@3VILC
Maybe to simplify things with drivers first you could just remove the graphics card and use the internal on-board sm502 graphics for setup first which should work, then add the graphics card once you have a working system after installing Enhancer for the drivers.
Are you using the right AmigaOS version for you machine? Other versions for sam440 or similiar might read kickstart files but won't boot, only the sam460 version has the right kernel and drivers. If you need a working AmigaOS system to add drivers or format usb drive or similar you could try booting AmigaOS on QEMU, it should work with -machine sam460ex but AmigaOS should boot even with the old U-Boot version.
Since the old U-Boot version has problems reading USB drives maybe you'd need to write the updater to an iso or a hard disk partition that it can read.
There's some documentation in the U-Boot update that tells you how to find out the right version:
Quote:
Another way to check the base clock is from the System Information U-Boot menu (CLK freq)
After that, you need to check which brand is the flash chip mounted on the board, it could be ATMEL or SST, this will needed later when running the updater.
But not sure if the CLK freq is shown in the older U-Boot but probably can also be found from the info printed to serial which is something like:
Quote:
U-Boot 2010.06.05 (Jan 23 2019 - 15:07:17)
CPU: AMCC PowerPC 460EX Rev. B at 1150 MHz (PLB=230 OPB=115 EBC=115)
and maybe it could be guessed somehow from the frequencies reported in this line. Or you could try bdinfo command in U-Boot which prints some freqs too.