18 Oct
2015
18 Oct
'15
11:32 a.m.
OK, so it's sort-of computery. I snagged a JAMMA arcade board from a
recycling pile a couple of days ago (this is an m68k-based early 90's
board). Supposedly it's faulty, but I don't know the nature of the fault -
maybe it's just RAM or a reset problem or something, so I figured I'd put a
little bit of time into it.
Anyway, I'm having a hard time finding details about the video output - I
know it's negative composite sync (I got the manual, which says that much),
and I *think* it's TTL levels (right?), but I'm not sure about frequencies.
Then there's the RGB outputs - analog, but I'm not seeing anything that
tells me peak voltages.
I suppose the question is, what's the easiest display to try and hook this
up to? I've monitors with an assortment of inputs (VGA, EGA, CGA, MDA,
mono-composite), and I think there's a CRT TV kicking around that has a
composite input too (and maybe S-video, not sure). It doesn't bother me if
the quality's not great; I'm just interested in whatever's quickest to
interface to at this stage, just to see if I can get something working.
cheers
Jules
18 Oct
18 Oct
11:41 a.m.
Google "Super-Gun", as that's how you typically hook one up outside of an
arcade cabinet. I think most arcade cabinets use CGA monitors.
BTW, it looks like Component video has made its way to Super-Guns (I was at the
"Portland Retro Game Expo" yesterday).
If nothing else, you'll need a JAMMA harness so you can wire something up yourself.
What board? There are sites out on the net with repair logs for some boards.
Zane
On Oct 18, 2015, at 8:32 AM, Jules Richardson <jules.richardson99 at gmail.com>
wrote:
OK, so it's sort-of computery. I snagged a JAMMA arcade board from a recycling pile a
couple of days ago (this is an m68k-based early 90's board). Supposedly it's
faulty, but I don't know the nature of the fault - maybe it's just RAM or a reset
problem or something, so I figured I'd put a little bit of time into it.
Anyway, I'm having a hard time finding details about the video output - I know
it's negative composite sync (I got the manual, which says that much), and I *think*
it's TTL levels (right?), but I'm not sure about frequencies. Then there's the
RGB outputs - analog, but I'm not seeing anything that tells me peak voltages.
I suppose the question is, what's the easiest display to try and hook this up to?
I've monitors with an assortment of inputs (VGA, EGA, CGA, MDA, mono-composite), and I
think there's a CRT TV kicking around that has a composite input too (and maybe
S-video, not sure). It doesn't bother me if the quality's not great; I'm just
interested in whatever's quickest to interface to at this stage, just to see if I can
get something working.
cheers
Jules
12:20 p.m.
On 10/18/2015 10:41 AM, Zane Healy wrote:
Google "Super-Gun", as that's how you
typically hook one up outside of
an arcade cabinet.
Ah, totally overkill at this stage, though.
I think most arcade cabinets use CGA monitors.
My guess is that it's most likely all TV-rate signaling, and so there might
be a way of just throwing a handful of resistors into a pot (etc.) and
getting a (poor-quality, perhaps!) signal out the other end that I can just
feed into one of the displays that I have here.
The JAMMA pinouts are readily available, so wiring for the controls isn't a
problem - I'm just not finding anything that provides details about the
video signal.
If nothing else, you'll need a JAMMA harness so
you can wire something
up yourself.
I've actually got some suitable edge connectors sitting in the junk pile (I
don't have a 56-pin one, but a couple of butchered shorter ones
side-by-side will do for testing). The manual that I obtained with the
board lists the DIP switch settings for free play mode, so I don't think I
need to worry about simulating coin boxes either (although I think those
are just TTL inputs, so a couple of debounced switches would do).
What board? There are sites out on the net with
repair logs for some
boards.
It came from an Aero Fighters cab - board says "IT-19-02" in the corner.
I've no idea if it was a one-off for this game or if other games used the
same board with different firmware.
cheers
Jules
12:48 p.m.
On Oct 18, 2015, at 9:20 AM, Jules Richardson <jules.richardson99 at gmail.com>
wrote:
It came from an Aero Fighters cab - board says
"IT-19-02" in the corner. I've no idea if it was a one-off for this game or
if other games used the same board with different firmware.
If you can get it working, it should be a fun game! I love Aero Fighters 2 & 3 (aka
Sonic Wings) on the Neo Geo.
Looks like this page might have some details to help.
Zane
6:16 p.m.
On 10/18/2015 11:48 AM, Zane Healy wrote:
On Oct 18, 2015, at 9:20 AM, Jules Richardson <jules.richardson99 at gmail.com>
wrote:
Linky not appearing :-(
I just hooked the board up to a PSU and a speaker, and it makes promising
tuneful noises (at ear-bleeding volume*) - so it seems like basic CPU, RAM
and ROM are there at least.
