Proposal for the 8K IP64 ROM:
1) Implement IPv4 (maybe ipv6 someday.. hard to handle those addresses on 8 bits tho)
2) Use device 7 as interface.
3) No TCP option headers are parsed and will be skipped over.

Memory map (Preliminary) - All values are little endian except for IP address or otherwise specified.

Address	Size	Description
------- ----	-----------
=== Configuration ===
$02A8	4		IP address (0.1.2.3)
$02AC	4		Netmask	(0.1.2.3)
$02B0	4		Gateway (0.1.2.3)
$02B4	4		DNS (0.1.2.3)
$02B8	4		TFTP address (0.1.2.3)
$02BC	2		TFTP port
$02BE	2		MTU (>1500 not allowed), and flags
				15: Get config from DHCP
				14: Autoboot from TFTP (Will attempt to load "BOOT" from TFTP and run it, should be BASIC prog)
				13-11: Reserved (0)
				10-0: MTU/MRU
$02C0	6		MAC address
=== Pointers ===
$02C8	2		Pointer to packet buffer SEND (Default: $E000, under kernel, 1536 bytes)
$02CA	2		Pointer to packet buffer RECV (Default: $E600, under kernel, 1536 bytes)
$02CC	2		Pointer to trigger byte to swap cartridge out (Will store $00 to location)
$02CE	2		Pointer to trigger byte to swap cartridge in  (Will store $FF to location)
=== Original vector pointers ===
$02D0   2		HW Interrupt
$02D2   2		NMI
$02D4   2		Kernel (OPEN)
$02D6   2		Kernel (CLOSE)
$02D8   2		Kernel (CHKIN)
$02DA   2		Kernel (CHKOUT)
$02DC   2		Kernel (CLRCHN)
$02DE   2		Kernel (CHRIN)
$02E0   2		Kernel (CHROUT)
$02E2   2		Kernel (STOP)
$02E4   2		Kernel (GETIN)
$02E6   2		Kernel (CLALL)
$02E8   2		Kernel (LOAD)
$02EA   2		Kernel (SAVE)
$02EC	2		Pointer to hostname (Default $03E8, null terminated)
$02EE	9		Small routine to call SHUTDOWN then swap out ROM (SYS 750)
				JSR SHUTDOWN
				LDA #$00
				STA ($02CC)
				RTS
$02F7   9		Small routine to swap cart in and call WARMSTART (SYS 759)
				LDA #$FF
				STA ($02CE)
				JMP WARMSTART
				RTS				
$03E8			Hostname (Default location, 16 chars with null terminator
=== Beginning of ROM ===
$8000 - 5		'CBM80'
$8005	2		COLDSTART vector
$8007	2		WARMSTART vector
$8009	15		Filename to autostart from TFTP  
=== Copied to configuration area on boot, default config can be burned into ROM ===
$8018	4		IP address (0.1.2.3)
$801C	4		Netmask	(0.1.2.3)
$8020	4		Gateway (0.1.2.3)
$8024	4		DNS (0.1.2.3)
$8028	4		TFTP address (0.1.2.3)
$802C	2		TFTP port
$802E	2		Flags
				15: Get config from DHCP
				14: Autoboot from TFTP
				13-0: Reserved (0)
$8030	2		MTU (>1500 not allowed)
$8032	6		MAC address
$8040	16		File name (null terminated) to boot from TFTP	
$8050	16		Hostname (Null terminated)
$8060	16		Username (For SLIP/PPP)	
$8070	16		Password (For SLIP/PPP)
$8080	128		Reserved
$8100 * 1792	Hardware driver (Responsible for receiving and sending data)
$8100	2		Vector (L2_RECVBYTE)
$8102	2		Vector (L2_SENDBYTE)
$8104	2		Vector (L2_RECVPKT)
$8106	2		Vector (L2_SENDPKT)
$8108	2		Vector (L2_INIT)
$810A	2		Vector (L2_RESET)
$810C	2		Vector (L2_COPYPKT)
$810E	2		Vector (L2_IRQ)
$8110 - $87FF	Hardware driver code
$8800 - $8FFF	Kernal interface
$8800   2		Vector (KIP_OPEN)
$8802   2		Vector (KIP_CLOSE)
$8804   2		Vector (KIP_CHKIN)
$8806   2		Vector (KIP_CHKOUT)
$8808   2		Vector (KIP_CLRCHN)
$880A   2		Vector (KIP_CHRIN)
$880C   2		Vector (KIP_CHROUT)
$880E   2		Vector (KIP_STOP)
$8810   2		Vector (KIP_GETIN)
$8812   2		Vector (KIP_CLALL)
$8814   2		Vector (KIP_LOAD)
$8816   2		Vector (KIP_SAVE)
$8818	2		Vector (KIP_ISDEV7)
$881A	2		Vector (KIP_STR2IPINF)
$881C	2		Vector (KIP_SECHAN2FLAGS)
$881E	2		Vector (KIP_ISDEV7)
$8820	2		Vector (KIP_SECADDR2FLAGS)
$8822	2		Vector (KIP_ERRCHAN)
$8824	2		Vector (KIP_IRQ)
$8830 - $8FFF	Kernal interface code
$
$9C00 - $9FFF	TCP/IP application/config code
$9000	2		Vector (IP_INIT_CONFIG)
$9002	2		Vector (IP_SHUTDOWN)
$9004	2		Vector (IP_DHCP_REQUEST)
$9006	2		Vector (IP_DHCP_RENEW)
$9008	2		Vector (IP_DHCP_RELEASE)
$900A	2		Vector (IP_TFTP_LISTEN)
$900C	2		Vector (IP_TFTP_RECV)
$900E	2		Vector (IP_TFTP_SEND)


======================================
$E000	1536	Default packet buffer 1
$E600	1536	Default packet buffer 2
$EC00	1024	Reserved for driver use
$F000	16*16	Connection descriptors
Connection descriptor format (32 bytes)
0-3		Remote IP address (Bind/Destination)
4-5		Port Number
6-7		Flags:
		15-14: (tcp)
			00: Connection closed
			01: SYN sent
			10: ACK received (from SYN)
			11: Connection open
		15-14: (udp)
			0x: Port closed
			1x: Port open
			x0: Port is UDP
			x1: Port is raw IP
		13: 0: Port is TCP
			1: Port is UDP or IP
		12:	1=Port is listening (TCP)
			1=Port is enabled (UDP)
			0=Port is not listening or enabled
		11: 1=
		
Kernel trampoline at $02D0		

KTRMP	
		BCC KOUT
		LDA $01
		STA $02FF
		ORA #$01
		STA $01
		JMP END
END