This Patch provides you with the SunOS 4.1.3 device-drivers for CD-ROM drives.
It includes the Rock-Ridge format.

This Path is for sun3/3x only!

Important change: Support for Rock-Ridge format in CD-Rom Driver

Install as root with the following commands:

Sun3:

mv /sys/sun3/OBJ/hsfs_node.o /sys/sun3/OBJ/hsfs_node.o.411
mv /sys/sun3/OBJ/hsfs_subr.o /sys/sun3/OBJ/hsfs_subr.o.411
mv /sys/sun3/OBJ/hsfs_vfsops.o /sys/sun3/OBJ/hsfs_vfsops.o.411
mv /sys/sun3/OBJ/hsfs_vnodeops.o /sys/sun3/OBJ/hsfs_vnodeops.o.411
cp sun3/hsfs_*.o /sys/sun3/OBJ

Sun3x:

mv /sys/sun3x/OBJ/hsfs_node.o /sys/sun3x/OBJ/hsfs_node.o.411
mv /sys/sun3x/OBJ/hsfs_subr.o /sys/sun3x/OBJ/hsfs_subr.o.411
mv /sys/sun3x/OBJ/hsfs_vfsops.o /sys/sun3x/OBJ/hsfs_vfsops.o.411
mv /sys/sun3x/OBJ/hsfs_vnodeops.o /sys/sun3x/OBJ/hsfs_vnodeops.o.411
cp sun3x/hsfs_*.o /sys/sun3x/OBJ

Common:

mv /usr/include/hsfs /usr/include/hsfs.411
chmod 000 /usr/include/hsfs.411
mkdir /usr/include/hsfs
chmod 755 /usr/include/hsfs
cp *.h /usr/include/hsfs
chmod 444 /usr/include/hsfs/*

Edit /sys/conf.common/files.cmn accordingly to this diff:

*** /tmp/files.cmn      Sun Nov 10 06:51:51 1996
--- /sys/conf.common/files.cmn  Sat Nov  9 19:50:24 1996
***************
*** 10,13 ****
--- 10,16 ----
  hsfs/hsfs_node.c      optional HSFS
  hsfs/hsfs_subr.c      optional HSFS
+ hsfs/hsfs_susp.c      optional HSFS
+ hsfs/hsfs_rrip.c      optional HSFS
+ hsfs/hsfs_susp_subr.c optional HSFS
  hsfs/hsfs_vfsops.c    optional HSFS
  hsfs/hsfs_vnodeops.c  optional HSFS

Generate a new Kernel:

cd /sys/`arch -k`/conf
setenv KERNELNAME `cat /etc/motd | sed -e "s/.*(//" | sed -e "s/).*//"`
config $KERNELNAME
cd ../$KERNELNAME
make

Install the new Kernel:

mv /vmunix /vmunix.old
mv vmunix /
reboot