![]() When set to 0, then no centering is applied. The analog change being calculated the same way as Digital speed. This is the speed the analog value returns to center/rest when there is no button pressed during that frame. A special case of Speed = 0 gives 1Sensitivity analog change per button press.Ĭentering is used to simulate the auto-centering of a analog device when using digital buttons. Yes, this would definitely be the best way to do it if you have the equipment. If there arent any pulses then replace the optical transmitter/receiver pair on the board. Tempest, 720 Degrees, Super Sprint, Pole Position and Arkanoid. ![]() Millipede, World Class Bowling, Shuffleshot and Missile Command. eg Speed = 5 Sensitivity = 25% gives 5 0.25 = 1.25 analog change every frame. Try using a logic probe or an oscilloscope to see the pulses. The trackball games I play the most are. Arkanoid, and many others but I especially use it for super sprint racing game with the 6 and a quarter inch wheel. Made a 2 player control panel with a small 2 inch trackball and the ultimarc spintrak spinner. So you generally set the sensitivity to 100% unless you want fractional increments each frame. I bought this spinner for a small project I was working on. This is how many analog values to change every frame. ![]() 72/1200*100 = 6%ĭigital speed is used when you are using digital buttons to simulate the original analog control. Another example is using a 1200 (300 teeth * 4) count spinner to replace the 72 count spinner used in Tempest. When using a trackball with a mouse encoder, you generally set it to 25% because a mouse counts 4x then the original arcade hardware. 100% means every OS analog change is sent to MAME. "Sensitivity is the scale factor to apply to the analog value. I did some adjustment on sensitivity and found good values are around 40% for Tempest and 30% for Arkanoid.įYI: found some useful info on Mameworld's Forum about Analog input options: Tested both with lr-mame2003 and advmame: was recognized automatically and works fine. Made v2 of the spinner: changed the dial to get better connection with the flanged ball bearing and added a "cover" for the bearing (also 3D printed).
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