PBDOS and XMS?

[Jim Barber]

Hi folks,

Not having used PBDOS in years, I can't remember if it
handles data moves to and from XMS and a data segment?

I'm working on a spec for a system that currently
uses DOS on an embedded Pentium. My mission is to
add video capture. We have the option of adding
another (protected mode OS) processor, or trying
to handle large video and processing buffers (>64k)
in XMS chunks on the existing processor. Assuming CPU
cycles aren't a problem, any ideas?

Thanks,
Jim Barber


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[Sebastian Groeneveld]

PowerBasic 3.5 supports arrays that are stored in EMS (so-called VIRTUAL arrays)...

If you want to allocate XMS blocks and write to and read from them, you can
try my little free XMS unit (for PB3.5, on request maybe also for PB3.2),
downloadable from: http://dracuul.tripod.com/pb-units/

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Sebastian Groeneveld
mailto:[email protected]om[email protected]</A>

[Lance Edmonds]

Also check out http://www.powerbasic.com/files/pub/pbdos/library/ and look for XMS22.ZIP



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Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>

[Jim Barber]

Sebastian and Lance,

Thanks! That's what I needed to know.
The recent ad for PBDOS brought it to mind as
a possible solution.

We probably -should- move the whole system over
to embedded Linux or NT, but that would require
writing drivers for the hardware, and a possible
increase in interrupt latency. Right now it's
written in QC, but I definitely remember writing
ISR's in PBDOS at one time. If the client will
entertain the idea, I'll set it up for a little
testing.

Regards,
Jim Barber


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