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<title>RGBLINK(5)</title>
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<table class="head">
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<td class="head-ltitle">RGBLINK(5)</td>
<td class="head-vol">File Formats Manual</td>
<td class="head-rtitle">RGBLINK(5)</td>
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<h1 class="Sh" title="Sh" id="NAME"><a class="selflink" href="#NAME">NAME</a></h1>
<b class="Nm" title="Nm">rgblink</b> —
<span class="Nd" title="Nd">linkerscript file format</span>
<h1 class="Sh" title="Sh" id="DESCRIPTION"><a class="selflink" href="#DESCRIPTION">DESCRIPTION</a></h1>
The linkerscript is an external file that allows the user to specify the order
of sections without the need for doing so before assembling each object file.
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The placement of sections specified in the linkerscript is done before the
sections whose placement is defined in the source code.
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A linkerscript consists on a series of banks followed by a list of sections and,
optionally, commands. They can be lowercase or uppercase, it is ignored. Any
line can contain a comment starting with
‘<code class="Li">;</code>’ that ends at the end of the line:
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<div class="Bd" style="margin-left: 5.00ex;">
<pre class="Li">
ROMX $F ; This is a comment
"Functions to read array"
ALIGN 8
"Array aligned to 256 bytes"
WRAMX 2
"Some variables"
</pre>
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Numbers can be in decimal or hexadecimal format (the prefix is
‘<code class="Li">$</code>’). It is an error if any bank or
command is found before setting a bank.
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Files can be included by using the <var class="Ar" title="Ar">INCLUDE</var>
keyword followed by a string with the path of the file that has to be
included.
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The possible bank types are: <b class="Sy" title="Sy">ROM0</b>,
<b class="Sy" title="Sy">ROMX</b>, <b class="Sy" title="Sy">VRAM</b>,
<b class="Sy" title="Sy">WRAM0</b>, <b class="Sy" title="Sy">WRAMX</b>,
<b class="Sy" title="Sy">OAM</b> and <b class="Sy" title="Sy">HRAM</b>. Types
<b class="Sy" title="Sy">ROMX</b>, <b class="Sy" title="Sy">VRAM</b>,
<b class="Sy" title="Sy">WRAMX</b> and <b class="Sy" title="Sy">SRAM</b> are
banked, which means that it is needed to specify a bank after the type.
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When a new bank statement is found, sections found after it will be placed right
from the beginning of that bank. If the linkerscript switches to a different
bank and then it comes back to the previous one it will continue from the last
address that was used.
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The only two commands are <var class="Ar" title="Ar">ORG</var> and
<var class="Ar" title="Ar">ALIGN</var>:
<ul class="Bl-bullet">
<li class="It-bullet"><var class="Ar" title="Ar">ORG</var> sets the address in
which new sections will be placed. It can not be lower than the current
address.</li>
<li class="It-bullet"><var class="Ar" title="Ar">ALIGN</var> will increase the
address until it is aligned to the specified boundary (it tries to set to
0 the number of bits specified after the command:
<b class="Sy" title="Sy">ALIGN 8</b> will align to $100).</li>
</ul>
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Note: The bank, alignment, address and type of sections can be specified both in
the source code and in the linkerscript. For a section to be able to be placed
with the linkerscript the bank must be left unassigned in the source code or
be the same as the one specified in the linkerscript. The address and
alignment musn't be set.
<h1 class="Sh" title="Sh" id="SEE_ALSO"><a class="selflink" href="#SEE_ALSO">SEE
ALSO</a></h1>
<a class="Xr" title="Xr">rgbasm(1)</a>, <a class="Xr" title="Xr">rgblink(1)</a>,
<a class="Xr" title="Xr">rgbfix(1)</a>, <a class="Xr" title="Xr">rgbds(5)</a>,
<a class="Xr" title="Xr">rgbds(7)</a>
<h1 class="Sh" title="Sh" id="HISTORY"><a class="selflink" href="#HISTORY">HISTORY</a></h1>
<b class="Nm" title="Nm">rgblink</b> 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" title="Lk" href="https://github.com/rednex/rgbds">https://github.com/rednex/rgbds</a>.</div>
<table class="foot">
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<td class="foot-date">April 17, 2017</td>
<td class="foot-os">RGBDS Manual</td>
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