Just for fun I wrote a simple multitasking OS for the AVR architecture. It supports SD cards with the FAT16 file system and has an ELF loader and relocator. It supports a few common system calls.
Here is a quick shot of it running on an Atmega328p
I'm not releasing the code right now because it's messy and there are a couple of major bugs.
Nice! Looking forward to look through the code. You should definitly publish this on Github 
how much Flash space does this hog?
hansibull:
Nice! Looking forward to look through the code. You should definitly publish this on Github
I should have it up pretty soon. I want to add some comments first (there are few)
how much Flash space does this hog?
~16K for the Kernel and bootloader. + Whatever applications you load from the SD card
Somehow, when I think of smeezekitty, I think attiny13, and now we have jiggy-ninja accusing his software of being a memory-hog!! It just shows flexibility!!
Where was an accusation? I just see a question.
"hog" is pretty pejorative. "does this use" would have been a question.
I insult out of envy.