1) v7 indicates code built for armv7 architecture, otherwise it is for armv6
2) you can delete dtb's for other boards, but you are loosing SD card portability; dtb's are small, you win nothing removing them
3) Extensions are in /tce/optional (in piCore...
2) you can delete dtb's for other boards, but you are loosing SD card portability; dtb's are small, you win nothing removing them
3) Extensions are in /tce/optional (in piCore...