0x00
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#define MODE_ONESHOT 0x02
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#define MODE_RATE 0x04
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#define MODE_SQUARE_WAVE 0x06
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#define WRITE_WORD 0x30
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#define BASE_FREQUENCY 1193182
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namespace PIT {
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void initialize();
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dword ticks_this_second();
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dword seconds_since_boot();
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}
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