Added a Serial Console Port to the Netgear DG834GT
In the lower left corner of the router with it facing you is the pads for the serial port, named J503 next to it are also the JTAG header named J201 (I have not tested if it actually works...)
The serial port is a RS422 port so it requires a Maxim MAX232 to get the 3,3v levels of the RS422 port to the 12v levels a PC's RS232 port uses... I wont bother you with the details on this since this is the same type of IC you need for interfacing with for example a Linksys WRT54G(S) and ZyXEL Prestige 645 so enough info about this is already posted on the web ;-)
Here is the Netgear booting, with 115200, No Parity, 1 Stopbit 8 Paritybits and Software flow control:
©CFE öersiïn ±.0.3·-5®11 fïr BCM96³48 (³2bét,SP¬BE)
Buéld Dáteº Fri Sep 17 ±5:59º48 CST ²004 (roït@Ruî-P´)
©ïpyright (C) ²00°,200±,2002,2°03 Bòoaäcom Ãorðoratéon.
Énitiálizing Árena®
Énitiálizing Äevicås.
©bcm6348ånet: inét_emácîternál_ïpen
CPU tùpe 0ø29±07: ²56MHz, Âus: ±28ÍHz, Òef: 32MÈz
©Toôal måmory usåd by CFÅ: 0ø8040100° - 0ø80µ1C91° (11614¸8)
©BSS Areá: 0ø8041¹2D° - 0ø8041A91° (56¹6)
Locál Heap:
©Stacë Area: 0x8051Á910 0ø8051Ã910 (81¹2)
Ôexô (coäe) segmånt: 0x¸04°1000 - 0x¸04±8624 (9µ780)
Booô aòea (ðhysical©:
°x005±D000 - °x0055D0°0
©åloãatioî Factorº I:0°000000 D:0°00°000
Bïard ÉP áddreós : 1¹2.168.1®1:ffæffæ00
Host IÐ addòesó
º 1¹2.16¸.1.100
Gaôewáy IP address :
©Defaõlt host run æile namå : vmliîux
Dåfault hïst fìasè filå name : bãm9¶3xx_æs_kerneì
Âooô deláy (0-9 óeconäs) : 1
Boaòd Éd Naíe º 96348G×-
10
Ðsi séze in KÂ : ±6
©Etèerneô PHY Tyðe : Inôernaì:54:e7:¹2
Íemorù séze iî MB : ±6
©**ª Press ány kåy ôo stïp auto òun (± såcondó) ***
Áuto òun secoîd ãount downº 1ˆ°
©Closing netwïrk®46c000°, Åntry Addråssº 0x8°01046c
©Total Flash size: 4096K with 71 sectors
Scratch pad is not used for this flash part.
96348GW-10 prom init
CPU revision is: 00029107
Primary instruction cache 16kb, linesize 16 bytes (2 ways)
Primary data cache 8kb, linesize 16 bytes (2 ways)
Linux version 2.4.17 (root@Run-P4) (gcc version 3.1) #356 Mon May 16 13:00:33 CS
T 2005
Determined physical RAM map:
memory: 00fa0000 @ 00000000 (usable)
On node 0 totalpages: 4000
zone(0): 4000 pages.
zone(1): 0 pages.
zone(2): 0 pages.
Kernel command line: root=/dev/mtdblock0 ro
bcm_console_setup
Calibrating delay loop... 255.59 BogoMIPS
Memory: 13960k/16000k available (1357k kernel code, 2040k reserved, 92k data, 56
k init, 0k highmem)
Dentry-cache hash table entries: 2048 (order: 2, 16384 bytes)
Inode-cache hash table entries: 1024 (order: 1, 8192 bytes)
Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
Buffer-cache hash table entries: 1024 (order: 0, 4096 bytes)
Page-cache hash table entries: 4096 (order: 2, 16384 bytes)
Checking for 'wait' instruction... unavailable.
