Hi Everyone,
  Earlier this year I started writing an operating system using D.
It uses a
microkernel design, and is targeted at x86 PCs. I had lots of great
plans for
the operating system, but I never got them even close to being
realized. At the
moment, I've stopped working on it with no plans to continue,
so I decided to
release what source code I had already made.

 It basically
has just 4 parts that are finished/working:
 1) An interface to be loaded by a
multiboot compatible boot loader
 2) A text driver
 3) A memory manager which
uses paging and can keep track of 4GB of memory.
(simple reservation system,
kmalloc, etc.)
 4) A tool for automatically creating a bochs hard drive image
after each
compile, which allows for very fast testing.

 Anyhow, if you're
interested, you can download it here:
http://members.shaw.ca/bradenm_k/misc/picos2004a.tar.gz

I don't claim to be a
great programmer, and this was my first operating system.
Nonetheless, I feel
it may be helpful to someone.

P.S. The last compiler I used for this was
either DMD 0.92 or 0.93 - perhaps
you might get some new compiler
errors/warning due to deprecated features.
Also, the Makefiles are all set up
for Linux. It would be a lot of work to get
this to compile on Windows.