INT 61 - Banyan VINES - UNIDENTIFIED DRIVE SPECIFIC FUNCTION                    
	AX = 0004h subfn 001Bh
	DS:DX -> request block (see #03426)
Return: AX = status
	    0000h success
	    0034h drive not connected
	    0037h drive number out of range
Desc:	The purpose of this function is not known.


Format of request block:
Offset	Size	Description	(Table 03426)
 00h	WORD	001Bh
 02h	BYTE	drive number (0=default, 1=A:, ...)
 03h	BYTE	???
 04h	WORD	???
 06h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	far pointer to data area
 0Ah	WORD	???
 0Ch	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	far pointer to data area
 10h	WORD	buffer for result
SeeAlso: #03424,#03426