Fixed Z80 banking for Super Visual Football and Alien3. Arabian Fight protection fixed. Support for up to 4 joysticks. Hopefully fixed the problem with uncalibrated joysticks. Fixed crash when pausing with sound disabled.
Second screen is cleared correctly in dual monitor mode.
Fixed a sprite positioning bug. Fixed Alien3 controls for player 1. Fixed start and coin inputs for Alien3. Fixed color 0 masking with lineselection and scrolling. Fixed a bug in mouse steering.