I'm going to try a couple of things in DOS 5.0 and DOS 6.20, I'll be back.
On Wed, Jun 8, 2016 at 2:52 PM, Eric Auer <e.a...@jpberlin.de> wrote:
>
> Hi Bret,
>
> the problem of using but not reserving memory for the kernel in FreeDOS
> sounds vaguely similar to the problem of HMA usage in DOS in general:
>
> DOS installs trampoline handlers outside HMA which make sure that the
> HMA is actually enabled before DOS calls code there. Maybe a similar
> approach could be used for the unallocated FreeDOS memory?
>
> It could check if the not-reserved temp data is still valid and if not,
> avoid attempts to use it. Of course it would be better if FreeDOS could
> behave and use MCB for that temp data in the first place, but I do not
> know the ins and outs of why it does not or maybe can not do that now.
>
> Also, this could be relevant for the way in which FreeCOM misbehaves by
> using without allocating memory, if I understand the other mails well.
>
> It should probably check if the data left in RAM is still valid and if
> not, reload the (message string) data from disk or from XMS swap RAM?
>
> Regards, Eric
>
>
>
>
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