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OpenJamma board - interest?

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CraftyMech:

--- Quote from: Rigby on July 30, 2013, 03:55:20 pm ---
--- Quote from: CraftyMech on July 30, 2013, 02:56:55 pm ---The 60-in-1 board actually uses an ARM processor, running an old version of MAME.

--- End quote ---

Really?  Mine has an Intel PXA255 and an Altera MAX II.  Are you speaking of another chip I'm not seeing or do I have a different version?

--- End quote ---

The PXA255 is a 5th generation ARM processor, which may be branded as "Marvell" or "Intel". Intel sold the assets for the PXA to Marvell a few years back. The chip has the markings "C200" which classifies it as the 200MHZ version.

The Altera Max II is a CPLD, not an FPGA. CPLDs typically have far fewer gates ("course grain") and are not intended for large digital designs.

Rigby:
I am corrected.

CraftyMech:
With regards to the FPGA approach, I think the issue when you are talking about a lot of games is the complexity and magnitude of that undertaking. JROK spent considerable time reverse engineering the Williams platform, and tweaking the design of his Multi-Williams board to get the game timing as close to the original as possible. Imagine the effort to implement just the set of games on the 60-in-1 for example, where you have a variety of platforms: Stern, Midway, Capcom, Nintendo, etc.. If you focused on one system, such as Capcom CPS-1, you would have more bang for the buck, but there is no way an FPGA implementation will ever touch the size of library that a basic MAME setup is capable of running, and emulating quite well.

Rigby:

--- Quote from: CraftyMech on July 30, 2013, 05:42:03 pm ---With regards to the FPGA approach, I think the issue when you are talking about a lot of games is the complexity and magnitude of that undertaking. JROK spent considerable time reverse engineering the Williams platform, and tweaking the design of his Multi-Williams board to get the game timing as close to the original as possible. Imagine the effort to implement just the set of games on the 60-in-1 for example, where you have a variety of platforms: Stern, Midway, Capcom, Nintendo, etc.. If you focused on one system, such as Capcom CPS-1, you would have more bang for the buck, but there is no way an FPGA implementation will ever touch the size of library that a basic MAME setup is capable of running, and emulating quite well.

--- End quote ---

I agree; it would be an incredible undertaking, indeed, but I don't think it would be impossible.  Many games share components, such as the Z80, for example.  I also don't really think that one would want to put all of mame on a single board; I question the legitimacy of ideas to put hundreds or thousands of games on a single cabinet.  I'd be happy with about 8 vertical games on one board, as I don't really enjoy more than about 8 of them.

I favor the FPGA idea so much for a couple reasons: A) it's fascinating to me to think that you can re-implement the old hardware on a chip.  B) there is 0 frame latency; it's the same as playing on actual hardware; no emulation.

I'm talking too much, again.

opt2not:
Finally had a chance to catch up on this thread. shanghaiguide, you really got a good one here!  All the personalities showed up for this...driverman, Xiaou2, sandheaver... entertaining! :lol

I just signed up for the newsletter, and like I told you in PM, I'd be really interested in picking up one or two of these. Hopefully development is going well.

This might have been discussed earlier (i might have skipped past it), but what are the physical dimensions of the board? Will it be enclosed in a case?

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