TECHNICAL INFORMATION DOCUMENT

TITLE:  PTF195 - Corrections to the en596 ethernet adapter driver.
DATE:  05JUN95
README FOR:  PTF195
PRODUCT and VERSION:

UnixWare 1.1


Installation Instructions:  

DATATYPE: datastream

1.  Download the ptf195.Z and ptf195.txt files to the /tmp directory  
    on your machine.

2.  Read the release notes contained in this file and follow the 
    instuctions to add the package to your system.

3.  Now become root, uncompress the file and add the package to your 
    system using the following commands:

        $ su
        # uncompress /tmp/ptf195.Z
        # pkgadd -d /tmp/ptf195

ENGINEERING REALEASE NOTES
--------------------------

These release notes acquaint you with the contents of UnixWare PTF195 -
Corrections to the en596 ethernet adapter driver.

1. General Description

	This ptf fixes several problems with the en596 ethernet adapter 
	driver. Most notable among these problems is the occasional 
	failure of npsd to start, completely garbling the incomming
	packets causing numerous resends and then aborts, and intermittent
	hangs of the controller.


2. New Features

	This ptf contains a fairly large rewrite of the en596 driver. It
	uses different algorithms for memory management. It also replaces
	three header (.h) files - en596.h, dlpi_ether.h and dlpi_en596.h.
	This will require that any customer built or third-party utilities
	or applications that include these header files be rebuilt after
	the installation of this patch. This is very important for correct
	operation of these programs.


3. Software Notes and Recommendations

	This patch should be installed on all UnixWare 1.1.2 systems which 
	have the en596 ethernet adapter installed and exhibit any of the 
	above problems.

	This patch requires UnixWare Update 1.1.2 and the en596 driver to be
	installed on the system.  The package will NOT install if the required
	system configuration is not present.

	This patch also requires manual reconfiguration of the base interupt
    for the NIC. The settings are maintained in /etc/conf/sdevice.d/en596
    so this file should be printed out before installation of this patch.


4. Hardware Notes and Recommendations

	None 


5. Installation Instructions

	Depending on the format:

        If this PTF was delivered on a diskette, then (as "root")
		pkgadd -d diskette1
	should install this patch.

	Otherwise, if you have a file such as "ptf195" which is in a "stream"
	format, then (as "root")
		pkgadd -d <pwd>/ptf195 
	will work.
	
	After installing this patch, a system reboot will be needed to rebuild
	the kernel and incorporate the updated driver(s).