I have compiled fresh u-boot with zImage support
Source https://github.com/linux-sunxi/u-boot-sunxi
Installation included
compressed tar.xz https://drive.google.com/file/d/0B8SCwUX_aqrrRm1hRzFxYVE4ejg/view?usp=sharing
Get working linux-armv7 kernel without video support
script=cubieboard.bin
loaduImage=fatload mmc 0 0x48000000 uImage && true && bootm 0x48000000 - 0x44000000
loadzImage=fatload mmc 0 0x48000000 zImage && true && bootz 0x48000000 - 0x44000000
autoboot=fatload mmc 0 0x44000000 sun4i-a10-cubieboard.dtb && run setargs && run loaduImage || run loadzImage
extraargs=rw hdmi.audio=EDID:0 disp.screen0_output_mode=EDID:1280x1024p60 rootwait
