Windows 3.1 Upgrade: .OS2 Ports Do Not Become .DOS Ports

 Last reviewed: November 21, 1994
Article ID: Q83484
The information in this article applies to:
  • Microsoft Windows operating system versions 3.1, 3.11

SUMMARY

When you upgrade from Windows version 3.0 to the Microsoft Windows operating system version 3.1, the port selection of LPTx.OS2 (where x is the port number) may not change. If an LPT port with the .OS2 extension is present in the [ports] section of your WIN.INI file when you upgrade, this port extension of .OS2 does not change to .DOS.

MORE INFORMATION

Windows 3.0 installs printer ports LPT1.OS2 and LPT2.OS2. Windows 3.1 installs printer ports LPT1.DOS and LPT2.DOS. The .OS2 extension and the .DOS extension function the same. This information applies to all LPT ports. For more information, query on the following words in the Microsoft Knowledge Base: 

   LPT1.OS2 print

KBCategory: kbprint kbsetup
KBSubcategory: win31
Additional reference words: 3.10

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Last reviewed: November 21, 1994
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