Posted: Fri Feb 06, 2009 17:35 Post subject: Indeed
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.
Posted: Thu Feb 12, 2009 12:41 Post subject: Flash Chip worked!!
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.
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.
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
Posted: Wed Apr 04, 2012 12:45 Post subject: hardware mod
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).
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.