OpenWrt Forum Archive

Topic: Enable 32MB with ping exploit on WRT54Gv2 router?

The content of this topic has been archived on 19 Apr 2018. There are no obvious gaps in this topic, but there may still be some posts missing at the end.

Hi.

I'm wondering if it's possible to use the ping exploit/bug to enable the full 32MB ram my router appears to have?
I'm running Linksys firmware at the moment, and don't have plans to switch right now.

Can I do it by replacing the boot_wait trick:
;cp${IFS}*/*/nvram${IFS}/tmp/n
;*/n${IFS}set${IFS}boot_wait=on
;*/n${IFS}commit
;*/n${IFS}show>tmp/ping.log

with:
;cp${IFS}*/*/nvram${IFS}/tmp/n
;*/n${IFS}set${IFS}sdram_init=0x0008
;*/n${IFS}set${IFS}sdram_ncdl=0x0000
;*/n${IFS}commit
;*/n${IFS}show>tmp/ping.log

?

I'm sure my router has 32MB. I used a flashlight to find the partnumber on the ramchips, which is is42s16800a-7t, and they're 8Mx16 chips <==> 16MB each ==> 32MB in total.

/Istvan

Those of you who have ISSI chips and are interested, I'm quite sure it's the 8 (8th character) in the partnumber string that tells it's a 8M chip. The strings for v1 to v2 in http://www.linksysinfo.org/modules.php? … id=6#table says they are 4M chips <==> 8MB each <==> 16MB in total.
The v2.2 in the same table, has a 8Mx16 chip <==> 16MB chip, but it only has 1 chip ==> 16MB in total (error in the table claiming 32MB). For v2.2 and v3, you need to have a 16Mx16 chip to make it a 32MB router.

But I think the only lucky ones are those with "newer" v2 routers.
I guess just before Linksys was switching to single ramchips (16MB) in the v2.2 design, and ran out of 8MB ramchips, they used 16MB chips on the v2 routers.

The commands shown are correct. Assuming you can fit those in the ping field and that the ping bug hasn't been fixed in the firmware you're running, it should work.

Just as a reminder, we don't provide any support for the stock firmware on this forum; you'll have to resolve any issues regarding the ping bug yourself.

Hi.


I'm sure my router has 32MB. I used a flashlight to find the partnumber on the ramchips, which is is42s16800a-7t, and they're 8Mx16 chips <==> 16MB each ==> 32MB in total.

I have some very fine pictures of my wrt54g V2 (french market),
reference is : IS4216800A-7T ; so it could be a 32Mb of RAM ?

I would prefere to have a flash of 32Mo ;-)

http://wrt54g.free.fr/revival/wrt54g-v2/imgp0763.jpg

Hi.


I'm sure my router has 32MB. I used a flashlight to find the partnumber on the ramchips, which is is42s16800a-7t, and they're 8Mx16 chips <==> 16MB each ==> 32MB in total.

I have some very fine pictures of my wrt54g V2 (french market),
reference is : IS4216800A-7T ; so it could be a 32Mb of RAM ?

I would prefere to have a flash of 32Mo ;-)

http://wrt54g.free.fr/revival/wrt54g-v2/imgp0763.jpg


If that's a picture of your router, with 2 is42s16800a-7t ramchips, then yes, it _should_ be possible to enable 32MB on it. I have the same chips on mine...

After a tip on another forum, I loaded Batbox onto the router and changed the nvram values and rebooted. And now I have 32MB enabled on my router.

To clarify what I meant about the flashlight... I used it to lit up the inside of the router through the holes on the top, so I didn't have to open it and break the warrenty sticker. On my v2, the ramchips were where the holes begin in front-right side.


Memory information

total: used: free: shared: buffers: cached:
Mem: 31453184 12652544 18800640 0 2080768 6393856
Swap: 0 0 0
MemTotal: 30716 kB
MemFree: 18360 kB
MemShared: 0 kB
Buffers: 2032 kB
Cached: 6244 kB
SwapCached: 0 kB
Active: 4100 kB
Inactive: 5716 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 30716 kB
LowFree: 18360 kB
SwapTotal: 0 kB
SwapFree: 0 kB

Hi.


I'm sure my router has 32MB. I used a flashlight to find the partnumber on the ramchips, which is is42s16800a-7t, and they're 8Mx16 chips <==> 16MB each ==> 32MB in total.

I have some very fine pictures of my wrt54g V2 (french market),
reference is : IS4216800A-7T ; so it could be a 32Mb of RAM ?

I would prefere to have a flash of 32Mo ;-)

http://wrt54g.free.fr/revival/wrt54g-v2/imgp0763.jpg

i guess you mean IS42S16800A-7T and not IS4216800A-7T ? (when i look to your picture smile

I have the same in my box (french too smile, the only difference is the second number : L6K0025001M

i didnt try to make mine 32mo.

i have seen two times on the net that these chips are 8Mx16 (on a french forum http://forum.hardware.fr/hardwarefr/Win … 1109-1.htm and on a datasheet website : http://www.digchip.com/datasheets/parts … _is08.php)

Take a led flashlights cheap led flashlights wholesale Headlights and look down at the system board inside the WAN Ethernet jack.  In tiny print, they are probably even labeled TX RX GRD as they are on the 310N.  A continuity tester will reveal them to be identical connections, you can even follow the traces.

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