I feel like fooling around with making a toy OS designed for ARM. I've downloaded the Linux arm-test (http://wiki.qemu.org/Testing) which runs a barebones Linux environment complete with a framebuffer (penguin graphic shown on console) in QEMU.
I've messed around with making relatively basic x86 OSes before so now I want to try on ARM.
Obviously I need a way to get information onto the screen. I haven't started yet but my question is how would I access the graphics device/video memory? I know in x86 you're given access to video memory at a certain address to do what you like, but I've probably spent an hour looking for a similar approach for QEMU ARM and can't find anything.