Play3401 1.3

This is a minor fix of play3401 1.2 for use on NS/HP-PA.

From the original 1.2 README:
[...]
Play3401 is a program which reads the contents audio CDs, transfers them
digitally over the SCSI bus to the NeXT itself and then plays them on the
host system. As currently there is not yet a standard set of SCSI commands
for this task, all the CD ROM drives which can do this do it in mutually
incompatible ways.  As a consequence this reader work only with the
Toshiba 3401 series of CD ROM drives.
[...]
        Carl Edman                                         2-3-93
        <cedman@princeton.edu>
--

It should also be noted that play3401 can be used to record to disk also.

Most of the changes were minor tweaks to the SCSI command blocks which
have different alignment properties on the HP-PA.

Read HP-WARNING, very important.

Chris Lloyd
lloyd@yrrid.com