serialport

serialport.c

#define IOPORT_SERIALPORT_BASE  0x03f8


void serialport_sendString (const char* str){

 unsigned int i;

  asm_out8(IOPORT_SERIALPORT_BASE+1, 0x00);
  asm_out8(IOPORT_SERIALPORT_BASE+3, 0x80);
  asm_out8(IOPORT_SERIALPORT_BASE+0, 0x03);
  asm_out8(IOPORT_SERIALPORT_BASE+1, 0x00);
  asm_out8(IOPORT_SERIALPORT_BASE+3, 0x03);
  asm_out8(IOPORT_SERIALPORT_BASE+2, 0xc7);
  asm_out8(IOPORT_SERIALPORT_BASE+4, 0x0b);


  for(i=0; str[i] != '\0'; i++){

    asm_out8(IOPORT_SERIALPORT_BASE, str[i]);
    while(!((asm_in8(IOPORT_SERIALPORT_BASE+5)>>5)&1));
  }

  return;
}