itsy bitsy Unix

[Wai-Sun Chia]

On Wed, 16 Mar 2005 22:00:12 -0800, Zane H. Healy <healyzh at aracnet.com> wrote:
> At 9:32 PM -0800 3/16/05, Cameron Kaiser wrote:
> >Does anyone know a true (not a homebrew hack) multitasking environment that
> >will run in 16K or less, preferably with available source?
> >

uCOS-II. (http://www.ucos-ii.com)
Real-time, pre-emptive multitasking, embedded.
Comes with source-code, have to buy the book to be legal.
Heck it even has a TCP/IP module.

Quote (page 72) of the said book:
"A minimal kernel for an 8-bit CPU that provides only scheduling,
context switching, semaphore management, delays and timeouts should
require about 1 to 3kB or code space."

So theoretically it'd be possible to port this to a 16kW PDP.