Editing Sinclair BASIC (section)

===BASIC64===
''BASIC64'' by [[Timex of Portugal]], is a [[software extension]]<ref>{{Cite web|url=http://timex.comboios.info/tmxtechb64-2048.html|title=Timex tech info – Basic 64 for TC2048|website=timex.comboios.info}}</ref> to allow better Basic programming with the 512×192 and dual display areas graphic modes available only on [[Timex Sinclair]] computers. This extension adds commands and does a complete memory remap to avoid the system overwriting the extended screen memory area. Two versions exist due to different memory maps – a version for [[TC 2048]] and a version for T/S 2068 and [[TC 2068]].
* <code>PRINT #</code> prints to a specific output channel.
* <code>LIST #</code> lists the program to a specific output channel.
* <code>CLS*</code> clears both display areas.
* <code>INK*</code> sets ink colour for both display areas
* <code>PAPER*</code> sets paper colour both display areas
* <code>SCREEN$</code> selects the high / normal resolution modes.
* <code>PLOT*</code> plots a pixel and updates the drawing position.
* <code>LINE</code> draws a line from the previous PLOT position, supporting arc drawing
* <code>CIRCLE*</code> draws a circle or oval, depending on screen mode.