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JAMMA2PC
penjuin:
See, i dont have a jamma cabinet, and i kind of made it my goal to connect a jamma card to a pc. it is rather confusing to build a jamma cabinet, and i would get a lot beter boasting rights ;).
My idea is to build a harness with an rgb->vga connector and a speaker plug for the speaker inputs, and using a parrallel port and transistor combo to stimulate button presses.
Thenasty:
--- Quote from: penjuin on January 25, 2005, 07:22:46 pm ---My idea is to build a harness with an rgb->vga connector and a speaker plug for the speaker inputs, and using a parrallel port and transistor combo to stimulate button presses.
--- End quote ---
This is where you confuse me. Whats the point of doing all that ?
Why not just use a TV or Arcade Monitor and build a small Control Panel, put the joysticks and buttons in, plug it in and your set.
RayB:
Penjuin, the part you're not getting is that a JAMMA game board is like a complete self-contained computer. It has sound output, video output, etc. Like a computer, it needs a power supply. It also needs controls, which are interfaced to it via the JAMMA harness (harness is just a connector with wires going out to all the controls, the power supply, the monitor, etc).
So, you see, what you're describing is connecting one kind of "computer" to another computer. And the answer is, you can't do it.
You can output the video to your PC monitor, yes, but an RGB to VGA converter is expensive. And connecting a keyboard to a JAMMA board? Can't do it.
If it HAS to run on your PC then use MAME!
penjuin:
ok.
I understand that a jamma board is a self contained computer, and obviously a pc is a self contained computer. the sole reason for doing this is bragging rights, so im not gonna get too involved. the thing is, i am stimulating a network environment. that is, i can connect a mac to a pc, if i can get them to talk the same language.
imagine that my computer is like a network server and the jamma card is like a laptop with a usb external parrallel port. My server has a monitor and a parrallel port and a control panel.
imagine that my parrallel cable (one strand) were to join up with a base of a transistor, with the collector being ground, and the emitter being, say, 1P button one. when a pulse of electricity goes down one of the wires in the cable (the one that is linked to the player 1 transistor) it hits the base of the transistor and allows electricity to flow through, connecting the collector with the emmiter, just like pressing a microswitch, and activating a buttonpress, therefore telling the jamma board that player one's button was pressed. this action can be mimic for all buttons and joysticks. I can write software in visual basic to do this thing when you press [insert what player one button one keystroke generates]. then after connecting all of that, several ways exist of getting the right power to it, ie molex, gameport or even standalone. then the rgb adapter could be plugged into a tv, tv card or monitor. same with the sound. this could all be done on a pcb and hooked up to a jamma harness, making the pc appear the the jamma card as just a harness, yet it would be so much more powerful and configurable.
jamma pin out {http://www.coin.demon.co.uk/jamma.htm}
If anything is not understood then i will elaborate
Mameotron:
Uhhh...
Ok, if you want bragging rights, knock yourself out.
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