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echo: os2prog
to: Eddy Thilleman
from: David Noon
date: 1998-12-26 16:29:02
subject: Timeslice release

In a message dated 12-23-98, Eddy Thilleman said to Ivan Todoroski about
"Timeslice release"

Hi Eddy & Ivan,

IT> It uses the undocumented DOS INT 28 when run under OS/2.

ET>I assume you mean INT 28 = INT 28 hex?

ET>Why do you think that DOS INT 28 hex is undocumented? It's 
ET>documented in Ralf Brown's interrupt list, and other 
ET>documentations I guess.

This INT is actually documented by Microsplat themselves. See "MS-DOS
Programmer's Reference 6.0", Microsoft Press, ISBN 1-55615-546-8, pp 145-146
under the section heading "MS-DOS Idle Handler".

Better yet, this is the one timeslice release interrupt that has worked
consistently inside a VDM under Warp 4. The perenniel favourite, INT
2FH/AX=1680H, which is nominally the DPMI timeslice release, has been a
nightmare under Warp 4.

Regards

Dave

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