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- DOCUMENT:Q103406 04-NOV-1993 [W_NT]
- TITLE :Full Screen MS-DOS Application Runs Slowly
- PRODUCT :Windows NT
- PROD/VER:3.10
- OPER/SYS:WINDOWS
- KEYWORDS:BUGLIST
-
- ----------------------------------------------------------------------
- The information in this article applies to:
-
- - Microsoft Windows NT operating system, version 3.1
- - Microsoft Windows NT Advanced Server, version 3.1
- ----------------------------------------------------------------------
-
-
- SYMPTOMS
- ========
-
- At times, your graphical, MS-DOS - based application runs very slowly
- in full-screen mode. You may notice this behavior is triggered by
- switching the application between an icon and full screen state. Also,
- if you press a key, the application speeds up for a short time.
-
- CAUSE
- =====
-
- The Windows NT virtual MS-DOS machine (VDM) enabled idle time
- detection while the application was in full-screen mode. Because
- Windows NT does not trap video activity while an MS-DOS - based
- application is running in full-screen mode, it assumes the application
- is idle and reduces its execution priority. The reason the application
- speeds up when you press a key is that Windows NT detects keystrokes
- at all times; when the activity is noted, the status of the
- application is changed from idle to active.
-
- RESOLUTION
- ==========
-
- If you experience this behavior, use PIF Editor to create a program
- information file (PIF) for your application. In the Advanced Options
- dialog box, disable Detect Idle Time under Multitasking Options.
-
- Additional reference words: 3.10
- KBCategory:
- KBSubCategory: 16AP
-
- =============================================================================
-
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-
- Copyright Microsoft Corporation 1993.