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<table class="head">
<tr>
<td class="head-ltitle">RGBASM(1)</td>
<td class="head-vol">General Commands Manual</td>
<td class="head-rtitle">RGBASM(1)</td>
</tr>
</table>
<div class="manual-text">
<section class="Sh">
<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
<code class="Nm">rgbasm</code> —
<div class="Nd">Game Boy assembler</div>
</section>
<section class="Sh">
<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
<table class="Nm">
<tr>
<td><code class="Nm">rgbasm</code></td>
<td>[<code class="Fl">-EhLVvw</code>] [<code class="Fl">-b</code>
<var class="Ar">chars</var>] [<code class="Fl">-D</code>
<var class="Ar">name</var>[=<var class="Ar">value</var>]]
[<code class="Fl">-g</code> <var class="Ar">chars</var>]
[<code class="Fl">-i</code> <var class="Ar">path</var>]
[<code class="Fl">-M</code> <var class="Ar">dependfile</var>]
[<code class="Fl">-o</code> <var class="Ar">outfile</var>]
[<code class="Fl">-p</code> <var class="Ar">pad_value</var>]
[<code class="Fl">-r</code> <var class="Ar">recursion_depth</var>]
<var class="Ar">file</var></td>
</tr>
</table>
</section>
<section class="Sh">
<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
The <code class="Nm">rgbasm</code> program creates an object file from an
assembly source file. The input <var class="Ar">file</var> can be a file path,
or <code class="Cm">-</code> denoting <code class="Cm">stdin</code>. Its
arguments are as follows:
<dl class="Bl-tag">
<dt><a class="permalink" href="#b"><code class="Fl" id="b">-b</code></a>
<var class="Ar">chars</var></dt>
<dd>Change the two characters used for binary constants. The defaults are
01.</dd>
<dt><a class="permalink" href="#D"><code class="Fl" id="D">-D</code></a>
<var class="Ar">name</var>[=<var class="Ar">value</var>]</dt>
<dd>Add string symbol to the compiled source code. This is equivalent to
<var class="Ar">name</var> <code class="Cm">EQUS</code>
“<var class="Ar">value</var>” in code. If a value is not
specified, a value of 1 is given.</dd>
<dt><a class="permalink" href="#E"><code class="Fl" id="E">-E</code></a></dt>
<dd>Export all labels, including unreferenced and local labels.</dd>
<dt><a class="permalink" href="#g"><code class="Fl" id="g">-g</code></a>
<var class="Ar">chars</var></dt>
<dd>Change the four characters used for binary constants. The defaults are
0123.</dd>
<dt><a class="permalink" href="#h"><code class="Fl" id="h">-h</code></a></dt>
<dd>By default, <code class="Nm">rgbasm</code> inserts a ‘nop’
instruction immediately after any ‘halt’ instruction. The
<code class="Fl">-h</code> option disables this behavior.</dd>
<dt><a class="permalink" href="#i"><code class="Fl" id="i">-i</code></a>
<var class="Ar">path</var></dt>
<dd>Add an include path.</dd>
<dt><a class="permalink" href="#L"><code class="Fl" id="L">-L</code></a></dt>
<dd>Disable the optimization that turns loads of the form <b class="Sy">LD
[$FF00+n8],A</b> into the opcode <b class="Sy">LDH [$FF00+n8],A</b> in
order to have full control of the result in the final ROM.</dd>
<dt><a class="permalink" href="#M"><code class="Fl" id="M">-M</code></a>
<var class="Ar">dependfile</var></dt>
<dd>Print <a class="Xr">make(1)</a> dependencies to
<var class="Ar">dependfile</var>.</dd>
<dt><a class="permalink" href="#o"><code class="Fl" id="o">-o</code></a>
<var class="Ar">outfile</var></dt>
<dd>Write an object file to the given filename.</dd>
<dt><a class="permalink" href="#p"><code class="Fl" id="p">-p</code></a>
<var class="Ar">pad_value</var></dt>
<dd>When padding an image, pad with this value. The default is 0x00.</dd>
<dt><a class="permalink" href="#r"><code class="Fl" id="r">-r</code></a>
<var class="Ar">recursion_depth</var></dt>
<dd>Specifies the recursion depth at which RGBASM will assume being in an
infinite loop.</dd>
<dt><a class="permalink" href="#V"><code class="Fl" id="V">-V</code></a></dt>
<dd>Print the version of the program and exit.</dd>
<dt><a class="permalink" href="#v"><code class="Fl" id="v">-v</code></a></dt>
<dd>Be verbose.</dd>
<dt><a class="permalink" href="#w"><code class="Fl" id="w">-w</code></a></dt>
<dd>Disable warning output.</dd>
</dl>
</section>
<section class="Sh">
<h1 class="Sh" id="EXAMPLES"><a class="permalink" href="#EXAMPLES">EXAMPLES</a></h1>
You can assemble a source file in two ways. Straight forward way:
<div class="Bd Pp Bd-indent">
<pre>
$ rgbasm -o bar.o foo.asm
</pre>
</div>
<p class="Pp">Pipes way:</p>
<div class="Bd Pp Bd-indent">
<pre>
$ cat foo.asm | rgbasm -o bar.o -
$ rgbasm -o bar.o - < foo.asm
</pre>
</div>
<p class="Pp">The resulting object file is not yet a usable ROM image —
it must first be run through <a class="Xr">rgblink(1)</a> and
<a class="Xr">rgbfix(1)</a>.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
ALSO</a></h1>
<a class="Xr">rgbasm(5)</a>, <a class="Xr">rgbfix(1)</a>,
<a class="Xr">rgblink(1)</a>, <a class="Xr">rgbds(5)</a>,
<a class="Xr">rgbds(7)</a>, <a class="Xr">gbz80(7)</a>
</section>
<section class="Sh">
<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1>
<code class="Nm">rgbasm</code> was originally written by Carsten Sørensen
as part of the ASMotor package, and was later packaged in RGBDS by Justin
Lloyd. It is now maintained by a number of contributors at
<a class="Lk" href="https://github.com/rednex/rgbds">https://github.com/rednex/rgbds</a>.
</section>
</div>
<table class="foot">
<tr>
<td class="foot-date">July 8, 2019</td>
<td class="foot-os">RGBDS Manual</td>
</tr>
</table>
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