Changes

*'''superski.dsk''': strange no up/down joystick on first menu, no up/down joystick during big jump. In slalom you can't stop. This game did run correctly before interrupt r52 counter reset implementation.*'''buggyboy.dsk''': I found one dsk running correctly and another not : problem on this last one is about turning left/right effect : the car continues straight.*'''protext.rom''': In edit mode, if I press continuously one key, it does write ten letter and freeze/crash. As a number is incremented in live at top right, I think also about an interrupt vector not long enough.