Format of PC/TCP configuration data:
Offset	Size	Description	)
 00h 12 BYTEs	IPCUST.SYS device driver header (see #01646)
 12h	BYTE	???
 13h	BYTE	???
 14h	WORD	???
 16h	BYTE	bit flags
		bit 0: send BS rather than DEL for BackSpace key
		bit 1: wrap long lines
 17h	BYTE	???
 18h 64 BYTEs	ASCIZ hostname
 58h 64 BYTEs	ASCIZ domain name
		(fully qualified domain name is hostname.domain-name)
 98h 16 BYTEs	ASCIZ username
 A8h 64 BYTEs	ASCIZ full name
 E8h 64 BYTEs	ASCIZ office address
128h 32 BYTEs	ASCIZ phone number
148h	WORD	offset from GMT in minutes
14Ah  4 BYTEs	ASCIZ timezone name
14Eh	WORD	number of time servers
150h  ? DWORDs	(big-endian) IP addresses for time servers
	???
164h	WORD	number of old-style name servers
166h  3 DWORDs	(big-endian) IP addresses for name servers
172h	WORD	number of domain name servers
174h  3 DWORDs	(big-endian) IP addresses for domain name servers
180h	DWORD	(big-endian) IP address of default gateway
184h	DWORD	(big-endian) IP address of log server
188h	DWORD	(big-endian) IP address of cookie server
18Ch	DWORD	(big-endian) IP address of lpr server
190h	DWORD	(big-endian) IP address of imagen print server
194h 54 BYTEs	???
1E8h	WORD	TCP default window size in bytes
1EAh	WORD	TCP low window size
1ECh 64 BYTEs	ASCIZ host tabel filename
22Ch  2 BYTEs	???
22Eh 80 BYTEs	ASCIZ mail relay host name
27Eh	BYTE	???
27Fh	BYTE	??? bit flags
280h 44 BYTEs	???
2ACh	WORD	???
2AEh 202 BYTEs	???