hooked in directly. Alpha change checked by: Matthew Jacob <mjacob@feral.com> i4b ISDN changes checked by: Udo Schweigert <ust@cert.siemens.de> and Hellmuth Michaelis <hm@hcs.de> PC98 changes checked by: Takahashi Yoshihiro <nyan@FreeBSD.org>
uni-directional parallel port should use olpt driver instead of lpt driver. Files ppc.c and ppcreg.h are copied form i386/isa directory with PC98 change. Submitted by: Akio Morita <amorita@meadow.scphys.kyoto-u.ac.jp>