boot boot :: moonboot ?

[maccatalan]

Hello.

I'm back with some new stupid questions for the highly wisy you are.

Today I am dealing with booting. I read an interesting article about Mac Booting on www.kernelthread.com and this made me think a bit ... what should I do to get a booting code ?
If I compile with gcc a c-code program with stdio.h asking for some input (what implies screen and keyboard), will this program be bootable and if yes will it recognize screen and keyboard. I suppose not but actually is it ?
If it is not, is there any simple way to achieve this goal ? (my goal is to simply get keyboard and screen. No disks, no filesystems, ... nothing. Just a little interactive program written in C).

Thx for you help
I have been searching for tutorials (there are some for x86 but I found none for PPC).
Pierre.