Meaning of MODE "Illegal Device Name - COMx" Message (73725)
The information in this article applies to:
• Microsoft MS-DOS operating system 4.01
• Microsoft MS-DOS operating system 5.0
• Microsoft MS-DOS operating system 5.0a
This article was previously published under Q73725
SUMMARY
If the I/O port address for a COM port is set to 0 (zero) in the table
of COM port addresses located at address 0000:0400 to 0000:0407, then
the MODE COMx command returns the following error message:
Illegal device name - COMx
I/O port addresses are initialized at start up by the BIOS and can be
changed through software.
A value of 0 for a COM port address typically indicates a lack of BIOS
support.
Modification Type: |
Major |
Last Reviewed: |
10/13/2003 |
Keywords: |
KB73725 |
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