Did COSMOS initially not use Mono? I seem to remember a toy OS kernel named either Cosmo or COSMOS on OSdever that was written in x86 ASM and C and had a shell, multitasking, paging memory manager, and a loader with RING0 and RING3 processes. This would have been ~2005-2006 ish. Was this it?
I've been watching Cosmos development since that time period and I think this is the same one you are thinking of. I swear ten years ago the TODO list was the same for this project.
