PC monitor on Daytona Arcade machine

[iainprice]

I have a twin Daytona machine but neither 50 inch rear projection screens work. Rather than buy new ones and find out the nardware is broken, I would like to get the machines up and running and refurbish them before buying screens.

I have RBG Synch BNC connectors. I have a cable that can convert to 15pin VGA BUT when I plug it to a PC screen, it is out of range. I think the daytona is putting out 15K and my monitor can't do that.

Is there an easy fix for Arcade to PAL TV or a simple scan doubler circuit using an AL250 etc?

Any comments, very welcome.

Thanks.

[NeWmAn]

Hi, I think Daytona needs a 25Khz monitor

[iainprice]

Does that mean simple solutions are out of the window 

[NeWmAn]

There was a thread about this problem:
http://nfggames.com/forum2/index.php?topic=2861.0

Do you have access to another arcade monitor? Most of those built in the '90s are 25Khz capable.

[Midori]

Do you have access to another arcade monitor? Most of those built in the '90s are 25Khz capable.

What makes you say that? Most monitors around here at least from the 90s are 15 KHz only. The arcade community in Sweden often has a real hard time to find good 25 KHz monitors except newer tri-sync ones but they have very high prices.

[NeWmAn]

Well too bad for Sweden then 

Probably I should have written "in the late 90's", but in the mid nineties every shithole over here had a Virtua Striker (1995) cab, and those used a 25" Hantarex  dual freq.

[NFG]

Medium res monitors (And I think these are distinct from older Atari 'medium res' monitors) are not very common anywhere.  While many shitholes may have had them, they probably brought them in specially.  I ran a shop with several arcade machines, and none of them were ever 25kHz capable as far as I know.

You can probably use an X68000 monitor, most of them were medium-res capable, though I think it was 24kHz, not 25...

[NeWmAn]

I haven't said that Medium res monitors are common, those were used only in a few dedicated cabs (paperboy,championship sprint, super sprint )
I have said that most monitors built in the late 90's are bi-frequency capable.

I ran a shop with several arcade machines, and none of them were ever 25kHz capable as far as I know.

Any decent arcade that I've seen had at least a few a SEGA model 1,2,3 games and those are all medium res games.

BTW. Lawrence, there's an small typo in the NEO GEO Joystick pinout: pin #4 and #9 are both listed as "D button" but only #4 is correct.

[Computolio]

     Most combo monitors could do 24 KHZ. Also see if you can track down one of those 12' color monitors that were used on early Macs- I believe those are fixed-frequency 24kHz monitors.

[blackevilweredragon]

     Most combo monitors could do 24 KHZ. Also see if you can track down one of those 12' color monitors that were used on early Macs- I believe those are fixed-frequency 24kHz monitors.

This is all I could fine.



My calculation by that many lines of resolution to the 60Hz does indeed yield about 24-25Hz, taking into account some possible overscan.