1 #include <stdio.h>

2 #include "vid.h"

3 #include "term.h"

4 #include <asmops.h>

5 #include "segm.h"

6 #include "intr.h"

7

8 /* special keys */

9 enum {

10 LALT, RALT,

11 LCTRL, RCTRL,

12 LSHIFT, RSHIFT,

13 F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12,

14 CAPSLK, NUMLK, SCRLK, SYSRQ,

15 ESC = 27,

16 INSERT, DEL, HOME, END, PGUP, PGDN, LEFT, RIGHT, UP, DOWN,

17 NUM_DOT, NUM_ENTER, NUM_PLUS, NUM_MINUS, NUM_MUL, NUM_DIV,

18 NUM_0, NUM_1, NUM_2, NUM_3, NUM_4, NUM_5, NUM_6, NUM_7, NUM_8, NUM_9,

19 BACKSP = 127

20 };

21

22 /* table with rough translations from set 1 scancodes to ASCII-ish */

23 static int keycodes[] = {

24 0, ESC, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=', '\b', /* 0 - e */

25 '\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n', /* f - 1c */

26 LCTRL, 'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'', '`', /* 1d - 29 */

27 LSHIFT, '\\', 'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/', RSHIFT, /* 2a - 36 */

28 NUM_MUL, LALT, ' ', CAPSLK, F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, /* 37 - 44 */

29 NUMLK, SCRLK, NUM_7, NUM_8, NUM_9, NUM_MINUS, NUM_4, NUM_5, NUM_6, NUM_PLUS, /* 45 - 4e */

30 NUM_1, NUM_2, NUM_3, NUM_0, NUM_DOT, SYSRQ, 0, 0, F11, F12, /* 4d - 58 */

31 0, 0, 0, 0, 0, 0, 0, /* 59 - 5f */

32 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 60 - 6f */

33 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 /* 70 - 7f */

34 };

35

36 void kmain(void)

37 {

38 clear_scr();

39 puts("kernel starting up");

40

41 init_segm();

42 init_intr();

43

44 set_text_color(YELLOW);

45 puts("<initialization code goes here>");

46 set_text_color(LTGRAY);

47 puts("hello world!");

48

49 asm volatile("int $0x80");

50

51 for(;;) {

52 char c, keypress;

53 do {

54 inb(keypress, 0x64);

55 } while(!(keypress & 1));

56 inb(c, 0x60);

57 if(!(c & 0x80)) {

58 putchar(keycodes[(int)c]);

59 }

60 }

61 }