10 Jul
2014
10 Jul
'14
2:32 a.m.
On 10 July 2014 01:39, John Wilson <wilson at dbit.com> wrote:
Never looked into that. I was always sorry there wasn't any attempt in
DOS itself (apart from some overseas version of V4 maybe?) to do multi-tasking,
since it would have been easy enough to do at least what RT-11 does. I was
always careful to retry my GETBLOCK calls endlessly, just in case in the
future (or even the present, thanks to pop-up TSRs), the largest available
block turns out to already not be available afterwards, if some other thread
is nibbling away at memory while I'm trying to get some.
Did you say you used DR-DOS 8? DR-DOS had multitasking from DR-DOS 7.0
and ViewMax could act as a GUI for it. Just full-screen,
virtual-console switching type, but it worked well. IIRC though you do
need to use DR's 386 memory manager, not the Microsoft ones that you
get if you install any version of Windows later than 3.0.
--
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