C64

It seems I/O ports are used in prohibited modes where output pins with active drivers for 1 are driving low by either disk (Transwarp loader) or by joysticks (some games). I wonder how many CIA/VIA chips got broken because of that? Anyway, this release keeps workaround for Transwarp and reverts changes of other CIA ports to allow reading output pins states and fix joysticks for games using CIA in prohibited mode.