21st February 17:17
If you want to add a full screen logo to your BIOS, you will have to write
your own BIOS or you will have to decompile your old BIOS, change it and
compile it again. When your customized BIOS is ready, you need to program it
on the chip with special software or hardware (it depends on the kind of
BIOS chip you have). This only works if there's enough free space available
on the chip. If there is not enough space, you will have to remove some of
its functionality. Changing an existing BIOS or making your own BIOS really
isn't easy to do. Even for an advanced programmers it takes a lot of time.
If your BIOS already has a full screen logo, that's displayed at startup, it
might be a lot easier to change it. You don't have to decompile and
recompile the whole BIOS then probably, but you only have to change some
data that's stored with the BIOS.
Everything depends on the kind of BIOS you have and on the kind of chip it's
stored on. If you're lucky and your BIOS already displays a picture at
startup and it isn't stored in a difficult format, it might be worth