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- DOCUMENT:Q93218 08-JUL-1993 [W_NT]
- TITLE :INF: MS-DOS/Win16 Serial Communication Applications on NT
- PRODUCT :Windows NT
- PROD/VER:3.10
- OPER/SYS:WINDOWS
- KEYWORDS:
-
- ----------------------------------------------------------------------
- The information in this article applies to:
-
- - Microsoft Windows NT operating system version 3.1
- ----------------------------------------------------------------------
-
- Summary:
-
- When running MS-DOS or Windows version 3.1 serial communications
- applications that directly access serial port hardware, you may
- enhance performance of these applications by using software
- handshaking (xon/xoff) instead of hardware handshaking (cts/rts).
-
- Because hardware must be virtualized under NT, checking the cts/rts
- signals directly will incur an unavoidable performance degradation.
- Using xon/xoff handshaking avoids this problem since xon/xoff
- handshaking does not require accessing the serial port hardware
- directly.
-
- Note that this does not apply to Windows version 3.x or Win32
- applications that correctly use the Comm APIs to do communications.
-
- Additional reference words: 3.10 handshaking cts rts
- KBCategory:
- KBSubcategory:
-
- =============================================================================
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- Copyright Microsoft Corporation 1993.