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The Implementation of the ULIX Literate Operating System

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A diary documenting the implementation of ULIX-i386

Welcome to the ULIX blog.

Ulix (Literate Unix) is a Unix-like operating system developed at University of Erlangen-Nürnberg. I use D. E. Knuth's concept of Literate Programming for the implementation and documentation. The goal was a fully working system which can be used in operating system courses to show students how OS concepts (such as paging and scheduling) can be implemented. Literate programs are very accessible because they can be read like a book; the order of presentation is not enforced by program logic or compiler restrictions, but instead is guided by the implementer's creative process.

Ulix is written in C and assembler for the Intel architecture. The literate programming part is handled by noweb.

On this page I document my progress with the implementation.


Navigation: 2015 | 2014 | 2013 | 2012 | 2011


Ulix has address spaces (05.04.2012)


Another step on the way to proper process management: Ulix now has address spaces which can be switched on. So there is "process-private" memory (however: no process yet).
To do: more work on address spaces (there are some bugs in there); integrate address spaces + usermode switch + process table (not defined yet). For starters, only cooperative scheduling.

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