Submitted by ScaraOS is a 32-bit, multiboot-compliant, monolithic OS kernel. It has the beginnings of a paged VM system and VFS. It supports PCI, DMA, AT floppies (read only), EXT2, and can do all the low-level stuff expected of an OS kernel (program the PIC, handle interrupts, control the timer, etc.). It was written primarily to learn OS fundamentals. It boots using any multiboot bootloader, and it has been tested with grub on qemu and KVM. Bootable floppy images are available.
it’s actually pretty neat, especially if your interested in OS design fundamentals.
It would be really fun to just take a week off of work and just study the guts of all of these cool OS-es. Like a OScation.
I’m not one to detract from scara’s work, but I don’t think that page has been updated since 2003 (unless the cvs id is wrong??)
It doesn’t look too inactive. Maybe the ID is really wrong. The copyright says 2010 and on github there is also activity:
http://github.com/giannitedesco/scaraOS
So it is. Mea culpa.
I wonder if any of the os is written in assembly
There is necessarily at least a part written in assembly. Consider hardware-specific features like paging : you need CPU-specific instructions to access them.
There is necessarily at least a part written in assembly. Consider hardware-specific features like paging : you need CPU-specific instructions to access them.
Correct. It’s however surprisingly little assembly you need. You can just write very small, specific functions and call them from some higher-level code and you end up with only a few hundred lines of actual assembly code. I too used plain C in my kernel to do all the rest, just a few scattered assembler functions when something couldn’t be done in any other way.
Dr. Who’s most famous enemies… (no, not the cybermen, either – The other one’s from the planet… Skaro).