Not seen on other hardware, but on the IBM 5155, the "XT Portable", the keyboard doesn't work with TLVC.
Works fine with DOS, serial io is not affected. Also works fine with COMPAQ Portable Plus, also an XT class machine. Since the 5155 has a standard XT mainboard, this problem presumably hits all IBM PC and XT models.
Not seen on other hardware, but on the IBM 5155, the "XT Portable", the keyboard doesn't work with TLVC.
Works fine with DOS, serial io is not affected. Also works fine with COMPAQ Portable Plus, also an XT class machine. Since the 5155 has a standard XT mainboard, this problem presumably hits all IBM PC and XT models.