Using an LCD monitor with Naomi Marvel vs Capcom 2 ???

Pengo13

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Using an LCD monitor with Naomi Marvel vs Capcom 2 ???

How can I get this to work properly? Currently, the resolution does not display correctly in my lcd monitor. Aren't LCD monitors able to display 31K frequencies?

I'm a little lost....lol

Any help is appreciated.
 
an LCD computer monitor might not, might flash an OUT OF RANGE or something. I know TVs work just fine with NAOMI hardware however.
 
Computers output 31khz...

What do you mean by it "doesn't display correctly"? A picture tells a thousand words.

good call, I keep mixing the vertical refresh rates up.. since that's all your really change with computers heh. I need to go to sleep.

OP, verify that your dipswitches are set right for 31 KHz output and not 15 KHz. although in the very least, you should've got a double image if that happened. what Hewitson said, a picture would help.
 
Exactly....I thought that an LCD would work fine since it should handle 31khz. I get a picture but it does not look right. I've plugged the vga cable directly to the Naomi system, but that fails also (I get no picture in that scenario). I've set the dip switch to 31khz already.

See attached picture. Has anyone had any luck running this system with an LCD?

Computers output 31khz...

What do you mean by it "doesn't display correctly"? A picture tells a thousand words.
 

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I will try out an LCD TV that I have when I get home tonight....so you're saying that a TV with a VGA input will work?

I know TVs work just fine with NAOMI hardware however.
 
I will try out an LCD TV that I have when I get home tonight....so you're saying that a TV with a VGA input will work?

yeah, the RPTV went out on our 18 Wheeler, and just to prove a point I said "watch this" and it worked beautifully lol.

I don't know what to make of your situation here though. are you using the NAOMI VGA cable or the monitor one? I don't think that would make much of a difference, I actually had to use a NAOMI one with a computer in a pinch and it worked just fine lol.

so you're not running the Capcom I/O with this at all then or what? that adapter you linked me to makes sense now, if you're running that with JAMMA or something.
 
although in the very least, you should've got a double image if that happened.

Not for LCDs (and a lot of computer/digital CRT chassis actually). They'll notice the sync signals aren't coming in fast enough and error out.

Exactly....I thought that an LCD would work fine since it should handle 31khz. I get a picture but it does not look right. I've plugged the vga cable directly to the Naomi system, but that fails also (I get no picture in that scenario). I've set the dip switch to 31khz already.

See attached picture. Has anyone had any luck running this system with an LCD?

Ooh... bad news. That's what you get if you put 5Vp-p signals into a monitor expecting 1Vp-p. It usually damages the input circuitry of the monitor too, which may be why you're getting nothing when you plug it directly into the Naomi. Try a different monitor plugged directly into the Naomi.
 
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I've tried 2 different monitors and both have given me the same results. Are you saying that the LCD monitor needs to accept 5vp-p signals? I will have to look at the technical notes for the LCD monitors that I have. I was going to connect the Naomi hardware to my LCD TV, but now I'm afraid that it can damage the TV.



Not for LCDs (and a lot of computer/digital CRT chassis actually). They'll notice the sync signals aren't coming in fast enough and error out.



Ooh... bad news. That's what you get if you put 5Vp-p signals into a monitor expecting 1Vp-p. It usually damages the input circuitry of the monitor too, which may be why you're getting nothing when you plug it directly into the Naomi. Try a different monitor plugged directly into the Naomi.
 
Not for LCDs (and a lot of computer/digital CRT chassis actually). They'll notice the sync signals aren't coming in fast enough and error out.



Ooh... bad news. That's what you get if you put 5Vp-p signals into a monitor expecting 1Vp-p. It usually damages the input circuitry of the monitor too, which may be why you're getting nothing when you plug it directly into the Naomi. Try a different monitor plugged directly into the Naomi.

what does that mean? I've never heard of such terminology before.
 
How can I get this to work properly? Currently, the resolution does not display correctly in my lcd monitor. Aren't LCD monitors able to display 31K frequencies?

I'm a little lost....lol

Any help is appreciated.

I've had compatibility issues with LCD monitors and Naomi systems. Westinghouse
monitors appear to be incompatible. Not sure why though.

JD
 
UPDATE: I just tried my tiny 15" Dell and what do you know.....the fu#$%$# thing works like a charm.....go figure. Tried a 19" compaq and a 19" Viewsonic and neither one shows the picture properly.

What to do now? I guess that I need to find a 22 or 24" Dell LCD monitor somewhere....lol
 
what does that mean? I've never heard of such terminology before.

I'm probably just writing it different from you're used to because my brain works weird. Computer video signals are at a different voltage level than most arcade stuff. Computers use 0-0.7V or 0-1V while most arcade games are 0-5V. 5V will cook something expecting 1V.
 
I'm probably just writing it different from you're used to because my brain works weird. Computer video signals are at a different voltage level than most arcade stuff. Computers use 0-0.7V or 0-1V while most arcade games are 0-5V. 5V will cook something expecting 1V.

I wasn't aware the voltage was that high on arcade hardware. I swore if you metered the RGB it was something like .7V.

never really noticed I guess.
 
I wasn't aware the voltage was that high on arcade hardware. I swore if you metered the RGB it was something like .7V.

never really noticed I guess.

Metered or scoped? A DMM will take an average, and the color lines spend a lot of time low (front porch / back porch and the gaps around the vertical sync pulse) so seeing only a fraction of the actual signalling voltage is normal and expected. 0.7V average definitely isn't a 0-1V signal.
 
since you can get it to work in some scenarios, getting a cga/vga converter card from paradise arcade ($36) would give you more control settings for the signal going into the monitor.

but i have a rockola nibbler pcb that absolutely won't work on an LCD. gets the out of range type sync issues no matter what i try for the adjustments. had to run it on a CGA monitor.

when he said p-p, i presume you meant peak to peak, as in a sine wave peaks for AC?
 
since you can get it to work in some scenarios, getting a cga/vga converter card from paradise arcade ($36) would give you more control settings for the signal going into the monitor.

That's really, really not necessary for a Naomi... running off the built-in port in VGA mode will produce a much better picture with less lag.

when he said p-p, i presume you meant peak to peak, as in a sine wave peaks for AC?

Same basic concept, yeah. Video signals are referenced to a ground, so signalling voltage is written 0-X Vp-p, meaning 0 volts is black and X volts is 100% of that color. Most JAMMA-era and older arcade games run 0-5 Vp-p, while computers are mostly 0-0.7 or 0-1 Vp-p.
 
So is it really just hit or miss here? It's not like you can easily find the voltage specs on monitors.

What about a VGA-to-Component transcoder?

Why do manufacturers have to make everything so damn difficult. :mad:
 
I've tried probably 6 different lcd monitors with my naomi boards and I believe two of them worked.
 
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