26 lines
576 B
C
26 lines
576 B
C
#include <stdio.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <sys/cpu.h>
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void drain_keyboard(void)
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{
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/* Prevent "ghost typing" and keyboard buffer snooping */
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volatile char junk;
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int rv;
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do {
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rv = read(0, (char *)&junk, 1);
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} while (rv > 0);
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junk = 0;
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cli();
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*(volatile uint8_t *)0x419 = 0; /* Alt-XXX keyboard area */
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*(volatile uint16_t *)0x41a = 0x1e; /* Keyboard buffer empty */
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*(volatile uint16_t *)0x41c = 0x1e;
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memset((void *)0x41e, 0, 32); /* Clear the actual keyboard buffer */
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sti();
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}
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