int single_drive_flag;       /*global flag used by SetFloppy()*/

/* return 1 if single floppy system, else return 0 */

int SingleDrive(void)
{
   char FloppyPresent, FloppyNumber;
   FloppyPresent = peekb(0x40,0x10) & 1;
   FloppyNumber = ((peekb(0x40,0x10) & 0xC0) >> 6) + 1;
   single_drive_flag = (FloppyPresent && (FloppyNumber == 1)) ? 1 : 0;
   return single_drive_flag;
}

void SetFloppy(char *filename)
{
   char disk_name;
   if(single_drive_flag)
   {
      if(filename[1]==':')                /*If a drive was specified,*/
         disk_name=toupper(filename[0]);  /*get the letter.*/
      else
         disk_name=getdisk()+0x41;   /*Else get default drive just in case.*/
      if(disk_name=='A')
         pokeb(0x50,4,0);            /* Adjust byte at 0050:0004h as needed.*/
      else if(disk_name=='B')
         pokeb(0x50,4,1);
   }
}
