Edmund GRIMLEY EVANS <edmundo@rano.demon.co.uk> writes:

I've been trying to find out about existing implementations of L4. Perhaps people could correct or add to what I have discovered:

* The original L4 by Jochen Liedtke. Written in assebler. For i486 and i586. NOT FREE and therefore utterly useless :-)

* L4/MIPS from Australia. Written in assembler? GNU.

* L4/Alpha from Dresden and Australia. Written in assembler? Not yet released but probably GNU?

* Fiasco from Dresden. Written in C++, and designed for portabilty rather than efficiency, but only runs on i486 and i586 at present. GNU.

Fiasco hasn't really been designed for portability, even though it might serve as a model for future implementations (if someone would clean it up a bit ;). The reason it has been implemented in a high-level language is that this improves its maintainability.

* A version of L4 for x86 from Dresden written in C. I saw this mentioned in the list archive. Is it really separate from Fiasco?

No. There is no such beast.

* L4/ARM in assembler. Unfinished? I saw this in the archive, too.

If this list could be corrected and completed, could it be put on the L4 website, with links, as it must be what a lot of casual readers are interested in knowing?

Yes, that's right. The L4 web site at <URL:http://os.inf.tu-dresden.de/L4/> needs a major overhaul. Thanks for your suggestion. Michael -- hohmuth@innocent.com, hohmuth@sax.de http://www.sax.de/~hohmuth/