Spinner Turn Count

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Revision as of 20:00, 4 September 2008 by Huygens (talk) (Data)
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Purpose

This is intended to be a page to keep track of the correct turns ratio of spinner/dial/paddle/trackball-controlled arcade games. Below is comma-separated text, hopefully this is a useful format.

Q: How do I use this information?

A: To tweak the analog sensitivity in MAME to better emulate real hardware.


An example from the first link below: Tempest, 72 count

if the control you use has 1200 counts per turn, the sensitivity calculation is: Sensitivity = 100 * 72 / 1200 = 6%


Links (Recommended Reading)

http://forum.arcadecontrols.com/index.php?topic=61381.0

http://forum.arcadecontrols.com/index.php?topic=23967.0

http://forum.arcadecontrols.com/index.php?topic=42401.msg474159#msg474159


Data

Effective_Tooth_Count = teeth that pass through the optical sensor per revolution of the knob (multiply by any gear ratios to obtain)

Counts_Per_Revolution = could be 1x, 2x, or 4x of the Effective_Tooth_Count (depends on original hardware interpretation of optical sensor information)

Other_Notes = quantitative information relating to game play (like degrees of turn from one side of the screen to another - useful for potentiometer games like Warlords)

Game Effective_Tooth_Count Counts_Per_Revolution Other_Notes
720 degrees 72 144
Ivan Ironman Offroad 154.286 Geared: 60 teeth on the steering wheel shaft, meshes with a 14 tooth gear on the encoder shaft, which has 36 teeth on its encoder wheel
Disks of Tron 128
Tron 128 From Manual - Same encoder disc part # as DOT
Blasteroids 72
Tempest 72 1 full turn moves 5 spaces on first screen
Pole Position 102 6/7 102 6/7 Geared: 60 tooth gear on wheel shaft, 14 tooth gear on 24 tooth encoder disk shaft => (60 / 14) * 24 = 102 6/7
Arkanoid 486 486 Geared: The knob attaches to shaft #1, which has a 72 tooth gear on it. That gear turns a 16 tooth gear on shaft #2. Shaft #2 also has a 72 tooth gear on it, which then turns a 16 tooth gear on shaft #3. Shaft #3 also has the encoder wheel on it, which has 24 teeth. 120-130 deg = one traversal across the screen
Revenge of DOH 486 972 Same spinner as Arkanoid
RoadBlasters 24 Limited Wheel/Yoke
Kick / Kickman 12 Ball-shaped roller.
Omega Race 64 64 Omega Race uses a 6-bit (64-position) rotary encoder
Super Speed Race 64 64 6-bit rotary encoder
Dark Planet 64 64 6-bit rotary encoder
Turbo 2 1/2 turns to go across the screen
Mad Planets
Aztarac
Both appear to use the same spinner (from manuals on arcarc)
Atari:
Sprint
Super Sprint
Championship Sprint
APB
Drag Race
Fire Truck
36 1/2 turn is 90 deg
Happ 2.25 inch trackball 149.2 (no wear) 2.25 inch ball, 0.362 inch roller, 24 tooth encoder disc
Happ 3 inch trackball 167.4 (no wear) 3 inch ball, 0.43 inch roller, 24 tooth encoder disc
Atari 4.5 inch trackball 330.6 (no wear) 4.5 inch ball, 0.49 inch roller, 36 tooth encoder wheel


Pot Based

Game Gear Ratio Other_Notes
Warlords 1 120-130 deg one traversal end to end of castle
Final Lap 2/3
Moto Frenzy 1
Breakout 1
Super Breakout 1 120-130 deg one traversal across the screen
Star Wars 15/7 (left/right) 30/7 (up/down) Yoke
Paperboy 30/7 (left/right) 30/7 (up/down) Yoke

Trackball Games: Game Name, Notes

Crystal Castles, 1st screen BB moves length of line above his head from center of trackball moved to one side

Centipede, 1 trackball move 1 end to other (stock tb) 2 1/2 mushroom lengths

Missle Command 1 full end to end visible trackball movement goes from left to the right of the little bump after the missile base