Limited category list

hi, when i click in sidebar on any category it list limited only 10 posts with More and Previous links.

Is it possible to increase this limit or disable limit ?
Where can i find this limit ?

<?php
get_header();
?>

<div id="content">
<!-- MAIN CONTENT -->
<div id="main">
<div class="right_side">

<!-------first layer---------->
<dl>
			<?php if (have_posts()) : ?>

			<?php $post = $posts[0]; // Hack. Set $post so that the_date() works. ?>
			<?php /* If this is a category archive */ if (is_category()) { ?>
			<h2>Archive for the '<?php echo single_cat_title(); ?>' Category (<em>Chronologically Listed</em>)</h2>

			<?php /* If this is a daily archive */ } elseif (is_day()) { ?>
			<h2>Archive for <?php the_time('F jS, Y'); ?></h2>

		 <?php /* If this is a monthly archive */ } elseif (is_month()) { ?>
			<h2>Archive for <?php the_time('F, Y'); ?></h2>

			<?php /* If this is a yearly archive */ } elseif (is_year()) { ?>
			<h2>Archive for <?php the_time('Y'); ?></h2>

			<?php /* If this is a search */ } elseif (is_search()) { ?>
			<h2>Search Results</h2>

			<?php /* If this is an author archive */ } elseif (is_author()) { ?>
			<h2>Author Archive</h2>

			<?php /* If this is a paged archive */ } elseif (isset($_GET['paged']) && !empty($_GET['paged'])) { ?>
			<h2>Blog Archives</h2>

			<?php } ?>

		 <ul class="dates">

		 	<?php while (have_posts()) : the_post(); ?>
			<li><a href="<?php the_permalink() ?>"><?php the_title(); ?></a> |
			<small>
			<!-- Posted by <?php the_author() ?> on --> <?php the_time('d M Y');?> under <?php the_category(', ') ?>
			</small>
			</li>

			<?php endwhile; ?>
		</ul>

		<div class="navigation">
			<div class="left"><?php next_posts_link('More &laquo;') ?></div>
			<div class="right"><?php previous_posts_link('&raquo; Previous ') ?></div>
		</div>

	<?php else : ?>

		<h1>Not Found</h1>

	<?php endif; ?>

<div class="clear">
</div>
</dl>
<!-------end first layer---------->

</div>

<?php get_sidebar(); ?>

<?php get_footer(); ?>

thx for reply