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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>
50 lines
1.5 KiB
HTML
50 lines
1.5 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 REPT, ENDR</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>REPT<BR>
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ENDR
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</H2></I>
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<HR>
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<P>Suppose you're feeling lazy and you want to unroll a time consuming loop. <B>REPT</B> is here for that purpose. Everything between REPT and ENDR will be repeated a number of times just as if you done a copy/paste operation yourself<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>REPT 4
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add a,c
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ENDR</PRE>
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</FONT></TD>
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</TR>
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</TABLE>
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<P>This will assemble <B>add a,c</B> four times.<BR>
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<P>You can also use REPT to generate tables on the fly:
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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>; --
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; -- Generate a 256 byte sine table with values between 0 and 128
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; --
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ANGLE SET 0.0
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REPT 256
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DB (MUL(64.0,SIN(ANGLE))+64.0)>>16
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ANGLE SET ANGLE+256.0
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ENDR</PRE>
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</FONT></TD>
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</TR>
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</TABLE>
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REPT is also very useful in recursive macros and as in macros you can also use the special label operator \@. REPT-blocks can be nested.<BR>
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<H3>See also:</H3>
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<UL>
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<LI><A HREF="macro.htm#labelsuffix">\@</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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