The default target for a10Core is the Allwinner A10 Marsboard 1GB.
If your device does not boot from the default a10Core image then read on.

While it is not too dificult to get your device's script.bin, it may be more difficult to 
extract the bootloader.

The bootloader for Allwinner consists of two parts, sunxi-spl.bin and u-boot.bin

The directories contained herein contain the compiled bootloaders for supported Allwinner 
hardware. It is in the u-boot.bin which determines the amount of memory seen by the
device.

To use:
After creating and setup of SDCARD, see README.1st, perform the following:

Be sure that your SDCARD is not mounted.

dd if=sunxi-spl.bin of=/dev/sdX bs=1024 seek=8
dd if=u-boot.bin of=/dev/sdX bs=1024 seek32 

Where sdX is your unmounted SDCARD.