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echo: os2prog
to: Mike Bilow
from: Alan Clifford
date: 1996-06-01 17:38:14
subject: OS/2 Dos Backgrnd.

Hello Mike

 MB> It is a design decision, not a problem to be fixed.  DOS progams which
 MB> write directly to the hardware in any form cannot be allowed to run
 MB> in background.  OS/2 will allow such programs to run in foreground,
 MB> but will then preserve and restore the state of the VGA hardware when
 MB> switching to or from the task.

 MB> DOS programs which go through BIOS or the VESA video interface can be
 MB> allowed by OS/2 to run in background or in a window, provided that
 MB> the particular video hardware driver is compatible with such
 MB> operation.

I have a text mode Dos program that updates a time display using a pointer
into video memory.  It is running in a window as I write this.


Alan

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