Function  44h   I/O Control for Devices (IOCTL)  Get or Set Device Information

entry   AH      44h 

	AL	01h	Set Device Information (DH must be zero for this call)

			DX bits:  

			0    1  console input device 

			1    1  console output device 

			2    1  null device 

			3    1  clock device 

			4    1  reserved 

			5    0  binary mode - don't check for control chars 

			     1  cooked mode - check for control chars 

			6    0  EOF - End Of File on input 

			7       device is character device if set, if not, EOF 

			        is 0 if channel has been written, bits 0-5 are  

			        block device number 

			12      network device 

			14   1  can process control strings (AL 2-5, can only be 

			        read, cannot be set) 

			15   n  reserved