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If the joystick is self-centering at the midpoint, the value should be around 125 for both X and Y coordinates. All the Apple II series computers may be used such as IIe, IIc and IIGS. A small onboard LED confirms that power is available - colours may be green, red, blue or amber.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.