Definition of Mode-X

320x240x8bpp un-chained. ModeX is a term that Michael Abrash invented. This is an un-chained video mode, which means that you have to use a form of bank switching to access all the screen memory. Some benefits of this mode are hardware page flipping, multiple on-card virtual buffers (sometimes referred to as double buffers), fast horizontal line fills (used for *very* fast solid filled polygons), and hardware scrolling. Some drawbacks of this mode are that it is difficult to code for and isn't any faster than Mode 13h on a PC today. This mode isn't supported by our VESA library, since it is outdated and doesn't offer anything we can't already do in a higher resolution through software.
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