COM Port Settings in Control Panel vs. Command Prompt
This article was previously published under Q112841
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The COM port settings in the Ports option of Control Panel have no effecton COM port settings used in a command prompt window.
MODE.COM queries the port directly. Default settings are the following:
Status for Device COM1: ----------------------- Baud: 1200 Parity: Even Data Bits: 7 Stop Bits: 1 Timeout: OFF XON/XOFF: OFF CTS handshaking: OFF DSR handshaking: OFF DSR sensitivity: OFF DTR circuit: ON RTS circuit: ON
Applications reset the mode of the COM port(s). If, for example, you startTerminal and reset COM1 to 14400 baud, 7 data bits, odd parity, then exitTerminal, the new settings remain in effect until the computer is shutdown. Upon rebooting, the default settings are once again in effect. TheControl Panel settings, on the other hand, affect the registry. Anapplication that is appropriately written can query the registry for thesevalues and use the Control Panel settings. The default settings in thePorts option of Control Panel are:
Settings for COM1: ------------------- Baud Rate: 9600 Data Bits: 8 Parity: None Stop Bits: 1 Flow Control: None
prodnt 3.1 3.5 4.0
Article ID: 112841 - Last Review: 12/04/2015 10:04:06 - Revision: 2.2
Microsoft Windows 2000 Server, Microsoft Windows 2000 Advanced Server, Microsoft Windows 2000 Professional Edition, Microsoft Windows NT Advanced Server 3.1, Microsoft Windows NT Workstation 3.1, Microsoft Windows NT Advanced Server 3.1, Microsoft Windows NT Workstation 3.5, Microsoft Windows NT Workstation 3.51, Microsoft Windows NT Workstation 4.0 Developer Edition, Microsoft Windows NT Server 3.5, Microsoft Windows NT Server 3.51, Microsoft Windows NT Server 4.0 Standard Edition
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