INT 21,44,0 / IOCTL,0 - Get Device Information

	AH = 44h
	AL = 00
	BX = handle (must be an opened device)


	on return
	AX = error code if CF set  (see DOS ERROR CODES)
	DX = device information  (see tables below)


	|F|E|D|C|B|A-8|7|6|5-0|  DX  Block Device Information
	 | | | | |  |  | |  `----- drive number (0=A:,1=B:)
	 | | | | |  |  | `------- 0 = file has been written
	 | | | | |  |  `-------- 0 = disk file; 1 = character device
	 | | | | |  `---------- reserved, must be zero
	 | | | | `------------ 1 = media not removable
	 | | | `------------- 1 = network device (DOS 3.x+)
	 | | `-------------- 1 = reserved
	 | `--------------- 1 = don't update file time or date (DOS 4.x+)
	 `---------------- 1 = file is remote (DOS 3.x+)

	|F|E|D|C|B|A-8|7|6|5|4|3|2|1|0|  DX  Character Device Information
	 | | | | |  |  | | | | | | | `---- 1 = standard input device
	 | | | | |  |  | | | | | | `---- 1 = standard output device
	 | | | | |  |  | | | | | `---- 1 = NUL device
	 | | | | |  |  | | | | `---- 1 = clock device
	 | | | | |  |  | | | `---- uses DOS INT 29 for fast character output
	 | | | | |  |  | | `---- 1 = binary mode, 0 = translated
	 | | | | |  |  | `---- 0 = end of file on input
	 | | | | |  |  `---- 1 = character device, 0 if disk file
	 | | | | |  `----- reserved
	 | | | | `------ 1 = media not removable
	 | | | `------ 1 = network device (DOS 3.x+)
	 | | `------ reserved
	 | `------ 1 = supports IOCTL, via functions 2 & 3
	 `------ reserved


	- BIT 7 of register DX can be used to detect if STDIN/STDOUT is
	  redirected to/from disk; if a call to this function has DX BIT 7
	  set it's not redirected from/to disk; if it's clear then it is
	  redirected to/from disk
	- BIT B of register DX can be used to determine if a drive is
	  removable.