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James Gregory 2013-12-30 20:26:41 +11:00
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![](images/i.jpg) *In general, performing plane-at-a-time operations can make almost any Mode X operation, at the worst, nearly as fast as the same operation in mode 13H (although this sort of Mode X programming is admittedly fairly complex). In this pursuit, it can help to organize data structures with Mode X in mind. For example, icons could be prearranged in system memory with the pixels organized into four plane-oriented sets (or, again, in four sets per scan line to avoid a fading-in effect) to facilitate copying to the screen a plane at a time with **REP MOVS***
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* * * * *
Graphics Programming Black Book © 2001 Michael Abrash