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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>
89 lines
2.2 KiB
HTML
89 lines
2.2 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 RSSET, RSRESET, RB, RW</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>RSSET<BR>
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RERESET<BR>
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RB<BR>
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RW</H2></I><HR>
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<P>The <B>RS</B> group of commands is a handy way of defining structures:<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> RSRESET
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str_pStuff RW 1
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str_tData RB 256
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str_bCount RB 1
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str_SIZEOF RB 0</PRE>
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</FONT></TD>
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</TR>
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</TABLE>
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<P>The example defines four <A HREF="equ.htm">equated</A> symbols:<BR>
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<BR>
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<TABLE BORDER=1>
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<CAPTION><I>Defined symbols</I></CAPTION>
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<TR>
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<TD><B><I>Name</I></B></TD>
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<TD><B><I>Value</I></B></TD>
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</TR>
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<TR>
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<TD>str_pStuff</TD>
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<TD>0</TD>
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</TR>
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<TR>
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<TD>str_tData</TD>
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<TD>2</TD>
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</TR>
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<TR>
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<TD>str_bCount</TD>
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<TD>258</TD>
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</TR>
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<TR>
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<TD>str_SIZEOF</TD>
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<TD>259</TD>
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</TR>
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</TABLE>
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<BR>
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There are four commands in the RS group of commands:<BR>
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<BR>
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<TABLE BORDER=1>
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<CAPTION><I>RS related commands</I></CAPTION>
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<TR>
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<TD><B><I>Command</I></B></TD>
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<TD><B><I>Meaning</I></B></TD>
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</TR>
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<TR>
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<TD>RSRESET</TD>
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<TD>Resets the <A HREF="presym.htm">_RS</A> counter to zero</TD>
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</TR>
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<TR>
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<TD>RSSET <I>constexpr</I></TD>
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<TD>Sets the <A HREF="presym.htm">_RS</A> counter to <I>constexpr</I></TD>
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</TR>
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<TR>
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<TD>RB <I>constexpr</I></TD>
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<TD>Sets the preceding symbol to <A HREF="presym.htm">_RS</A> and adds <I>constexpr</I> to _RS</TD>
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</TR>
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<TR>
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<TD>RW <I>constexpr</I></TD>
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<TD>Sets the preceding symbol to <A HREF="presym.htm">_RS</A> and adds <I>constexpr*2</I> to _RS</TD>
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</TR>
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</TABLE>
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<P>Note that a colon (:) following the symbol-name is not allowed. RS symbols can be exported and imported. They don't change their value during the link process.<BR>
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<H3>See also:</H3>
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<UL>
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<LI><A HREF="expr_int.htm">Integer and Boolean expressions</A>
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</UL>
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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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