There's a logo banner on OpenFirmware. This logo on my pegasos is a
lettre B on a blue cercle.
I would like to change it, but dont know if it's possible.

If yes, What is the image format to use?
How many colors can I use?

thanks.

AFAIK that's not (yet?) supported.

I think its very doable. I am not sure about this, but I think I read
somewhere that you can even make animations and play little tunes upon
startup, or pretty much what you like within the boundaries of the
Forth interpreter in the firmware. I could be wrong though.

That would be funny.. :)

Hi,i already tried it, but without success.

My script was:

create logarray d# 512 allot endof
logarray d# 256 0 do i over i + c! loop drop endof
logarray d# 256 " oem-logo" $setenv endof
setenv oem-logo? true endof
banner endof

The Sun OpenFirmware documentation says that custom logos are supported, but the implementation used on Pegasos doesn't support this (yet?).
My script failed with a message that the system variable oem-logo doesn't exist.