Thread View: comp.windows.ms.programmer
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Started by Arindam Banerji
Wed, 15 Apr 1992 10:46
Re: Dos drivers under Windows
Author: Arindam Banerji
Date: Wed, 15 Apr 1992 10:46
Date: Wed, 15 Apr 1992 10:46
19 lines
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1089 bytes
The solution depends upon the direction of the communication. The Windows app can use the DPMI interface to talk to the DOS device driver ( enhanced or standard modes ) . The simplest way the DOS device driver can communicate with the windows app is to set up a shared region in low memory ( not necessarily low, if enhanced mode is being used ), and let a Windows DLL poll it from time-to-time. This is not as bad as it seems, since in enhanced mode the Windows vitual machine is non-premptable, although the DOS boxes are. Arindam Banerji (axb@irishvm.pcl.nd.edu) (axb@cse.nd.edu) (219)-239-5273
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