                        TRANSBIOS PACKET DRIVER
                              Version 9.1
                Copyright 1992 Invisible Software, Inc.



       [See GUIDE.TXT for a list of all manuals and text files.]






TABLE OF CONTENTS

1.  Introduction
2.  Installing the Packet Driver
3.  Uninstalling the Packet Driver
4.  Advanced Installation Options






1.  INTRODUCTION


     TBPD.COM is a packet driver that runs on top of TransBIOS.  It lets
any packet driver application operate in conjunction with Invisible LAN.
The packet driver provides a standard programming interface that allows
applications to communicate on the network.

     The most common packet driver applications are TCP/IP and FTP.
These applications use standardized network protocols to transfer files
on the network.  TCP/IP and FTP allow your PC to communicate with other
PCs, with UNIX file servers, with SUN workstations, and even with
mainframe hosts.  They also let you link in to wide-area networks.

     TBPD is a type of packet driver known as a "Clarkson" driver.
There are a large number of Clarkson packet drivers for different
network boards.  TBPD behaves much the same as any other Clarkson packet
driver.  However, unlike most drivers, TBPD does not interact directly
with the Ethernet hardware.  Instead, TBPD works by making calls to
TransBIOS.  Therefore, TBPD itself is hardware-independent, and can be
used with any Ethernet board supported by TransBIOS.




2.  INSTALLING THE PACKET DRIVER


     To install the TransBIOS packet driver, you must first install
TransBIOS.  Then, enter the following command exactly as shown:

                TBPD  0x60

     When TBPD loads, it displays a copyright message and the address of
your Ethernet board.  Once TBPD is loaded, you can run your packet
driver applications.

     TBPD only works on Ethernet networks.  TBPD requires TransBIOS
version 5.1 or later.




3.  UNINSTALLING THE PACKET DRIVER


     When you are finished using the packet driver, you can remove it
from memory.  To remove the packet driver, enter the following command:

                TERMIN  0x60




4.  ADVANCED INSTALLATION OPTIONS


     TBPD has several advanced installation options that you can use to
configure it.  The full set of options is:


                TBPD  [-n]  [-d]  [-w]  packet_int

                  -n            Optional parameter that tells the packet
                                driver to modify Novell IPX packets.  If
                                you are running an application that
                                communicates with a Novell file server,
                                you may need to use the -n option.

                  -d            Optional parameter that tells the packet
                                driver not to initialize itself until
                                you actually load a packet driver
                                application.

                  -w            Optional parameter that installs limited
                                support for Microsoft Windows.  If you
                                are running Windows, you must install
                                the packet driver before starting
                                Windows.  With Windows, application
                                programs can be swapped in and out of
                                memory.  The -w option tells the packet
                                driver not to attempt to deliver
                                incoming packets to an application that
                                has been swapped out of memory.

                  packet_int    The software interrupt used to
                                communicate with the packet driver.  The
                                standard value is 0x60, however you can
                                use any value between 0x60 and 0x80,
                                provided that no other software in your
                                computer is using the interrupt.  The
                                "0x" prefix means that the interrupt
                                number is given in hexadecimal.  You
                                must enter the "0x" prefix on the TBPD
                                command line.


     When you use TERMIN to remove the packet driver from memory, you
enter the command as:


                TERMIN  packet_int

                  packet_int    The software interrupt used to
                                communicate with the packet driver.  Its
                                value must be the same as what you used
                                on the TBPD command line.
