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
55
56
57
58
59
60
61
|
/* console_cur.c - console functions */
#include <system.h>
#include <console.h>
unsigned char console_flags = 0;
unsigned short console_cur_pos = 0;
unsigned char console_std_attr = 0x07;
unsigned char console_akt_char_attr = 0;
unsigned char cur_blink_counter = 0;
void console_cursor_on() {
if(console_flags & FLAG_BLINK_ON) {console_flags &= ~FLAG_BLINK_ON; console_cur_blink();}
}
void console_cursor_off() {
if(console_flags & FLAG_BLINK_ON) {console_cur_blink(); console_flags |= FLAG_BLINK_ON;}
}
void console_cur_blink() {
if(console_flags & FLAG_BLINK_ON) {
console_flags &= ~FLAG_BLINK_ON;
asm (
"push %es\n"
"push %ebx\n"
"mov $32,%ax\n"
"mov %ax,%es\n"
"xor %ebx,%ebx\n"
"mov console_cur_pos,%bx\n"
"shl $1,%ebx\n"
"inc %ebx\n"
"mov console_akt_char_attr,%al\n"
"mov %al,%es:(%ebx)\n"
"pop %ebx\n"
"pop %es"
);
}
else {
console_flags |= FLAG_BLINK_ON;
asm (
"push %es\n"
"push %ebx\n"
"mov $32,%ax\n"
"mov %ax,%es\n"
"xor %ebx,%ebx\n"
"mov console_cur_pos,%bx\n"
"shl $1,%ebx\n"
"inc %ebx\n"
"mov console_std_attr,%al\n"
"rol $4,%al\n"
"and $0b01110111,%al\n"
"mov %es:(%ebx),%ah\n"
"mov %ah,console_akt_char_attr\n"
"mov %al,%es:(%ebx)\n"
"pop %ebx\n"
"pop %es"
);
}
}
|
