This code is a port of the FreeBSD ppbus drivers, by Gary Thorpe
<gathorpe79@yahoo.com>. THe files are:

ppbus.diff.small - reduced diff for only those files that already
existed in the kernel source tree and where changed (needs patch -p4 to
apply to src/sys/...)
 
ppbus.tar.gz - gzipped tarball of the ppbus-related files relative to
src/
 
lptctl.tar.gz - small program to control the lpt device, contains
source file, man source and makefile