Hi all,
I'm working on some firmware with everything I need compiled in. I ended with quite a big firmware - 4.75MiB. To build it I had to edit target/utils/src/trx.c source file (changed TRX_MAX_LEN to something close to 5MiB). I have GS devices with 8MiBs of FLASH memory thus the firmware should fit in.

The question is - where (what address) is located NVRAM part of the flash memory? Is there any possibility that I'll rewrite it with this firmware? And even if I would, would it brick my WRT?

Thanks in advance
Tosuja

The limit for flashing your router via TFTP is 3 MB.
You can install your big image with "mtd".
And mtd will only write or erase the partition you say. It will not erase your nvram.

I know about TFTP limit.
I was just curious about position of NVRAM in FLASH because I have found some error message in trx.c source code saying something like "Firmware too big, there is a danger of writing over NVRAM". I suspect that NVRAM part is last 32kB from FLASH and in this case everything is OK. I'll give it a try....