Platformer demo

[shicky256]

The TLCS-900/H has multiple timer peripherals, one with an external clock input. On the NGPC, this is clocked by the horizontal sync counter. If you tell it to fire an interrupt when the timer is at a certain value, you can manipulate the scroll position register to artificially induce screen tearing. None of the "multiple scrolling background planes" actually overlap each other on the y axis so this produces the illusion of more layers than there are. See my code for more information.