-<!doctype linuxdoc system>
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-<article>
-<title>Special math functions
-<author>Christian Krüger
-
-<abstract>
-This library provides functions for speed optimized math operations.
-</abstract>
-
-<!-- Table of contents -->
-<toc>
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-<!-- Begin the document -->
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-<sect>Multiplication<p>
-
-When accessing screen memory often a multiplication of the vertical position is needed to calculate
-the target address. A quite common horizontal span for 8-bit systems is 20 or 40 bytes (beside e.g. 32 bytes, where the multiplication can be accomplished by shifting 5 times).
-
-<p>
-<tscreen><verb>
- unsigned int __fastcall__ _mul20(unsigned char value);
-</verb></tscreen>
-
-The 8 bit <tt>value</tt> is multiplied by 20 and returned as 16 bit value.
-</p>
-
-<p>
-<tscreen><verb>
- unsigned int __fastcall__ _mul40(unsigned char value);
-</verb></tscreen>
-
-The 8 bit <tt>value</tt> is multiplied by 40 and returned as 16 bit value.
-</p>
-
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-</article>