[no subject]

[sm001pe@unidui.uni-duisburg.de (Pereira Martins)]

Dear Eric Smith & dear Atari MiNT mailing list readers !


as MiNT refuses to work  with VRAM. Perhaps we should develop an VMM concept 
or adapt MiNT & VRAM & Outside ! In order to do so there would be needed an PMMU
acess interface (or an VMM much to change ?!!).

With best regards, Filipe

E-Mail: Filipe.Martins@unidui.uni-duisburg.de

The following articles are related to VMM, MiNT & VRAM and I collected them
to have all opinions in one file. I hope this is OK so :-)

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Message 139/175 from Elias M}rtensson                    Aug 14 '94 at 9:27 pm

Return-Path: <mint-request@terminator.rs.itd.umich.edu>
Date: Sun, 14 Aug 1994 21:27:12 +0200 (MET DST)
Subject: Some thoughts on MiNT
To: mint@atari.archive.umich.edu
Mime-Version: 1.0
Status: RO

I have some thoughts and questions on MiNT and its problems...

Are there any plans to replace the losing memory manager in MiNT with a 
decent one? I mean, why implementing kluges like the shared text stuff 
that requres -mbaserel? More and more atari systems have a 68030. Why not 
use it? Doing so wold solve a lot of problems, including: the absence of 
a virtual memory manager, fragmented memory, kludgy shared text (the only 
thing that would be needed is a prgflag that is a gurantee that the text 
segment is never modified).

I have the impression that MiNT users have learned to live with these
problems instead of attempting to do something about it. Please don't 
accuse me of complaning without doing anyting. I don't know enough about 
memory managers to be able to do it. Is anybody working on this?

Another really nice thing would be shared libraries. Most MiNT 
configurations have only 4 megs of memory (including my own). If I 
install everything I want to run (MinixFS, MiNT-NET, vcons, MiNTOS, Bash, 
etc...) I have only about 700KB left! That's not even enough for Emacs!

Is anybody working on a port of X-Windows for MiNT? This is one of the 
things I would really love to see on my atari. I've thought about trying 
the new Linux port but I'd rather use MiNT.

What's your comments on this?

-- 
Elias M}rtenson                         !  No joke here.
elias@proxxi.uf.se                      !  Sorry for the inconvenience.
C-programmerare och GNU-fanatiker       !

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Message 173/175 from Thierry Bousch                      Aug 17 '94 at 1:50 pm

Return-Path: <bousch@topo.matups.fr>
Subject: Re: Some thoughts on MiNT - Virtual Memor Manager (VMM) needed !!!
To: sm001pe@unidui.uni-duisburg.de (Pereira Martins)
Date: Wed, 17 Aug 1994 13:50:09 +0200 (MET DST)
Cc: mint@atari.archive.umich.edu (Liste MiNT)
X-Mailer: ELM [version 2.4 PL23]
Content-Length: 824       
Status: RO

Pereira Martins writes:

>  I can't make VMM driver too :-((( Perhaps somebody looks at linux and tries
>  to adapt it to MiNT & MTOS ???

Memory management is not an add-on; adding VM would require to rewrite
MiNT from scratch. (And don't tell me about Vram and Outside; since VM
is not part of the kernel, you will certainly have problems very soon.
Imagine, for instance, that an interrupt handler has been swapped out
and an interrupt occurs. Or, that the f_lock semaphore is set while a
major page fault occurs: immediate deadlock.)
[..]
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Dear Sam Tramiel !

I'm a great fan of Atari ! But a VMM (Virtual meory manager) would be needed for MiNT !
Because VRAM & Outside CAN'T BE USED ANYMORE & Atari's MiNT IS THE ONLY operating
system without !!! working VMM !!! 
  On Apple's System 7.1 there is VMM included !! & on Windows 3.x & 4.x & on
OS/2, too !!!
So it's time to ACT NOW !

What could be done ? Well those who have written VRAM (Alexander Herzlinger and other
persons -> just contact OVERSCAN GbR !) & OUTSIDE (Maxon), Eric R. Smith (Mr. MiNT :-),
Robert Koekamp (robert@koekamp.and.nl -> Linux on Atari with VMM of course !),
Bjoern Brauel (Maus Net/Linux on Atari) & Roman Hodek (Maus/Net/Linux on Atari)

With best regards, Filipe :-)

Filipe.Martins@unidui.uni-duisburg.de

P.S.: A VMM conference on CompuServe & the MiNT Mailing list would be useful !