To apply patches to TNOS, get the patchkit.* files, place them in your
TNOS source directory, and do a 'make applypatch'. Then do the regular steps
for compiling TNOS.

To apply patches to TNOS, you need the 'patch' executable installed on your
system. Most Unix systems already have it. An MSDOS version can be found
as /tnos/misc/patch12.zip