Added an interrupt entry point for the drivers.
Rewrote tgi_unload to avoid problems with the tgi_drv pointer.
git-svn-id: svn://svn.cc65.org/cc65/trunk@3284 b7a2c559-68d2-44c3-8de9-860c34a00d81
Rename tgi_setup to tgi_install.
Make tgi_install and tgi_deinstall user callable.
More cosmetic changes.
git-svn-id: svn://svn.cc65.org/cc65/trunk@1966 b7a2c559-68d2-44c3-8de9-860c34a00d81