This patch provides reliable hardware handshake (RTS/CTS) for the builtin serial lines of all Sun3's under SunOS 4.1.1. Important change: RTS/CTS for all Sun3's under SunOS 4.1.1. The problem is mentioned in every jumbo tty patch, but despite they promised it, Sun aparently never fixed this bug. This is only a software problem, because Sparcs (which use the same ol' Zilog 8350 chips than the Sun3's) under Solaris CAN do hardware handshake (and of course NOT under SunOS 4.1.X). Hint: You should install the latest jumbo tty patch (100513-04) before. Many thanks to Brian Katzung (katzung@katsun.chi.il.us) for fixing this annoying problem. --------------------------------------------------------------------------- To install this patch, type as root: mv /sys/`arch -k`/OBJ/zs_async.o /sys/`arch -k`/OBJ/zs_async.o.old cp `arch -k`/zs_async.o /sys/`arch -k`/OBJ Build 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