POSIX conformance testing by UNIFIX
PCI: Fixing up bus 0
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Initializing RT netlink socket
Starting kswapd
devfs: v1.7 (20011216) Richard Gooch (rgooch@atnf.csiro.au)
devfs: boot_options: 0x1
brcmboard: brcm_board_init entry
Module bcm63xx_cons.c v1.1 May 16 2005 13:01:04
block: 64 slots per queue, batch=16
PPP generic driver version 2.4.1
blaadd: blaa_detect entry
adsl: adsl_init entry
Broadcom BCM6348A2 Ethernet Network Device v0.1 May 16 2005 13:04:32 External PH
Y Reverse MII (SPI Device 1)
eth0: MAC Address: 00:0F:B5:54:E7:92
Amd/Fujitsu Extended Query Table v1.1 at 0x0040
number of CFI chips: 1
Creating 4 MTD partitions on "Physically mapped flash":
0x00010100-0x00298100 : "fs"
mtd: partition "fs" doesn't start on an erase block boundary -- force read-only
0x00010000-0x003f0000 : "tag+fs+kernel"
0x00000000-0x00010000 : "bootloader"
0x003f0000-0x00400000 : "nvram"
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP, IGMP
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP: Hash tables configured (established 512 bind 1024)
Linux IP multicast router 0.06 plus PIM-SM
ipt_random match loaded
netfilter PSD loaded - (c) astaro AG
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
NET4: Ethernet Bridge 008 for NET4.0
VFS: Mounted root (cramfs filesystem) readonly.
Mounted devfs on /dev
Freeing unused kernel memory: 56k freed
serial console detected. Disabling virtual terminals.
console=/dev/console
init started: BusyBox v0.61.pre (2005.05.16-03:07+0000) multi-call binary
Starting pid 13, console /dev/console: '/usr/etc/rcS'
Algorithmics/MIPS FPU Emulator v1.5
Using /lib/modules/push_button.o
Using /lib/modules/2.4.17/kernel/net/ipv4/netfilter/ipt_REJECT.o
ap_name=wlan action=stop
bridge br0 doesn't exist!
bridge br0 doesn't exist!
SIOCGIFFLAGS: No such device
SIOCGIFFLAGS: No such device
rmmod: ath_ap_mips: No such file or directory
BcmAdsl_Initialize=0x800AB328, g_pFnNotifyCallback=0x80186980
AdslCoreHwReset: AdslOemDataAddr = 0xA0FF73B0
device eth0 entered promiscuous mode
eth0 Link UP.
ap_name=(null) action=start
br0: port 1(eth0) entering listening state
br0: port 1(eth0) entering learning state
br0: port 1(eth0) entering forwarding state
br0: topology change detected, propagating
killall: syslogd: no process killed
killall: upnpd: no process killed
SIOCADDRT: File exists
Waiting for enter to start '/bin/sh' (pid 108, terminal /dev/console)
Please press Enter to activate this console. UPnP Initialized
Intialized UPnP
with fullurl=http://192.168.0.1:49152/gateway.xml
ipaddress=192.168.0.1 port=49152
web_dir_path=/usr/upnp/
desc_doc_url=http://192.168.0.1:49152
Specifying the webserver root directory -- /usr/upnp/
Registering the RootDevice
RootDevice Registered
Initializing State Table
fullurl http://192.168.0.1:49152/gateway.xml
Advertisements Sent
Starting pid 108, console /dev/console: '/bin/sh'
BusyBox v0.61.pre (2005.05.16-03:07+0000) Built-in shell (ash)
Enter 'help' for a list of built-in commands.
# cat /proc/cpuinfo
system type : 96348GW-10
processor : 0
cpu model : BCM6348 V0.7
BogoMIPS : 255.59
wait instruction : no
microsecond timers : yes
tlb_entries : 32
extra interrupt vector : no
hardware watchpoint : no
VCED exceptions : not available
VCEI exceptions : not available
# free
total used free shared buffers
Mem: 14016 6080 7936 0 940
Swap: 0 0 0
Total: 14016 6080 7936
# ls
bin etc proc tmp var www.deu www.fre
dev lib sbin usr www www.eng www.ita
#I have no idea why the output is garbaged when loading the bootloader, perhaps the serial port has not been setup at that stage of the boot process...
Pin 1 = GND
Pin 2 = TX
Pin 3 = VCC
Pin 4 = RX
The reason I added the serial port was because I was hoping the Netgear would have an OS similar to Zywall or IOS where it is easy to specify and test different connection settings... Unfortunately (for me) it is running Linux so I wont be able to look further into why this ADSL modem will not work together with Ericsson DSLAM equipment... I only get sync, no data is exchanged with the DSLAM thus I get no IP Address... Funny thing is that a DG834G works fine with said DSLAM...
Or perhaps someone knows of a newer "driver" for the Broadcom BCM6348 chip in this router? Would be worth trying....
