#define WHITE_TXT 0x07
extern void k_main();
void k_clear_screen();
unsigned int k_printf(char *message, unsigned int line);
void update_cursor(int row, int col);

extern void k_main() // like main in a normal C program
{
        k_clear_screen();
        k_printf("Hi!\nHow's this for a starter OS?", 0);
};

void k_clear_screen() // clear the entire text screen
{
        char *vidmem = (char *) 0xb8000;
        unsigned int i=0;
        while(i < (80*25*2))
        {
                vidmem[i]=' ';
                i++;
                vidmem[i]=WHITE_TXT;
                i++;
        };
};

unsigned int k_printf(char *message, unsigned int line) // the message and then the line #
{
        char *vidmem = (char *) 0xb8000;
        unsigned int i=0;
        i=(line*80*2);
        while(*message!=0)
        {
                if(*message=='\n') // check for a new line
                {
                         line++;
                         i=(line*80*2);
                         message++;
                } else {
                         vidmem[i]=*message;
                         message++;
                         i++;
                         vidmem[i]=WHITE_TXT;
                         i++;
                };
        };
        return(1);
};