Scroll Functions

scroll( unsigned char num, unsigned int x, unsigned int y, unsigned char top, unsigned char bottom, unsigned char disp );

Define screen window 'num'. Up to four window can be defined. 'top' and 'bottom' are the screen top and bottom limits of the window (limits are included in the window area). 'disp' controls the type of the window, if bit 7 is set background graphics will be displayed in this window, and if bit 6 is set sprites will also be displayed. If none of these bits are set the window will stay blank. 'x' and 'y' are the top-left coordinates of the area in the virtual screen that will be displayed in the window.

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scroll_disable( unsigned char num );

Disable scrolling for the screen window 'num'.

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scroll_split( unsigned char index, unsigned char top, unsigned int x, unsigned int y, unsigned char disp );

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disable_split( unsigned char index );