3Com Mobile Products Group                           Customer Support
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Miniport Driver for Toshiba Tecra 520,530,750 and Libretto 50,60, &70
with Microsoft Windows 95b (OEM Service Release 2 - OSR2)


  Table of Contents
 -------------------------------

  1. Description of this release
  2. Windows 95B 
      2.1 Removing old the installation driver and
          Installing the new driver

1. Description of this release
---------------------------------

   This document details installing the Megahertz Ethernet LAN or
Megahertz Ethernet*Modem under Microsoft Windows 95b (OSR2).
This document assumes the MINIPORT.EXE has been expanded to a floppy disk in the 
A:\ directory.

   Use this disk as the new card's driver, replacing the disk that came with the 
Megahertz card.

List of files from MINIPORT.EXE
MHZC9X   HLP        57,134  03-17-97  2:33p
MFMHZK3  INF        49,775  05-27-97  4:07a
MDMMHZK3 INF        58,406  03-04-97  6:23p
NETMHZK3 INF        10,273  06-02-97 12:38p
OEMSETNT INF        54,792  03-17-97  2:34p
MHZC9X   DLL        30,208  10-21-96 11:26a
MHZNCDET DLL        28,160  03-13-97  5:34p
MHZC9X   SYS        23,040  06-25-97  8:54p

2.0 Windows 95b (OSR2)
   OSR2 is the 2nd service release pack for Windows 95.  This was not available to the
general public but was given to computer manufacturers to install on new machines.
The MINIPORT.EXE drivers will not work on the original 95 systems.  To check your version
click on the "Start" button at the bottom left of the screen, go to Settings, Control
Panel, and select System.  In the System Properties window under the General tab, the
system information will be displayed as:
	System:
		Microsoft Windows 95
		4.00.950 B

2.1 Removing old the driver and Installing the new driver:
---------------------------------------------------------------------------------------

- Assure that your PC Card is inserted. 
- Click Start:Settings:Control Panel. 
- Double click System. 
- Click the Device Manager tab and confirm that you are viewing the devices by type. 
- Look for and delete all references to your PC Card in the following areas. 
  Do this in the order listed below: 

     Multi-function Device
     Modem
     Network Adapter
     Other Devices

  Note: It's OK if you do not find all of the items listed above. 

- Click Close and close the Control Panel. 
- Click Start: Program: Windows Explorer. A window called Exploring c:\ will come up. 
- Click View:Options:Show All Files:OK. 
- Click Tools:Find:Files or Folders. 
- Look for and delete files that Windows Explorer locates under following names: 

     MDMMHZ*.INF
     NETMHZ.INF
     *MHZ*.INF
     MHZC92.VXD

- Close the Find All Files box.  In the Windows Explorer, look in the Windows\Inf\Other
  directory for any files that reference Megahertz or MHZ and remove them.
- Close the Windows Explorer.
- Remove the PCMCIA card.
- Reboot.
- Reinsert the PCMCIA card.
- Install the card by following the card wizard instructions.

  Note:	If the installation wizard can't find a file, notice that it is trying to copy 
        from C:\Windows\Options\Cabs or D:\WIN95.  Simply change the path back to A:\ 
        and click on OK to continue installing from this disk.
	When prompted for the Microsoft Windows 95 installation files, insert your
	CD-ROM and point the path back to D:\Win95, or type in the path to the 
        installation files (typically: c:\windows\options\cabs\).

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