Standard res on Med res monitor

[phatmeat]

Stupid question  . But will a standard res game ( Shinobi : PCB) work on a med res monitor ? (wells Gardner WG33K301)  . What it is doing is a double image on the horizontal.. Works good with a PC.. If pics are needed I will post ..

[Ken Layton]

NO.

What you need is either a standard res only monitor, a dual res (medium-standard) monitor, or a multi-sync monitor.

[phatmeat]

Thanks for the reply.. Did not like it ,but thats my life.  Any work arounds ?

[Jack Burton]

There is the possiblity of an upscaler existing for this purpose, but it would probably be easier to just use MAME.  It would also probably give you a lot more flexibility on the type of upscaling performed.

[phatmeat]

Its a bummer .. I bought a Shinobi board to just make it a huge stand alone.. I have a Dynamo pedestal cabinet

[Jack Burton]

well there is always the option of changing the chassis of your monitor to a 15 khz one.  This should be cheaper than buying a whole new monitor.

have a look here: http://www.jomac.net.au/parts.htm

Alternatively you could buy a 32" tv and decase it and use it for your monitor.  When combined with a RGB to S-video or Component converter it can have a very nice result.

[maiki]

Can I have a question regarding this 15 kHz - 25 kHz - 31.5 kHz issue? I don't get one thing. If the CRT screen is designed to display 31,5 kHz, its "real" resolution should then be higher than that of a standard 15 kHz CRT screen. Or am I missing something here? Speaking about that, if you take a multisync CRT like Wells Gardner 9200 or 9500, you will get optimized picture only for ONE standart depending on the real resolution of the CRT screen... I mean it should depend on how precize is that "grid" in the screen... the PC CRT monitors also have different "resolutions" - some of them will show 240 scanlines too precize the others (older ones) will show them as 15 kHz arcade monitors.... so is Wells Gardner 9200 a simple standard 15 kHz CRT screen (with that resolution) that is capable of displaying 480 active scanlines, but not as sharp as the real 480p CRT display or where is the definiton here....

You know, if the monitor is capable of higher than 15 kHz then it should mean that 15 kHz will not look that authentic on it....

just my thoughts...

[lilshawn]

the only reason a monitor displays 15 or 25 or 33k is because of the electronics involved.

multisync monitors simply do all the "conversion" for you....

you will notice in monitors that use the same chassis, example the k7400 / k7500 series from wells, use the same chassis, but changed a few of the capacitors and resistors to make it 15k (k7400) or 25k (k7500)

it really has nothing to do with the tube or anything, it's just different scan rates.

I caution you to avoid using terms meant for television and terms meant for computer monitors as often they are not interchangeable / applicable to arcade monitors. "optimized resolution" or "native" really only applies to LCD screens not to CRT screens.

you could go ahead and count the individual lines of pixels on your tube and adjust your chassis to scan exactly that many times, but because of the nature of video signals, you would be wasting your time, since there are wide fluxuations regarding "standardized" video signals. and that is why there is a vertical size/hold adjustments. when you adjust the picture a little shorter, what your actually doing is changing the scan rate so takes less time to complete. the position on the screen is determined on which clock tick to start on.

in conclusion since i forgot what we where talking about, the "grid" you are refering to is the shadow mask or the aperture grill... is what is controlling the alignment of the colors...All three beams pass through the same holes in the mask, but the angle of approach is different for each gun. The spacing of the holes, the spacing of the phosphors, and the placement of the guns is arranged so that for example the blue gun only has an unobstructed path to blue phosphors.

what you may be thinking about is dot pitch. dot pitch measurements do not apply to aperture grille displays.

[maiki]

aha, thanks...

so it really does not matter then.. it's still the same screen... at least I know that those CRT EDTVs are basically standard TVs...

[Jack Burton]

You were sort of on the right track.

The dot pitch of most arcade monitors are going to be quite coarse, mostly like an SDTV. 

This means that the 650x480 31khz image that you see on a 31khz arcade monitor will not be quite as sharp as the same image sent to a pc monitor.  I think usually the dot pitches on arcade monitors are .6-.8 mm, and the pitch on a pc monitor will be .24 - .31 mm.

However, this does not mean much in the long run.  The image you see of a 31khz game on an arcade monitor will not be blurry or lacking detail in any way, it will merely seem a little "softer", and you may even prefer the heavyness of each line of color.  Certainly the scanlines will not be as noticeable as they are on a finer pitch display.

15 khz games on a monitor with a high dot pitch can look just fine too.  Depending on the sizing of the monitor and your distance from it they can be some of the best looking displays you've ever seen.

However, 15khz on a super fine pitch screen can look sort of bad sometimes too.  The scanlines appear very heavy, and can be distracting when you are close to screen. 

Aperature grill displays do not have a dot pitch, but they do have a stripe pitch, and the above statements are basically exactly the same based on that value.