Microsoft KB Archive/78451

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INFO: Detecting EGA.SYS

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Q78451

3.00 3.10 WINDOWS kbprg

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The information in this article applies to:


 * Microsoft Windows Software Development Kit (SDK) 3.1

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SUMMARY
EGA.sys is a driver that facilitates the use of the shadow registers in EGA and more advanced video cards. Through the use of the mouse driver's Interrogate Driver function, it is possible to determine if EGA.sys is installed.

The interface to the Interrogate Driver function is as follows:

  AH = FAh BX = 0 INT 10h The return values are:

  AX = Restored BX = 0 if the mouse driver or EGA.SYS is not installed

< 2 if EGA.SYS was installed with the mouse driver >= 2 if EGA.SYS was installed For more information, see chapter 10 of the &quot;Microsoft Mouse Programmer's Reference,&quot; second edition (Microsoft Press).

Additional query words: 3.00 3.10

Keywords : kb16bitonly _IK kbSDKWin16

Issue type : kbinfo

Technology : kbAudDeveloper kbWin3xSearch kbSDKSearch kbWinSDKSearch kbWinSDK310