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echo: os2dos
to: DAVID NOON
from: JAMES MCKENZIE
date: 1997-03-11 18:51:00
subject: Dpmi Limits

Hello David!
10 Mar 97 21:43, David Noon wrote to James Mckenzie:
 DN> This shouldn't crash the system, just GPF the VDM session. However,
 DN> that's a funny pointer that is limited to 32MB. It would be a 25-bit
 DN> one. [Think about that.]
Sorry to say, but it will crash OS/2.  And I know what you are saying about 
the pointer.  Weird does not begin to describe it.  Actually, it can address 
32MB -1 byte.
 DN>> I haven't had to push any of my DOS/4GW proggies beyond 32MB yet,
 DN>> so I'd like to know what might happen.
 JM>> You should not have to either.  I think that DOS/4GW limits
 JM>> the size of any addressable file...
 DN> Addressable file? What's that?
The file that it can access.
 DN> The limit should be determined by the DPMI server, not the client. In
 DN> a VDM the server should be OS/2's VMM, not DOS/4GW.
You are correct according to the way things SHOULD work, but remember, 
DOS/4GW was written to run under pure DOS, not an OS/2 VDM.
James
... It's called Windows cuz it's a 'pane'
--- GoldED/2 2.50+
(1:309/63)
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