WRT54GL Memory Mod (hardware mod)

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tav48
DD-WRT Novice


Joined: 06 Feb 2009
Posts: 10

PostPosted: Fri Feb 06, 2009 17:35    Post subject: Indeed Reply with quote
tcharron wrote:
Read my post from a few days ago regarding the 16M chip!
There are multiple sets of pads that are designed to accomodate various flash chips.
I think that if you place the chip one set of pads to the right, you'll have line 21.


Yes you are definitely correct - I did the same to a friends GL in the past and it worked flawlessly - with that method you bypass having to do any other unnecessary modifications.
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tav48
DD-WRT Novice


Joined: 06 Feb 2009
Posts: 10

PostPosted: Thu Feb 12, 2009 12:41    Post subject: Flash Chip worked!! Reply with quote
Alrite guys;
Today the flash chip arrived in the post.

I soldered it to the board and hooked up the JTAG cable. All I have to say is that it WORKS!
I got the Jtag debrick utility to detect the 4MB flash and managed to load the CFE to it without any dramas. Im now flashing in the mini firmware to the router - lets see how it goes.

I'll post pictures in a day or so when I find my charger for my camera.

Reposted this as a new topic;
http://www.dd-wrt.com/phpBB2/viewtopic.php?p=262051#262051
kapastratos
DD-WRT Novice


Joined: 04 Oct 2008
Posts: 33
Location: Romania

PostPosted: Wed Apr 15, 2009 6:27    Post subject: Reply with quote
CaScAdE wrote:


I soldered a single chip from a KVR400X64SC3A/256 to my wrt54gl and used
Code:
nvram set sdram_init=0x0113
nvram set sdram_ncdl=0x000


and got the full 64MB.



I am trying to do same thing but first I need to buy a KVR400X64SC3A/256, so I was looking to buy some memory and I found out this: http://www.valueram.com/datasheets/KVR400X64SC3A_256.pdf ... it seems that this is a 256MB (32MB * 8 chips).

Can you tell me where I can find a 64MB one?
danna
DD-WRT Novice


Joined: 17 Nov 2009
Posts: 1

PostPosted: Tue Nov 17, 2009 11:28    Post subject: Reply with quote
Thanks for making a guide. This is very useful.


Regards,
Danna
Ordinateur portable pas cher
Wolf Kodi
DD-WRT User


Joined: 13 Jun 2010
Posts: 68

PostPosted: Sat Jul 17, 2010 2:04    Post subject: Reply with quote
Where can I harvest a 16MB flash memory chip from? Computer motherboards? Which kind should I be looking for or do I have to order the chips?
pflatlyne
DD-WRT Novice


Joined: 08 Aug 2010
Posts: 2

PostPosted: Sun Aug 08, 2010 11:05    Post subject: Reply with quote
Wolf Kodi wrote:
Where can I harvest a 16MB flash memory chip from? Computer motherboards? Which kind should I be looking for or do I have to order the chips?


I did something similar with a WRT54G V5 a few years ago. I salvaged a 4meg flash and a 16mb ram chip from a flaky dlink router. It worked fine. At one point I even flashed a WRT54GS linksys image with speed booster and ran that for awhile. Im now back on OpenWRT. It flashed a DDWRT image just fine as well.
Vaako
DD-WRT User


Joined: 10 Jun 2009
Posts: 260

PostPosted: Wed Dec 29, 2010 22:01    Post subject: Reply with quote
Can someone post more information on the NAND Flash chip?
Where can we find them, all information is welcome!!!

_________________
Regards,
Vaako

1x Netgear R7000 Nighthawk DD-WRT DD-WRT v24-sp2 (02/04/14) std (SVN revision 23503)
1x Ubiquiti RouterStation Pro DD-WRT v24-sp2 (12/24/13) std (SVN revision 23204)
1x Asus RT-N16 SVN revision 20675 NEWD-2 K2.6
1x Linksys E4200 v24-sp2 (12/24/13) mega NEWD-2 K3.x (SVN revision 23204)
1x Buffalo WZR-HP-G300NH B0 B0 Gargoyle FW
1x Linksys WRT600N v1.1 (Bricked)
1x Linksys WRT54GL v1.1 (DD-WRT)
1x Linksys WRT54GS v2.2 (DD-WRT)
1x Linksys RVS4000 (stock fw)
3x D-Link DWL-7100AP (openWRT)
2x TP-Link TL-WA801ND (Bridge mode) 100mW TX-Power
Asus WL-520GU SVN 16403M NEWD-2 Eko std-nokaid
4x Fonera with Gargoyle FW
Vaako
DD-WRT User


Joined: 10 Jun 2009
Posts: 260

PostPosted: Mon Jan 03, 2011 19:31    Post subject: Reply with quote
Hi,

Just like you to know i have found this Intel Flash chip TE28F128 at eBay:

http://cgi.benl.ebay.be/TE28F128-Intel-StrataFlash-Memory-IC-/270636445264?pt=LH_DefaultDomain_0&hash=item3f03306e50

I'm gona order me one and try it out Very Happy

Peace!!!

