Microsoft KB Archive/84780

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COMxProtocol Setting Not Explained in SYSINI.WRI File

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Q84780

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The information in this article applies to:


 * Microsoft Windows versions 3.1, 3.11

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SUMMARY
Page 93 of the &quot;Getting Started with Microsoft Windows&quot; manual for Windows 3.1 incorrectly states that the COMxProtocol setting for the SYSTEM.INI file is explained in the SYSINI.WRI file.

There is no reference to this entry in the SYSINI.WRI file that is provided with Windows 3.1. However, this entry is included in the SYSINI.WRI file that is provided in the Microsoft Windows Resource Kit for Windows 3.1.

MORE INFORMATION
The following explanation is from the SYSINI.WRI file that is provided with the Microsoft Windows Resource Kit:

  COM1Protocol= COM2Protocol= COM3Protocol= COM4Protocol=

Default: (Default is no entry, which is the same as any             entry other than XOFF)

Purpose: Specifies whether Windows in 386 enhanced mode should stop simulating characters into a virtual machine after the virtual machine sends an XOFF character. Set the value for a port to XOFF if a            communications application using that port is             losing characters while doing text transfers at             high baud rates. Windows will resume simulating characters when the virtual machine sends another character after the XOFF character. Leave this setting disabled if the application is doing binary data transfers; enabling this switch might suspend binary transmissions. Windows will not check for XOFF characters if this setting is blank or set to anything other than XOFF. If the application continues to lose characters after this setting is properly set, try increasing the corresponding COMxBuffer value. NOTE: COMxProtocol does not apply to Windows-based applications that call the Comm application program interface (API) functions. Windows-based applications can set their protocol using SetCommState. However, COMxProtocol may work for Windows-based applications that use terminate-and- stay-resident (TSR) programs for communication instead of the Comm API functions (for example, WinFax).

To modify this setting, use Notepad to edit the SYSTEM.INI file.

Additional query words: 3.10 3.11 wrk 3rdparty doc err

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Technology : kbWin3xSearch kbWin310 kbWin311