Format of HQCOORD parameter block:
Offset	Size	Description	)
 00h	WORD	0004h (length of following data)
 02h	BYTE	(ret) coordinate format
		bits 7-4: bytes per coordinate
		bits 3-0: fraction bytes in coordinate
 03h	BYTE	(ret) relative coordinate format
		bits 7-4: bytes per coordinate
		bits 3-0: fraction bytes in coordinate
 04h	BYTE	(ret) number of dimensions (2-4)
 05h	BYTE	(ret) test results
		bit 7: coordinate format not supported
		bit 6: relative coordinate format not supported
		bit 5: specified dimension not supported