keyboard.c

#include "io.h"

#define KEYBOARD_DATA_PORT 0x60

/** read_scan_code:
 *  Reads a scan code from the keyboard
 *
 *  @return The scan code (which is NOT an ASCII character!)
 */
unsigned char keyboard_read_scan_code(void){
    return inb(KEYBOARD_DATA_PORT);
}

unsigned char keyboard_scan_code_to_ascii(unsigned char scan_code){
    unsigned char ascii[256] =
    {
        0x0, 0x0, '1', '2', '3', '4', '5', '6',         // 0 - 7
        '7', '8', '9', '0', '-', '=', 0x0, 0x0,         // 8 - 15
        'q', 'w', 'e', 'r', 't', 'y', 'u', 'i',         // 16 - 23
        'o', 'p', '[', ']', '\n', 0x0, 'a', 's',        // 24 - 31
        'd', 'f', 'g', 'h', 'j', 'k', 'l', ';',         // 32 - 39
        '\'', '`', 0x0, '\\', 'z', 'x', 'c', 'v',       // 40 - 47
        'b', 'n', 'm', ',', '.', '/', 0x0, '*',         // 48 - 55
        0x0, ' ', 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,         // 56 - 63
        0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, '7',         // 64 - 71
        '8', '9', '-', '4', '5', '6', '+', '1',         // 72 - 79
        '2', '3', '0', '.'                              // 80 - 83
    };

    return ascii[scan_code];
}