Re: GEMDOS from VBL

[stehlik@cas3.zlin.vutbr.cz (Petr Stehlik)]

On Sat, 20 Jun 1998 22:56:54 +0200, Michael Schwingen wrote:

MS>> PS>How hard would be to let MiNT start as the first program in AUTO folder?
MS>> PS>We would have to adapt some device drivers and HSMODEM - what else?
MS>>
MS>> This question is very important, because otherwise the new memory
MS>> management of MiNT will work on non-FastRAM machines only :-/
MS>
MS>Are you talking about systems where alternate RAM is installed using an
MS>auto-folder program (like MagnumST/Magnum F030)?

yes

MS>I can think about some other cases where the PMMU is already initialized and
MS>in use even before the auto folder is executed. The MiNT memory management
MS>code will have to cope with that, as well as with different pagesizes - or
MS>it will have to re-initialize the PMMU, while retaining the old mappings,
MS>which might be difficult.

yes, that's exactly what I tried to point out. Imagine this: there is
the TOS and several resident drivers that are already running in FastRAM
when MiNT starts. MiNT is going to re-initialize PMMU - is it able to
read and retain the old mapping? It would have to find out where the
resident programs and TOS reside and this area of FastRAM should be not
altered/paged out.

Is this possible? Wouldn't it be easier to make MiNT start as the first
program in AUTO folder? I don't know, I can't program PMMU.

Petr
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