* Gin ginlin@nexcom.com.tw [050222 10:07]:
Don't know if anyone has a good tool package in mind that I can use to develop an Embedded Linux. We want a linux that is just enough to run the flash_rom program+usb support and we hope it would be small enough so we can fit it into a Bios chip. It's all for the convenience of updating Bios in the future. As you image, we are closed to support Linuxbios officially in our products.
If it's just about reading a file from usb and writing it to flash, you might want to have a look at filo. It should be easy to integrate the functionality of flash_rom into it, so you don't need a full blown linux system in flash. Otherwise it is very much dependent on your flash size whether you can fit Linux in there or not. 512k _might_ be enough if you really squeeze, but unlikely.