Dear SCO Customer,

Support Level Supplement (SLS) ptf7215b, the UnixWare 7.0.1 iasy Driver 
Supplement, addresses the following problems:

1. The 'TCSETAW' ioctl hangs if an XOFF character has been received on 
   the serial port.  The hang occurs if an XOFF character is received 
   as the last data is being SENT.  If an unanswered XOFF is received 
   (an XON is not received) just before the ioctl (fd, TCSETAW, &term) 
   command is issued, the TCSETAW function will never complete.

2. When accessing a standard COM1 onboard serial port at greater than 
   19200 baud, a loss of characters can be seen. This has been seen with
   both hardware flow control and software flow control enabled.


Contents
--------

        /etc/conf/pack.d/iasy/Driver_atup.o
        /etc/conf/pack.d/iasy/Driver_mp.o


Software Notes and Recommendations
----------------------------------

SLS ptf7215b should only be installed on:

        UnixWare 7 Release 7.0.1


Installation Instructions
-------------------------

1. Download the ptf7215b.Z file to the /tmp directory on your machine.

2. As root, uncompress the file and add the SLS package to your system 
   using these commands:

        $ su
        Password: <type your root password>
        # uncompress /tmp/ptf7215b.Z
        # pkgadd -d /tmp/ptf7215b
        # rm /tmp/ptf7215b

Alternatively, SLS ptf7215b has the option of being installed in quiet
mode, that is, without displaying the release notes and asking for
installation confirmation. To do this, use these commands:

        $ su
        Password: <type your root password>
        # uncompress /tmp/ptf7215b.Z
        # pkgadd -qd /tmp/ptf7215b all
        # rm /tmp/ptf7215b

3. Reboot the system after installing this SLS package.

The release notes displayed prior to installation can be found in:

        /var/sadm/pkg/ptf7215/install/ptf7215.txt


Removal Instructions
--------------------

1. As root, remove the SLS package using these commands:

        $ su
        Password: <type your root password>
        # pkgrm ptf7215

2. Reboot the system after removing this SLS package.


If you have questions regarding this SLS, or the product on which 
it is installed, please contact your software supplier.