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The code comes from the RGBDS source and documentation zip files found on this website: http://www.otakunozoku.com/1999/08/01/rednex-gameboy-development-system/ The same website reports: "Best of all, it’s free! That’s right! Free! The executables are free to use, either for personal hobby use, or full blown commercial productions — I know of at least a dozen commercial games you can purchase that are written with RGBDS — and the source code is free to modify. "The only thing I ask is that you do not charge for either distributing the executables or source code, and any derivative works you give credit to the original authors of the tools. That means you have to say “Thanks” to the original authors SurfSmurf and Otaku." Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
29 lines
1.3 KiB
HTML
29 lines
1.3 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
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<HTML>
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<HEAD>
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<TITLE>xAsm Labels</TITLE>
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</HEAD>
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<BODY BGCOLOR="#692764" TEXT="#F5A0D8" LINK="#8AAEE6" VLINK="#2B9DA4" ALINK="#95F0DA">
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<I><H2>Labels</H2></I><HR>
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<P>One of the assemblers main tasks is to keep track of addresses for you so you don't have to remember obscure numbers but can make do with a meaningful name, a label.<BR>
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<P>This can be done in a number of ways:<BR>
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<BR>
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<TABLE BORDER=0 BGCOLOR="Black" CELLPADDING=8 WIDTH="50%">
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<TR>
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<TD><FONT COLOR="#00FF00">
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<PRE>GlobalLabel
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AnotherGlobal:
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.locallabel
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.yet_a_local:
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ThisWillBeExported:: ;note the two colons</PRE>
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</FONT></TD>
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</TR>
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</TABLE>
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<P>This is very similar to other assemblers. Local labels are only accessible within the scope they are defined. A scope starts after a global label and ends at the next global label. You may or may not have seen the <B>::</B> feature before. It declares a normal global label but does an <A HREF="export.htm">EXPORT</A> at the same time.<BR>
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<P>Labels will normally change their value during the <A HREF="../link.htm">link process</A> and are thus <B>not</B> constant.<BR>
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<BR>
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<BR><HR>
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<FONT SIZE="-1"><I><P ALIGN=RIGHT>Last updated 21 June 1997 by <A HREF="mailto:surfsmurf@matilde.demon.co.uk">Carsten Sorensen</A></P></I></FONT>
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