 X variable the location at which the BASIC program was loaded. In other words, this is where
the execution of the BASIC program by the interpreter starts. We also have:</p>

<pre>
x = RAMSTART
</pre>

<p>This is one byte on from the end of the BASIC code. Therefore this is empty memory which you can use, up until the 65536 mark.
You can LOAD and SAVE files in here, PEEK and POKE around, and do what you want without it impacting the operating system or BASIC program.</p>



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