eceiving a byte from the serial port..."
serial rec x
</pre>



<br />

<a name="size"></a>
<h3>SIZE</h3>
<p>Stores the size of the specified file in the S variable and sets R to 0, or sets R to 1 if the
file doesn't exist. Example:</p>

<pre>
size "kernel.bin"
print s
</pre>




<br />

<a name="sound"></a>
<h3>SOUND</h3>
<p>Generate a note from the PC speaker at the specified frequency, for the specified length of time
in 10ths of a second. Example:</p>

<pre>
print "Playing a low-middle-ish C for two sec