cbm:
MEMTOP changed (now also returns nr of banks in A)
STOP2 removed (just use STOP)
RDTIM_safe() added TEST IRQ ENABLE
RDTIM16 changed (internally) TEST IRQ ENABLE
cx16:
screen_mode changed (now also returns width and height in X,Y)
kbdbuf_peek2 removed (just use kbdbuf_peek)
joystick_get changed (presence now returned as bool in Y)
joystick_get2 removed (just use joystick_get)
mouse_pos changed (now properly returns x and y position in R0 and R1)
set_led_brightness changed into set_led_state, with only a boolean on/off argument. There is no variable brightness.
sys.set_leds_brightness() removed. Use cx16.set_led_brightness().
