1 #include <stdio.h>

2 #include "vid.h"

3 #include "term.h"

4 #include <asmops.h>

5 #include "segm.h"

6

7 /* special keys */

8 enum {

9 LALT, RALT,

10 LCTRL, RCTRL,

11 LSHIFT, RSHIFT,

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

13 CAPSLK, NUMLK, SCRLK, SYSRQ,

14 ESC = 27,

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

16 NUM_DOT, NUM_ENTER, NUM_PLUS, NUM_MINUS, NUM_MUL, NUM_DIV,

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

18 BACKSP = 127

19 };

20

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

22 static int keycodes[] = {

23 0, ESC, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=', '\b', /* 0 - e */

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

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

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

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

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

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

30 0, 0, 0, 0, 0, 0, 0, /* 59 - 5f */

31 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 60 - 6f */

32 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 /* 70 - 7f */

33 };

34

35 void kmain(void)

36 {

37 clear_scr();

38 puts("kernel starting up");

39

40 init_segm();

41

42 set_text_color(YELLOW);

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

44 set_text_color(LTGRAY);

45 puts("hello world!");

46

47 for(;;) {

48 char c, keypress;

49 do {

50 inb(keypress, 0x64);

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

52 inb(c, 0x60);

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

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

55 }

56 }

57 }