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NAOMI/MAME Switching Cabinet (with pictures!!!)
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Locke141:
Sweet,

Looks good.
bimm25e:

--- Quote from: Brian74 on December 04, 2013, 01:15:34 pm ---I am trying to do the same thing with my silver strike bowling and target toss. I would be interested in learning more. Down the road I plan to add golden tee and my mame pc. Subscribed!

Sent from my SGH-M919 using Tapatalk 2

--- End quote ---

The CAPCOM I/O already being wired to my cabinet put me MILES ahead of just a standard JAMMA cab - it let me plug the PC's VGA output directly into the cabinet.  you would need something to convert the VGA signal to RGB if you don't have one and wanted to use a PC


if your goal is to switch between trackball PCB's you just need one of these -> http://www.ebay.com/itm/Jamma-Switcher-6-in-1-PCB-/291023786207?pt=UK_Video_Games_Coin_Operated_MJ&hash=item43c25e90df

I am pissed that these have gone from $100 to $150 in the last 2 months.... Guess I should have bought one in July :(


if you wire the trackball cables through the unused buttons for Player 2 you should be able to easily switch between the trackball PCB's and everything would work like a champ.  I did something very similar using lightgun PCBs instead of trackball, its the same idea ->http://forums.arcade-museum.com/showthread.php?t=271012
Brian74:
The cab didn't have a monitor, so I am using a tv. Vga to a cga adapter with s-video output. Both games run off its own pc, each pc has a I/O board. The controls have 5 wires and the trackball has 4 plus a hot and a ground. Using a kvm to switch video and audio right now.

Sent from my SGH-M919 using Tapatalk 2

JoeB:
Thank you for sharing this project.  It is something I was thinking of doing for a while (and actually spent significant $$ to complete, but eventually gave up).  I do have a question for you (see in bold below).  My personal experience in trying the same thing:

- My machine is a Sega New Astro City (much less space than your Woody)
- I managed to mount the MAME PC on an MDF board that slides into the NAC on a pre-existing metal rail ( PC uses JPAC + GroovyMAME to the 29" 15k CRT)
- I installed the Naomi on a separate board that output 31k to 15k via an Ultracade UVC (gives much better picture than running Naomi in interlaced 15k mode) - I used Velcro to mount into inside the machine
- The Naomi has NetDimm - the MAME PC was able to NetBoot games onto the Naomi
- This all fed to a 2 switchers - 1 for video, 1 for controls / sound

On paper it all looked great, and I got all the hardware / software setup and running.  The issues I ran into were:

- NAC is very tight for space! I had to open up the machine every time to switch (wasn't going to drill holes in fiberglass or metal)
- I ran into noise issues - JAMMA harness + VGA cables are very finicky when it comes to cable run lengths. I noticed ghosting / halo when using the switcher in Video (and clean video is my top priority) Have you noticed any video artifacts by passing video through the switcher rather than direct PCB to JAMMA?
- do you have any concern with the Naomi failure? I read somewhere that Naomi boards were know to fail when booting with no CRT attached (or something like that - I forgot the exact details) I assume you boot your PC first?

Ultimately, I gave up and instead I swap the PCBs as they are attached to sliding MDF.  When I want to MAME, I slide the MAME PC into the NAC and hook up (less than 30 seconds).  When I want to NAOMI, same thing (except now running CompactFlash adapter).
bimm25e:
I wanted to add pictures with my next post but I'll just double up


-I DO have the slightest amount of "noise" using the PC with Soft 15KHz, its totally negligible and only a real ---uvula--- would be looking hard enough to notice it.
  But the NAOMI input still looks perfect - no noise or artifacts like you mention.  I am using a Capcom I/O to interface to the cabinet - the KVM plugs directly into the Capcom I/O and I haven't noticed any video loss at all with this configuration. 


I did take care to route video and audio cables away from power lines - there are a couple spots where my hands were tied and there is a 1" proximity  but I got it as good as possible.  The KVM is connected to the NAOMI with a 6' VGA cable and it have a 6' lead going to the NAOMI and a 6' lead going to the PC so all-in-all its like a 12' VGA cable connecting the active device to the Capcom I/O.  I bought a secondhand KVM but it looks like it wasn't cheap when it was initially bought,  it switches the audio signal as well and I can say that I am an audiophile and I haven't noticed any audio degradation with my setup.
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