1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/cpu.h>
void drain_keyboard(void)
{
/* Prevent "ghost typing" and keyboard buffer snooping */
volatile char junk;
int rv;
do {
rv = read(0, (char *)&junk, 1);
} while (rv > 0);
junk = 0;
cli();
*(volatile uint8_t *)0x419 = 0; /* Alt-XXX keyboard area */
*(volatile uint16_t *)0x41a = 0x1e; /* Keyboard buffer empty */
*(volatile uint16_t *)0x41c = 0x1e;
memset((void *)0x41e, 0, 32); /* Clear the actual keyboard buffer */
sti();
}
|
