Changes
/* Video (graphics): modes, outputs */ Added Mode 3
*'''Mode 1''': '''320×200''' pixels with 4 colors (2 bpp)
*'''Mode 2''': '''640×200''' pixels with 2 colors (1 bpp)
*'''Mode 3''': '''160x200''' pixels with 4 colors (2bpp) (this is not an official mode, but rather a side-effect of the hardware)
A colour palette of 27 colors was supported, derived from RGB colour space with each component assigned as either off, half on or on. The later '''Plus''' models extended this to 4096 colours and added support for hardware sprites.
