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Marble Madness trackball settings in MAME
mimic:
I'm looking at this page: http://wiki.arcadecontrols.com/wiki/Spinner_Turn_Count and can't figure out how to calculate this correctly is it:
100x24x4/167.4 = 57
or
100x24/167.4x4 = ~4
or
100x167.4/24x4 = ~174??
Why can't they provide more examples, so it's easier to just replace the numbers, they just picked one that is easiest to calculate anyway!
PL1:
--- Quote from: mimic on June 14, 2015, 12:36:06 am ---I'm looking at this page: http://wiki.arcadecontrols.com/wiki/Spinner_Turn_Count and can't figure out how to calculate this correctly is it:
100x24x4/167.4 = 57
or
100x24/167.4x4 = ~4
or
100x167.4/24x4 = ~174??
Why can't they provide more examples, so it's easier to just replace the numbers, they just picked one that is easiest to calculate anyway!
--- End quote ---
If you'd like to update the new wiki page at http://newwiki.arcadecontrols.com/index.php?title=Spinner_Turn_Count with an example, I'd be appy to help. ;D
It might be easier to test/verify which version of the formula is accurate using Crystal Castles.
--- Quote ---Crystal Castles, 1st screen BB moves length of line above his head from center of trackball moved to one side
--- End quote ---
The wiki says to use a 2x multiplier for Crystal Castles instead of the 4x for Marble Madness.
100x24x2/167.4 = ~29
or
100x24/167.4x2 = ~7
or
100x167.4/24x2 = ~349
There is one other note on the wiki that might be relevant.
--- Quote ---Atari LETA Chip: several of Atari's optical-control games used the LETA quadrature-decoder chip. It could be set to a 2x or 4x resolution. Therefore all of the below games are either 2x or 4x.
. . .
Marble Madness
Crystal Castles
. . .
--- End quote ---
Based on the wiki, one of those six settings should work for Crystal Castles and one should work for Marble Madness: :dunno
(4x settings)
57
4
174
(2x settings)
29
7
349
If someone with a 3" Happ trackball (0.43 inch roller, 24 tooth encoder disc) could test these settings, it would be greatly appreciated. :cheers:
Scott
mimic:
--- Quote from: PL1 on June 14, 2015, 11:20:13 am ---
100x167.4/24x2 = ~349
--- End quote ---
That setting can't be right since sensitivity settings only go up to 255. So that just zapped that formula
it is 100 x effective tooth count / resolution, right?
100x24x4/167.4 = 57
The problem is Marble Madness plays like crap with that setting, with the higher one was much much better.
Then again I have never played Marble Madness and have no idea how it supposed to feel. It seems as I'm making a lot of spinning with the trackball at 57 setting.
EDIT: I don't understand how people are playing with trackballs/spinners on their machines? I hardly see questions about it. Either everyone just understands that wiki page and I am the only dope or no one cares to play properly?
PL1:
Have you tried Crystal Castles?
The "BB moves length of line above his head from center of trackball moved to one side" note should provide a fairly accurate picture of which setting/formula is correct.
--- Quote from: mimic on June 14, 2015, 12:19:28 pm ---I don't understand how people are playing with trackballs/spinners on their machines? I hardly see questions about it. Either everyone just understands that wiki page and I am the only dope or no one cares to play properly?
--- End quote ---
They are probably just tweaking the settings until it "feels right" so they don't have to ask. :embarassed: :lol
The wiki could definitely use some clarification in the trackball section, but Marble Madness may not be the best game to verify the correct formulas/settings.
Scott
welash:
--- Quote from: mimic on June 14, 2015, 12:19:28 pm ---
it is 100 x effective tooth count / resolution, right?
--- End quote ---
Isn't it 100 x resolution of original / resolution of your trackball ?
So if you are playing with the same trackball, it would be 100, and if you were playing with 2.5 inch happ it would be
100 x 167.4/149.2
The resolution stated is a calculation of (D/d) * C where D is the diameter of the trackball, d the diameter of the roller and C is the count of teeth. so (3/0.43)*24 is 167.4
That being said, as I remeber from the arcade, you really had to spin the trackball fast in Marble Madness, so maybe your 57 is correct.