.png)
Change port
Lists or changes the COM port mappings to be compatible with MS-DOS applications.
Syntax
change port [{portx=porty|/d portx|/query}]
Parameters
portx = porty : Maps COM port x to porty.
/d portx : Deletes the mapping for COM port x.
/query : Displays the current port mappings.
/? : Displays help at the command prompt.
Remarks
-
Most MS-DOS applications support only COM1 through COM4 serial ports. The change port command maps a serial port to a different port number, allowing applications that do not support high-numbered COM ports to access the serial port. For example, to map COM12 to COM1 for use by an MS-DOS-based application, type change port com12=com1. Remapping works only for the current session and is not retained if you log off from a session and then log on again.
-
Use change port without any parameters to display the available COM ports and their current mappings.
Formatting legend
|
Format |
Meaning |
|---|---|
|
Italic |
Information that the user must supply |
|
Bold |
Elements that the user must type exactly as shown |
|
Ellipsis (...) |
Parameter that can be repeated several times in a command line |
|
Between brackets ([]) |
Optional items |
|
Between braces ({}); choices separated by pipe (|). Example: {even|odd} |
Set of choices from which the user must choose only one |
|
Courier font |
Code or program output |
