system.img : The main Android OS partition holding apps, libraries, and system configurations. Phase 2: Modifying the System Partition
: To extract the update.img file into separate partition images. rockchip rk3026 442 firmware repack
Ultimate Guide to Repacking Rockchip RK3026 Android 4.4.2 Firmware system
Some older Rockchip tools require a specific CRC check at the end of the image file to be valid for flashing. Rockchip 3229,3328, 3288, 3399 - USB Recovery Android Tool 3399 - USB Recovery Android Tool