_________________
Regards,
Vaako

1x Netgear R7000 Nighthawk DD-WRT DD-WRT v24-sp2 (02/04/14) std (SVN revision 23503)
1x Ubiquiti RouterStation Pro DD-WRT v24-sp2 (12/24/13) std (SVN revision 23204)
1x Asus RT-N16 SVN revision 20675 NEWD-2 K2.6
1x Linksys E4200 v24-sp2 (12/24/13) mega NEWD-2 K3.x (SVN revision 23204)
1x Buffalo WZR-HP-G300NH B0 B0 Gargoyle FW
1x Linksys WRT600N v1.1 (Bricked)
1x Linksys WRT54GL v1.1 (DD-WRT)
1x Linksys WRT54GS v2.2 (DD-WRT)
1x Linksys RVS4000 (stock fw)
3x D-Link DWL-7100AP (openWRT)
2x TP-Link TL-WA801ND (Bridge mode) 100mW TX-Power
Asus WL-520GU SVN 16403M NEWD-2 Eko std-nokaid
4x Fonera with Gargoyle FW
thenotwellman
DD-WRT User


Joined: 26 Dec 2010
Posts: 71
Location: nyc

PostPosted: Sat Jan 15, 2011 21:15    Post subject: Reply with quote
found this on eb*y

http://cgi.ebay.com/28F640J3A-Intel-StrataFlash-Memory-Parallel-64M-Bit-/180484902970?pt=LH_DefaultDomain_2&hash=item2a05bd103a

but it says its 56 pin TSOP. not sure but are most flash chips on linksys 54g routers 48 pin? or could this be a match?
sabot105mm
DD-WRT Novice


Joined: 11 Mar 2011
Posts: 5

PostPosted: Thu Mar 17, 2011 23:30    Post subject: Reply with quote
im having trouble finding a spec-sheet for this ram module, all i could find is whats below. i just want to know if this ram chip will work.
Manufacturer Part Number VS256MB400
Form Factor: 184-pin
Memory Size: 256 MB
Memory Speed: 400 MHz
Memory Standard: DDR400/PC3200
Memory Technology: DDR SDRAM
Module Configuration: 32M x 64
Number of Modules: 1 x 256 MB
Jackson0
DD-WRT Novice


Joined: 18 Feb 2012
Posts: 1

PostPosted: Sat Feb 18, 2012 18:23    Post subject: Reply with quote
Hello,

can somebody tell me how fast the flash has to be?

Can I use 120ns or 150ns Flashes?

Regards,
Jackson
rioachim
DD-WRT Novice


Joined: 04 Apr 2012
Posts: 8

PostPosted: Wed Apr 04, 2012 12:45    Post subject: hardware mod Reply with quote
yes, waking up the dead.

Ok, I can confirm 32MB memory chips:
Hynix HYDU561622DT-5 / Infineon HY250256160CE-5 work just fine in my WRT54GL (no sw modifications needed)

and 8MB flash chip:
Spansion S29JL064H (TopB/BotB) works after routing original Pin13 to left side Pin9.

Warning: do not take for granted that flash chips work on other pads than the original chip. The nearby TSOP48/TSOP56 pads have different configurations so before doing anything you should compare the pinout of the replacement Flash chip with the pinout of the original Flash chip (if it's identical +A21 line, don't try other pads).
rioachim
DD-WRT Novice


Joined: 04 Apr 2012
Posts: 8

PostPosted: Sat Apr 07, 2012 17:08    Post subject: Reply with quote
See photo below for my mods. Added USB mod with SMD resistors on USB socket (soldered to PCB) and SMD capacitors on LM7805 (nicely placed next to power socket)

(http://www.dd-wrt.com/phpBB2/viewtopic.php?t=64931)
Rechmp
DD-WRT Novice


Joined: 01 Sep 2011
Posts: 3

PostPosted: Thu May 17, 2012 21:28    Post subject: Reply with quote
hello guys.
i have a few chips from elixir 256mb (8 chips) memory. its 400mhz ddr ram.
sn of chips: N2DS25680BT-5T.
can you tell me please, is that chip fit for wrt54gl v1.1?
here is datasheet:
http://www.elixir-memory.com/products/file/elixir-256M-B-DDR400-R1.4-1003.pdf

thanks!
artemisgoldfish
DD-WRT Novice


Joined: 31 May 2010
Posts: 5

PostPosted: Sat Jun 02, 2012 4:03    Post subject: Reply with quote
Rechmp wrote:
hello guys.
i have a few chips from elixir 256mb (8 chips) memory. its 400mhz ddr ram.
sn of chips: N2DS25680BT-5T.
can you tell me please, is that chip fit for wrt54gl v1.1?
here is datasheet:
http://www.elixir-memory.com/products/file/elixir-256M-B-DDR400-R1.4-1003.pdf

thanks!


8 chips on a single-rank DIMM (typical in low-density unregistered memory) indicates that each DRAM chip should be 8-bits wide. Doesn't sound like a match, the WRT54GL wiki page says the router uses 16-bit wide DDR.
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