[eunet.micro.acorn] Archimedes Minix?

gpvos@cs.vu.nl (Gerben 'P' Vos) (03/21/91)

I know of someone who is willing to port Minix to the Acorn Archimedes, but
he isn't sure whether there has already been some effort to do that.
I'd like to know about everyone who has tried it.

Or, if there already is an Archimedes Minix, why haven't i heard of it?

-                                       Gerben
--
--- Gerben Vos <>< - Aconet: BIGBEN!Gerben Vos - Internet: gpvos@cs.vu.nl

mvdvalk@cs.vu.nl (Valk v/d Martijn) (03/21/91)

I can recall a analogous request/discussion way back in 1988 by someone in
England (Koelmans). Anyway, it never came to a definite port, as far as I know.
BTW Gerben, could you please give us the name of that person?

Martijn van der Valk

<mvdvalk@cs.vu.nl>
Yep, student at the
other university in
Amsterdam (VU that is)


Real Men don't wear .sigs!

gpvos@cs.vu.nl (Gerben 'P' Vos) (03/22/91)

mvdvalk@cs.vu.nl (Valk v/d Martijn) writes:
>BTW Gerben, could you please give us the name of that person?

Jan Vermeulen, known to Aconet callers and *Asterisk* readers.

><mvdvalk@cs.vu.nl>
>Yep, student at the
>other university in
>Amsterdam (VU that is)

The VU is not the "other" university, it is THE university, right?

>Real Men don't wear .sigs!
Real Men aren't afraid to wear a .sig!

-                                       Gerben
--
--- Gerben Vos <>< - Aconet: BIGBEN!Gerben Vos - Internet: gpvos@cs.vu.nl

mvdvalk@cs.vu.nl (Valk v/d Martijn) (03/22/91)

gpvos@cs.vu.nl (Gerben 'P' Vos) writes:

>Jan Vermeulen, known to Aconet callers and *Asterisk* readers.

	Well, does Jan Vermeulen have an email address?

>The VU is not the "other" university, it is THE university, right?

	Tang1 ran2, ke3 bu shi4 ma!

gpvos@cs.vu.nl (Gerben 'P' Vos) (03/22/91)

mvdvalk@cs.vu.nl (Valk v/d Martijn) writes:
>	Well, does Jan Vermeulen have an email address?

No. But if you're interested in contacting him, i'll have a try over the BBS.
Mail me with your address, and i'll pass it to him.

-                                       Gerben
--
--- Gerben Vos <>< - Aconet: BIGBEN!Gerben Vos - Internet: gpvos@cs.vu.nl

eesrajm@cc.brunel.ac.uk (Andrew J Michael) (03/24/91)

In article <9396@star.cs.vu.nl>, gpvos@cs.vu.nl (Gerben 'P' Vos) writes:
> I know of someone who is willing to port Minix to the Acorn Archimedes, but
> he isn't sure whether there has already been some effort to do that.
> I'd like to know about everyone who has tried it.
> 
> Or, if there already is an Archimedes Minix, why haven't i heard of it?
> 
> -                                       Gerben
> --
> --- Gerben Vos <>< - Aconet: BIGBEN!Gerben Vos - Internet: gpvos@cs.vu.nl

This is one of those 'Holy Grail' type projects.  I tackled it a couple of
years ago for my part-time MSc project.  Unfortunately it took me most of
the time to get a working ACK C compiler for the ARM, so I didn't finish it.

There are two main problems to consider:

(a).  The compiler.  Albert Koelmans and I got a working compiler in the end
but it is very slow - about 900 dhrystones per second.   Compare this to the
4000 or so from the Norcroft compiler.  Unfortunately it is impossible to
use the existing RISCOS version of the Norcroft compiler.  (This is my
standard aptitude test for people who have expressed interest in porting
MINIX to the Archimedes; if you think that can use the existing compiler, then
you might as well not bother to go any further).

However, there are now some other possibilities.  Those with a RISCiX machine
are in a far better position.  I have also heard that a backend is now
available for gcc.   I was in the position of trying to use an unproven
compiler on unproved kernel code.

(b).  Hardware.  Although there are some books about the ARM hardware, what 
you really need is some application sheets, and there weren't any last time
I looked.   My original port was designed to use RS232 rather than the screen
and keyboard, because I couldn't find out enough about the keyboard and VIDC.
The other difficulty was the MMU, which *has* to be right, or you will never
get the machine to boot.

I gave up because of lack of time, but Albert Koelmans is still, I think
trying to use it as a student project.  You can try him for more details
(he might shoot me for saying so) - Albert.Koelmans@newcastle.ac.uk

Regards
Andy Michael


-- 
Andy Michael                                     "You might think that.  I
85 Hawthorne Crescent                             couldn't possibly comment."
West Drayton					    - `House of Cards'
Middlesex            email: eesrajm@brunel.ac.uk                             
UB7 9PA           or Andrew.Michael@brunel.ac.uk