where can i find linux image/src apart from one on the Atmel website?

Hello all

I am making a RS232 - datalogger for my MasterThesis in the university. My environment is BDI2000 debugger GNU toolchain AT91RM9200

The work is simply to take input signals from the USART port and send it to the SD card. Can anyone please answer the following quesitons ?

1. I have u-boot running on my board. Is there a way to achieve my goal by just using the u-boot. I am using FAT system on the SD card.
2. Is using Linux image a good idea. If yes . where can I find the linux Image for my arm board ?
3. how can i debug u-boot using the BDI2000 ?
4. I used Windows Hyperterminal to download the basic Atmel examples and it runs fine.. how can i use minicom to do it ? i configured it for

8N1 and xmodem /dev/ttyS0 but i dont see anyting which i could see throh hyperterminal in windows

1. With the Atmel MCI sample code, i can recognise my SD card but cannot save anyting .of course due to unavilaiblity of the FAT drivers. How can i solve it ?

Regards

Tutu