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James Gregory 2013-12-30 12:25:34 +11:00
commit 9e52de9586
233 changed files with 128 additions and 128 deletions

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<P>The first thing you&#146;ll notice when you run this code is that the speed of 360&#215;480 256-color mode is pretty good, especially considering that most of the program is im-plemented in C.
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<TABLE WIDTH="100%"><TD VALIGN="TOP" ALIGN="LEFT" WIDTH="5%"><IMG SRC="images/32-01i.jpg"><TD VALIGN="TOP" ALIGN="LEFT" WIDTH="95%"><SMALL><I>Drawing in 360&#215;480 256-color mode can sometimes actually be faster than in the 16-color modes, because the byte-per-pixel display memory organization of 256-color mode eliminates the need to read display memory before writing to it in order to isolate individual pixels coexisting within a single byte. In addition, 360&#215;480 256-color mode is a variant of Mode X, which we&#146;ll encounter in detail in Chapter 47, and supports all the high-performance features of Mode X.</I></SMALL>
<TABLE WIDTH="100%"><TD VALIGN="TOP" ALIGN="LEFT" WIDTH="5%"><IMG SRC="images/i.jpg"><TD VALIGN="TOP" ALIGN="LEFT" WIDTH="95%"><SMALL><I>Drawing in 360&#215;480 256-color mode can sometimes actually be faster than in the 16-color modes, because the byte-per-pixel display memory organization of 256-color mode eliminates the need to read display memory before writing to it in order to isolate individual pixels coexisting within a single byte. In addition, 360&#215;480 256-color mode is a variant of Mode X, which we&#146;ll encounter in detail in Chapter 47, and supports all the high-performance features of Mode X.</I></SMALL>
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