Slim Bootloader failed to boot
I am a newbee in the customization of the bios and fw. Started relatively easy task to use SlimBootloader on UP2 Squared board. I've made a following steps:
1. Confirmed I can flash UPA1AM50.bin with SF100 and boot board with customized Yocto build or Ubuntu 18.04
2. I've followed the steps from https://slimbootloader.github.io/supported-hardware/up2.html and used UPA1AM50.bin, made stitching as instructed
3. The board reboot in the black screen, no access to bios or anything
Can anybody help what I am doing wrong ?