INT 2A U - NetSoft DOS-NET v1.20+ - INSTALLATION CHECK                          
	AX = 4147h ('AG')
	DX = 0000h
Return: DX = 4147h if installed
	    DS:SI -> configuration data (see #02554)
Program: DOS-NET is a shareware networking package by Albert Graham
Note:	this call is supported by CLIENT.COM, SERVER.COM, ROUTER.COM, and
	  NETDOS.COM
SeeAlso: INT 65/DX=4147h,INT 65/DX=4741h


Format of DOS-NET v1.20 configuration data area:
Offset	Size	Description	(Table 02554)
 00h	BYTE	???
 01h	BYTE	interrupt number used by DOS-NET APIs
 02h	WORD	function number to place in AX for above interrupt
 04h	BYTE	minor version as two BCD(Binary Coded Decimal) A method of data storage where two decimal digits are stored in each byte, one in the upper four bits and the other in the lower four bits.  Since only the values 0 through 9 are used in each half of a byte, BCD values can be read as decimal numbers on a hexadecimal display of memory or a file. digits (e.g. 20h for v1.20)
 05h	BYTE	major version number (01h for v1.20)
 06h  2 BYTEs	???
 08h	WORD	??? (used by ARCNET.COM)
		bit 15: ??? (set by MACTEST.COM)
 0Ah	WORD	??? (used by NDIS(Network Driver Interface Specification) A hardware-independent network interface developed by Microsoft and 3com.  See also Packet Driver, TCP/IP..COM and ODI(Open Data-link Interface) A hardware-independent network interface developed by Novell, Inc.  See also NDIS, Packet Driver..COM)
 0Ch 22 BYTEs	???
 24h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	-> ??? function (set by PROTECT.COM)
 28h 12 BYTEs	???
 34h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	-> ??? function (set by FASTVIEW.COM)
 38h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	-> ??? function (set by FASTVIEW.COM)
 58h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	-> ??? (offsets 04h and 1Ah from value are used by NETFILES)
	???
 7Ch	WORD	???
 7Eh	WORD	??? (may be high half of a DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address. at 7Ch)
	???
 A8h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	-> ??? (used by SM.COM)
	???
114h	WORD	???
116h	WORD	??? (may be high half of a DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address. at 114h)
	???
1BDh	BYTE	??? flags
		bit 0: ???
		bit 6: ???
	???
1E1h	BYTE	???
	???
208h	WORD	??? (used by SM.COM, MACTEST)
282h	WORD	???
284h  2 BYTEs	???
286h	WORD	??? flags
		bit 0: ???
	???
31Eh	WORD	???
320h	WORD	??? (used by NDIS(Network Driver Interface Specification) A hardware-independent network interface developed by Microsoft and 3com.  See also Packet Driver, TCP/IP..COM and ODI(Open Data-link Interface) A hardware-independent network interface developed by Novell, Inc.  See also NDIS, Packet Driver..COM)
322h  8 BYTEs	???
32Ah	WORD	??? (used by NDIS(Network Driver Interface Specification) A hardware-independent network interface developed by Microsoft and 3com.  See also Packet Driver, TCP/IP..COM and ODI(Open Data-link Interface) A hardware-independent network interface developed by Novell, Inc.  See also NDIS, Packet Driver..COM)
	???
33Eh  4 BYTEs	??? (used by ODI(Open Data-link Interface) A hardware-independent network interface developed by Novell, Inc.  See also NDIS, Packet Driver..COM)
342h  N BYTEs	??? (used by NDIS(Network Driver Interface Specification) A hardware-independent network interface developed by Microsoft and 3com.  See also Packet Driver, TCP/IP..COM)
	???
3CFh	BYTE	??? flags
		bit 2: ???
3D2h	BYTE	installed-component flags
		bit 0: PROTECT installed
		bit 1: NETCACHE installed
		bit 3: SM.COM installed
		bit 7: NETDEBUG installed
3D3h	BYTE	installed-component flags
		bit 0: NETFILES installed
		bit 6: FASTVIEW installed
	???
3FFh	BYTE	??? (used by NDIS(Network Driver Interface Specification) A hardware-independent network interface developed by Microsoft and 3com.  See also Packet Driver, TCP/IP..COM)
400h	BYTE	???
401h	BYTE	??? (used by SM.COM)
402h	BYTE	??? (used by SM.COM)
	???
448h	BYTE	???
449h	BYTE	??? (used by MACTEST)
44Ah	BYTE	??? (used by PROTECT)
44Bh	BYTE	???
44Ch	BYTE	???
44Dh	BYTE	??? (used by SM.COM)
44Eh	BYTE	??? (used by SM.COM, MACTEST)
	???