* I've no idea what the original impedance would have been, or how many a
typical cab had (more than one?).
cheers
Jules
It came from an Aero Fighters cab - board says
"IT-19-02" in the corner. I've no idea if it was a one-off for this game or
if other games used the same board with different firmware.
If you can get it working, it should be a fun game! I love Aero Fighters 2 & 3 (aka
Sonic Wings) on the Neo Geo.
Looks like this page might have some details to help.
7:12 p.m.
On Oct 18, 2015, at 3:16 PM, Jules Richardson <jules.richardson99 at gmail.com>
wrote:
On 10/18/2015 11:48 AM, Zane Healy wrote:
If you get that far, then it may have been a monitor problem, rather than a board problem.
Or the board problem is in the video circuitry.
Here is the link I meant to send.
http://hacks.slashdirt.org/hw/supergun/
Even now typical cabinets only have one JAMMA board.
I've been researching a project I'm getting ready to start in on. I want to make
some custom arcade controllers as I love the old 8-bit game systems, but the old
controllers are *painfully* bad. As a result I've come across these things on a few
pages. You can find them cheaper on eBay. It looks like they do what you want.
http://www.focusattack.com/gonbes-gbs-8220-v3-cga-ega-yuv-to-vga-arcade-hd-…
Right now I'm stuck on figuring out the best option for housing my controller. The
first will be a simple Atari joystick replacement that replaces the joystick with 4 Happ
arcade buttons and two fire buttons (so it can be used for either Atari 2600 or 7800.
That's child's play, a good housing isn't.
Zane
On Oct 18, 2015, at 9:20 AM, Jules Richardson <jules.richardson99 at gmail.com>
wrote:
Linky not appearing :-(
I just hooked the board up to a PSU and a speaker, and it makes promising tuneful noises
(at ear-bleeding volume*) - so it seems like basic CPU, RAM and ROM are there at least.
* I've no idea what the original impedance would have been, or how many a typical cab
had (more than one?). It came from an Aero Fighters cab - board says
"IT-19-02" in the corner. I've no idea if it was a one-off for this game or
if other games used the same board with different firmware.
If you can get it working, it should be a fun game! I love Aero Fighters 2 & 3 (aka
Sonic Wings) on the Neo Geo.
Looks like this page might have some details to help. 
7:32 p.m.
On 10/18/2015 5:12 PM, Zane Healy wrote:
On Oct 18, 2015, at 3:16 PM, Jules Richardson
<jules.richardson99 at gmail.com> wrote:
If you can make a copy of the roms. If you find a FPGA clone board
of the game, you still need roms.
Ben.
On 10/18/2015 11:48 AM, Zane Healy wrote:
If you get that far, then it may have been a monitor problem, rather
than a board problem. Or the board problem is in the video
circuitry.
Here is the link I meant to send.
http://hacks.slashdirt.org/hw/supergun/
Even now typical cabinets only have one JAMMA board.
I've been researching a project I'm getting ready to start in on. I
want to make some custom arcade controllers as I love the old 8-bit
game systems, but the old controllers are *painfully* bad. As a
result I've come across these things on a few pages. You can find
them cheaper on eBay. It looks like they do what you want.
http://www.focusattack.com/gonbes-gbs-8220-v3-cga-ega-yuv-to-vga-arcade-hd-…
Right now I'm stuck on figuring out the best option for housing my
controller. The first will be a simple Atari joystick replacement
that replaces the joystick with 4 Happ arcade buttons and two fire
buttons (so it can be used for either Atari 2600 or 7800. That's
child's play, a good housing isn't.
Zane
On Oct 18, 2015, at 9:20 AM, Jules Richardson
<jules.richardson99 at gmail.com> wrote:
Linky not appearing :-(
I just hooked the board up to a PSU and a speaker, and it makes
promising tuneful noises (at ear-bleeding volume*) - so it seems
like basic CPU, RAM and ROM are there at least.
* I've no idea what the original impedance would have been, or how
many a typical cab had (more than one?). It came from an Aero Fighters cab - board says
"IT-19-02" in
the corner. I've no idea if it was a one-off for this game or
if other games used the same board with different firmware.
If you can get it working, it should be a fun game! I love Aero
Fighters 2 & 3 (aka Sonic Wings) on the Neo Geo.
Looks like this page might have some details to help.
3234
days inactive
3234
days old
6 comments
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participants (3)
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bfranchuk＠jetnet.ab.ca -
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jules.richardson99＠gmail.com