After searching in the net, i found the way to make u-boot and how to install it. But i encounter some problem
After copy u-boot.img, MLO, and boot.scr in the first partition of my SDCard. The site said that it the u-boot should be booting my uimage. But in reality my Pandaboard is not responding (as if there are no SDCard inserted)
I follow the instructions from elinux.org (http://elinux.org/Panda_How_to_MLO_%26_u-boot) and other source that give same instructions like elinux.org
Can you tell me what i'm doing wrong ?
Thank you for the answer, I am really appreciate any help and answer

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Regards,
Erry Pradana Darajati | Student of Computer Engineering
Politeknik Elektronika Negeri Surabaya / EEPIS, Indonesia