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<TITLE>Int 21/AH=FCh
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Int 21/AH=FCh - DoubleDOS - GET VIRTUAL SCREEN ADDRESS -
AH = FCh
Return: ES = segment of virtual screen
Desc: Determine the address of the virtual screen to which the program
should write instead of the actual video memory, so that the
multitasked programs do not interfere with each other's output.
Notes: screen address can change if task-switching is on!
identical to AH=ECh
SeeAlso: AH=EChDoubleDOS,INT FCDoubleDOS
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<h2>Int 21/AH=FCh
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<h3><font color=#C00040>DoubleDOS - GET VIRTUAL SCREEN ADDRESS</font></h3>
<PRE>
AH = FCh<br>
<p><b>Return:</b><br>ES = segment of virtual screen
</PRE>
<p><b>Desc:</b>
Determine the address of the virtual screen to which the program
should write instead of the actual video memory, so that the
multitasked programs do not interfere with each other's output.
<p><b>Notes:</b>
Screen address can change if task-switching is on!.
Identical to AH=ECh
<p><b>See Also:</b>
<a href="rb-3621.htm" tppabs="http://www.ctyme.com/intr/rb-3621.htm">AH=ECh"DoubleDOS"</a> - <a href="rb-8733.htm" tppabs="http://www.ctyme.com/intr/rb-8733.htm">INT FC"DoubleDOS"</a>
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<b>Category: <a href="cat-011.htm" tppabs="http://www.ctyme.com/intr/cat-011.htm">
DOS-Based Task Switchers/Multitaskers</a>
- <a href="int-21.htm" tppabs="http://www.ctyme.com/intr/int-21.htm">
Int 21h</a>
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D</a>
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