[syslinux] online updates

[Lee Thalblum]

Hi. I'm looking for ideas or suggestions for field updates for an embedded system running linux with syslinux as the bootloader. The requirements are to be able to upload an image online (probably a private network using sftp) while the device is running, do some error checking on the new image and then reboot the device and run the new version. I'll be running off a CF card. The image is likely to be over 1G, and I only have 512M of RAM, which means I'll have to load the image into flash and run it from flash. I'm assuming I'll set a bit somewhere in upper flash space to tell which image to boot from.

I know syslinux will allow booting multiple OSs. Is there any way I can configure things to do what I'm trying to do? Or come close? Thanks.

Lee