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- DOCUMENT:Q103323 04-NOV-1993 [W_NT]
- TITLE :I/O Channel Ready Settings on the Intel EtherExpress 16
- PRODUCT :Windows NT
- PROD/VER:3.10
- OPER/SYS:WINDOWS
- KEYWORDS:
-
- -----------------------------------------------------------------------
- The information in this article applies to:
-
- - Microsoft Windows NT operating system version 3.1
- - Microsoft Windows NT Advanced Server version 3.1
- -----------------------------------------------------------------------
-
- SUMMARY
- =======
-
- When you install the driver for the Intel EtherExpress 16 local area
- network adapter, one of the configuration fields is I/0 Channel Ready.
- This option can have three possible values: Late, Early, and Never.
- Typically, Windows NT will only allow the user to set this field to
- Later or Never.
-
- MORE INFORMATION
- ================
-
- The I/O Channel Ready settings optimize the timing of 16-bit data
- transfers. The Never value forces the card into 8-bit mode; the Late
- and Early values both allow the card to work in 16-bit mode. The
- setting that works on most computers is Late, although a few computers
- require Early to function in 16-bit mode.
-
- Some computers will experience problems when the card is set to Early.
- These problems can range from data loss when transferring large files
- to computer hangs that require removing the card, transferring it to
- another computer and using the Softset utility to reset the network
- adapter. Because of the potential for serious problems, Windows NT
- setup does not offer Early as one of the options unless one of the
- following is true:
-
- - Setup detects that the card is already set to Early.
-
- -or-
-
- - The .INF file for the Intel EtherExpress has been modified to allow
- the early setting.
-
- Even when the Early option is available, if you select it, you will
- receive the following error message:
-
- Use of the Early setting may cause system failure in some machines.
- Are you sure you want to continue?
-
- While those computers that require Early will not function when the
- card is set to Late, the EtherExpress driver is capable of detecting
- this case and it will default the card to Never, which is always safe.
- Unfortunately, there is no way to detect when Early is not safe
- without experiencing the problems mentioned above.
-
- If you have a computer that requires the Early setting and it is not
- displayed as an option in Windows NT, you can add Early to the list by
- doing the following:
-
- 1. Open the OEMNADIN.INF file in the %systemroot%\SYSTEM32
- subdirectory with a text editor.
-
- 2. Find the line that reads "AllowEarly =" and change the value after
- the equal sign from 0 to 1.
-
- 3. Save the file.
-
- 4. Use the network applet in Control Panel to configure the network
- adapter settings. Early should then show up as an option for
- I/O Channel Ready.
-
- Additional reference words: 3.10 ether express
- KBCategory:
- KBSubCatergory: stp devdrvr
-
- =============================================================================
-
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- Copyright Microsoft Corporation 1993.