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
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
#ident "$Id$"
/* ----------------------------------------------------------------------- *
*
* Copyright 2001 H. Peter Anvin - All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, Inc., 53 Temple Place Ste 330,
* Bostom MA 02111-1307, USA; either version 2 of the License, or
* (at your option) any later version; incorporated herein by reference.
*
* ----------------------------------------------------------------------- */
/*
* conio.c
*
* Output to the screen
*/
#include <stdint.h>
#include "conio.h"
int putchar(int ch)
{
if ( ch == '\n' ) {
/* \n -> \r\n */
asm volatile("movw $0x0e0d,%%ax ; "
"movw $0x0007,%%bx ; "
"int $0x10"
::: "eax", "ebx", "ecx", "edx",
"esi", "edi", "ebp");
}
asm volatile("movw $0x0007,%%bx ; "
"int $0x10"
:: "a" ((uint16_t)(0x0e00|(ch&0xff)))
: "eax", "ebx", "ecx", "edx",
"esi", "edi", "ebp");
return ch;
}
int puts(const char *s)
{
int count = 0;
while ( *s ) {
putchar(*s);
count++;
s++;
}
return count;
}
|
