Rockbox SD BOOT

koniu multi boot works like this(FW = the /.rockbox firmware ):
[Bootloader] looks for FW to load (it starts at the highest drive index)
In the root of each drive /rockbox_main.<playername> can specify a directory to look for the FW
if it finds a .rockbox directory [based on the data in the redirect file] then it generates a crc
and fills in a special data struct with teh crc and what volume the FW was found on
[end of boot loader] FW was loaded to memory and booted either the FW on internal or the sd card

[FIRMWARE] -> we have a valid redirect file and fimware
FW does its init -- Looks for the special memory left by bootloader
FW Checks to see if the CRC it generates matches the CRC generated by the bootloader
CRC OK - FW makes note of where it is running from and sets path accordingly directs writes/reads there
CRC BAD - As far as FW is concerned it resides on the internal memory directs writes/reads there