Sega-Naomi

I often see discussions regarding the monitor specs.



Can someone briefly explain the difference between 15/24/31K monitors?



Will certain game systems only work on one type of monitor resolution, or does it just make the picutre better?



For example, I believe that my cabinet has a 31K monitor (it's a Uni cab).



If I got a JVS to JAMMA adapter (looking for one BTW), so that I could play JAMMA games (CPS2, CPS3, Atomiswave, whatever), will they work with a 31K monitor?



What kind of games utilize a 15K or 24K monitor?



Thanks for your time.



Steve

The simplest way to think of this is that different games run at different resolutions. If you look at monitors in general, they all have a set of resolutions that they can and cannot display.



Arcade monitors are basically the same way but with less resolutions available. A 15k res game will not display on a 24k monitor because the timings and resolutions are not compatible.



As for if one looks better or not is mostly a matter of opinion. For example, DOA2 can run in either 15k or 31k, but it looks sharper/better overall on 31k. However, SF3 doesn't benefit from 31k at all because the manufacturer did not supply the higher res artwork. In this case, everything looks more blocky because the image is 'scaled', which degrades the picture. The same principle applies if you use a converter to run a 15k jamma game 'scaled' on a 31k monitor.



Sorry for the long explanation, but one or two sentences would not be enough to properly/fully explain this. :smt024 :smt023

No need to apologize, I was hoping for a lengthy explanation.



As a follow up, as it relates to a question in my first post, does that mean that there are some JAMMA games that I won't be able to play on my Uni cab, because the resolutions won't be the same?



What about the dipswitches on the Naomi/Naomi 2 mobo - doesn't one (or some of them) have something to do with resolution?



Sorry, I'd just hate to put some money into hardware/software at some point, and not be able to use it with this cab.



Thanks,

Steve

Okay, so I'm assuming (perhaps incorrectly) that the monitor in the Uni cab is 31K.



Assuming that is correct, I looked up Virtua Fighter 4 Evolution on KLOV.com, and it has it listed under Medium resolution (which they define as 25K.)



If that's correct, and it's a 25K game, why would it look perfectly fine on a 31K monitor?



Again, I appreciate the info, I'm just trying to get a better understanding.



Thanks!

Most of the monitor specs on KLOV are incorrect. Naomi is either 15k or 31k. Don't use them as a concrete source on this subject. :smt018

Your Naomi cab should have a tri sync monitor in it, so it should work for all the games (check the monitor model to be sure) in general games at 15k will look best on a dedicated 15k monitor though.



The limiting factor may just be JVS vs Jamma since the Naomi cab is native JVS, you'll need a converter to play Jamma games and they seem to be rare.



If you play a 2-D game on your Naomi on your Naomi cab, best to switch the first jumper on the mobo so you are at 15k output. (can someone confirm that this would give the best picture on a tri-sync monitor? I'm assuming here, I have never tried it)

joshua3dg wrote:Most of the monitor specs on KLOV are incorrect. Naomi is either 15k or 31k. Don't use them as a concrete source on this subject. :smt018

LOL - okay; that's why I'm asking.

Does anyone know how I can be sure what resolution my monitor is?



I took the back off and looked, but saw nothing that said one way or the other.



It's a Toshiba 29" monitor with a NANAO chassis/monitor board.



Thanks.

You got a Toshiba in there? Wow! Lucky bastard! Standard Uni's are always 31K (640x480). The odds are low you got a tri-sync in there.

I have a toshiba tube with nanao, 31k only - so no guarantees (http://kirurg.org/drop/2932-sticker.jpg)



31k means 31khz, meaning the beam scans horizontally across the screen 31500 times pr second. With a framerate of 60 screen pr second, which is the norm (60hz) - you get 31500/60=525 lines pr frame.



15k games is about half this, i.e only scans across the screen about 15000 times pr second, resulting in half the vertical resolution.



Mismatch between game and monitor is a no go, as the monitor wont be able to process the information.