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Spinner resolution and Revenge of DOH

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Kremmit:

--- Quote from: RandyT on November 19, 2006, 08:07:33 am ---

Next question;

Who has an Arkanoid control with the original knob still on it?


What is the diameter?


Thanks,
RandyT

--- End quote ---

I'll see if I can't dig it out later tonight.

TPB:

--- Quote from: Kremmit on November 19, 2006, 11:46:59 pm ---
--- Quote from: RandyT on November 19, 2006, 08:07:33 am ---

Next question;

Who has an Arkanoid control with the original knob still on it?


What is the diameter?


Thanks,
RandyT

--- End quote ---

I'll see if I can't dig it out later tonight.

--- End quote ---

Was an answer for this established ??

I'm wondering how the knob diameter compares with the Big Blue or TokenTop knobs on Randy's TurboTwist 2 spinner.

FrizzleFried:
...with the recent discussion of SlickSlick's forum being closed,  I find the irony of this post popping up to be as thick as it comes.   I wonder if Christian has any opinions of the TT2 or the Token Knob now?

I too would like to know why DOH's speed doubled on an Arkanoid knob when switching between the two?

u_rebelscum:

--- Quote from: FrizzleFried on March 02, 2007, 09:52:46 am ---I too would like to know why DOH's speed doubled on an Arkanoid knob when switching between the two?

--- End quote ---

We've talked about this before on this forum, but to rehash:

The optical "sensor" produces a "Quadrature" signal.  The quadrature has four possible states for every move equal to one tooth-gap combo.  Arcade spinners (almost always) send the raw quadrature signal directly to arcade PCB.  Quadrature can be decoded at 1x, 2x or 4x per cycle (or per tooth).  The newer DOH PCB can decode at 4x, while the older Arkanoid PCB decodes at 2x.  Thus the "same" hardware can have different speeds.


FWIW, in very general terms, the very old arcade hardware could decode at 1x (atari football, pole position, etc), all the modern hardware decode at 4x (including PC mice), and 2x was the stepping stone.  The changes started in the early 80's with the then-new games at either 1x or 2x.  The late 80's to mid 90's saw 2x & 4x.

PC mice are different in that they decode the quadrature signal and send the decoded info to the PC.  Except for rarely usued protocols like BusMouse; IOW serial, PS/2, & USB decode in-mouse.  PS/2 & USB have always been 4x.  (I don't know about serial always being 4x, but I'm pretty sure it was.)

RandyT:

--- Quote from: u_rebelscum on March 02, 2007, 07:45:02 pm ---The newer DOH PCB can decode at 4x, while the older Arkanoid PCB decodes at 2x.

--- End quote ---

Wouldn't that be DOH at 2X and Arkanoid at 1X?


--- Quote ---PS/2 & USB have always been 4x.  (I don't know about serial always being 4x, but I'm pretty sure it was.)

--- End quote ---

This is not always a given across the axes.  With some "off the shelf" mouse controller chips, the Z is decoded at 2x, while X and Y are at 4x. 

RandyT

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