is represented by ram bank 0 this base configuration may operate in an 8 bit clut mode this mode allows operation of ram bank 0 as a single frame buffer architecture similar to a vga or xga system in 8 bits per pixel mode the 8 bit clut mode allows for operation of the base configuration as a video only or graphics only subsystem the base configuration may also operate as a sfba system with limited graphics video integration 8 bits pixel as described in the background section above in the 8 bit clut mode the bandwidth of data bus 130 is the same as would be required for a stand alone 8 bit clut graphics subsystem means 120 for receiving a second storage means allows the base configuration of the present invention to be easily upgraded by the mere addition of a second storage means to operate either as i an integrated system for storing and displaying both graphics and video information 34 the dual color space mode 34 or as ii an expanded single frame buffer for storing and displaying either graphics only or video only information at a deepened pixel depth and or increased resolution level 34 the expanded single frame buffer mode 34 in the dual color space mode a first type of visual data may be stored in first storage means 110 in a first format and a second type of visual data may be stored in a second storage means in a second format which is different from the first format for example graphics data may be stored in first storage means 110 in rgb format and video data may be stored in the.