I have finally managed to update my U-Boot just the other week.
I have followed the OS4 installation guide found on the website.
Below is section 3:
Insert the AmigaOS4.0 Developer pre-release CD in your CDROM drive. At the UBoot "]" prompt type:
ide reset
setenv boot1 cdrom
boota
You will notice the AmigaOS4.0 kernel modules will begin loading from the Developer pre-release CD.
It should look like this:-
Once the kernel (kickstart) has loaded, your screen will go blank and your monitor may go onto standby.
The CD drive is still being accessed at this point, after about one minute you will be presented with a welcome message on a White background.
It shows that the kickstart is loading, but when it comes to section 4, my screen goes blank, then comes back on with what looks like the workbench screen but it all fuzzy and difficult to make out - I should have the Welcom to OS4 requester but don't.
HELP!!! :-?