#include <bios.h>
#include <conio.h>

#define COM1  0
#define DATA_READY Ox100
#define TRUE   1
#define FALSE  0

#define SETTING ( 0x00 0xE0 0x00 0x03 )

int main(void)
{
  int in, out, status, DONE = FALSE;
  bioscom(0, SETTING, COM1);
  cprintf(". . . BIOSCOM [ESC] to exit . . .\n);
  while(!DONE)
  {
    status = bioscom(3, 0, com1);
    if (status & DATA_READY)
       if (( out = bioscom(2, 0, com1) & 0x7F) ! = 0)
         putch(out);
       if ( kbhit())
       {
           if ((in =getch()) == '\x1B')
              DONE = TRUE;
           bioscom(1, in, COM1);
       }
    }
    return 0;
}