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<a name="Z80-Directives"></a>
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</div>
<hr>
<a name="Z80-Assembler-Directives"></a>
<h4 class="subsection">9.56.4 Z80 Assembler Directives</h4>
<a name="index-Z80_002donly-directives"></a>

<p><code>as</code> for the Z80 supports some additional directives for
compatibility with other assemblers.
</p>
<p>These are the additional directives in <code>as</code> for the Z80:
</p>
<dl compact="compact">
<dt><code><code>.assume ADL = <var>expression</var></code></code></dt>
<dd><a name="index-_002eassume-directive_002c-Z80"></a>
<p>Set ADL status for eZ80. Non-zero value enable compilation in ADL mode else
used Z80 mode. ADL and Z80 mode produces incompatible object code. Mixing
both of them within one binary may lead problems with disassembler.
</p>
</dd>
<dt><code><code>db <var>expression</var>|<var>string</var>[,<var>expression</var>|<var>string</var>...]</code></code></dt>
<dd><a name="index-db-directive_002c-Z80"></a>
</dd>
<dt><code><code>defb <var>expression</var>|<var>string</var>[,<var>expression</var>|<var>string</var>...]</code></code></dt>
<dd><a name="index-defb-directive_002c-Z80"></a>
</dd>
<dt><code><code>defm <var>string</var>[,<var>string</var>...]</code></code></dt>
<dd><a name="index-defm-directive_002c-Z80"></a>
<p>For each <var>string</var> the characters are copied to the object file, for
each other <var>expression</var> the value is stored in one byte.
A warning is issued in case of an overflow.
Backslash symbol in the strings is generic symbol, it cannot be used as
escape character.  See <a href="Ascii.html#Ascii"><code>.ascii</code></a>.
</p>
</dd>
<dt><code><code>dw <var>expression</var>[,<var>expression</var>...]</code></code></dt>
<dd><a name="index-dw-directive_002c-Z80"></a>
</dd>
<dt><code><code>defw <var>expression</var>[,<var>expression</var>...]</code></code></dt>
<dd><a name="index-defw-directive_002c-Z80"></a>
<p>For each <var>expression</var> the value is stored in two bytes, ignoring
overflow.
</p>
</dd>
<dt><code><code>d24 <var>expression</var>[,<var>expression</var>...]</code></code></dt>
<dd><a name="index-d24-directive_002c-Z80"></a>
</dd>
<dt><code><code>def24 <var>expression</var>[,<var>expression</var>...]</code></code></dt>
<dd><a name="index-def24-directive_002c-Z80"></a>
<p>For each <var>expression</var> the value is stored in three bytes, ignoring
overflow.
</p>
</dd>
<dt><code><code>d32 <var>expression</var>[,<var>expression</var>...]</code></code></dt>
<dd><a name="index-d32-directive_002c-Z80"></a>
</dd>
<dt><code><code>def32 <var>expression</var>[,<var>expression</var>...]</code></code></dt>
<dd><a name="index-def32-directive_002c-Z80"></a>
<p>For each <var>expression</var> the value is stored in four bytes, ignoring
overflow.
</p>
</dd>
<dt><code><code>ds <var>count</var>[, <var>value</var>]</code></code></dt>
<dd><a name="index-ds-directive_002c-Z80"></a>
</dd>
<dt><code><code>defs <var>count</var>[, <var>value</var>]</code></code></dt>
<dd><a name="index-defs-directive_002c-Z80"></a>
<p>Fill <var>count</var> bytes in the object file with <var>value</var>, if
<var>value</var> is omitted it defaults to zero.
</p>
</dd>
<dt><code><code><var>symbol</var> defl <var>expression</var></code></code></dt>
<dd><a name="index-defl-directive_002c-Z80"></a>
<p>The <code>defl</code> directive is like <code>.set</code> but with different
syntax.  See <a href="Set.html#Set"><code>.set</code></a>.
It set the value of <var>symbol</var> to <var>expression</var>. Symbols defined
with <code>defl</code> are not protected from redefinition.
</p>
</dd>
<dt><code><code><var>symbol</var> equ <var>expression</var></code></code></dt>
<dd><a name="index-equ-directive_002c-Z80"></a>
<p>The <code>equ</code> directive is like <code>.equiv</code> but with different
syntax.  See <a href="Equiv.html#Equiv"><code>.equiv</code></a>.
It set the value of <var>symbol</var> to <var>expression</var>. It is an error
if <var>symbol</var> is already defined. Symbols defined with <code>equ</code>
are not protected from redefinition.
</p>
</dd>
<dt><code><code>psect <var>name</var></code></code></dt>
<dd><a name="index-psect-directive_002c-Z80"></a>
<p>A synonym for <code>.section</code>, no second argument should be given.
See <a href="Section.html#Section"><code>.section</code></a>.
</p>
</dd>
<dt><code><code>xdef <var>symbol</var></code></code></dt>
<dd><a name="index-xdef-directive_002c-Z80"></a>
<p>A synonym for <code>.global</code>, make <var>symbol</var> is visible to linker.
See <a href="Global.html#Global"><code>.global</code></a>.
</p>
</dd>
<dt><code><code>xref <var>name</var></code></code></dt>
<dd><a name="index-xref-directive_002c-Z80"></a>
<p>A synonym for <code>.extern</code> (<a href="Extern.html#Extern"><code>.extern</code></a>).
</p>
</dd>
</dl>

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