Mame install HELP!!

[strykr]

Im at my wits end with this one, hoping someone clever can help!

im trying to install mame in a cab, never really had any problems before, but im pulling my hair out on this one....

i tried soft 15khz and didnt get anything.. so installed calamitys drivers catalyst 9.3 and it found 109 video modes.

However when I boot windows is warped to all hell and split into 4 horizontal iterations of windows....

I had windows set to 640 x 480 and thought this may be the problem so switched it to a lower resolution and the problem still persists.

I get the orange light on the jpac, it looks like its slightly blinking but not 100 percent sure.

and the sync light, pulses randomly on and off.

IF anyone has any bright ideas please help. What am i missing? Or is it possible that this DEll just wonr have it. I have heard someone say certain dells lockout video modes?

Gear:

wells gardner 19k7901 (working)

Dell Optiplex

Ati Radeon HD4350 (known working)

Jpac (known worker) with only the jumper on 15khz

PS2 to usb adapter (known working)

Working male to female vga cable into DVI adapter (known working from another cab)

Cheers

strykr2020-01-10 23:32:44

 

[yoganuggy]

Check the jumpers on the jpac that they are set to 15khz and not 31khz.

Try tune the sync pots on the monitor remote board.

If you plug the VGA cable into the pc monitor does it display anything? It shouldn't if it's outputting correctly at 15khz.

What OS are you running?

 

[strykr]

Check the jumpers on the jpac that they are set to 15khz and not 31khz.

Try tune the sync pots on the monitor remote board.

If you plug the VGA cable into the pc monitor does it display anything? It shouldn't if it's outputting correctly at 15khz.

What OS are you running?

Hi yoga, jumpers in the right place, its ot a monitor pot issue, pc monitor doesnt display anything.

It doesnt display anything on either actually vga or dvi. Which is incorrect. Im beginning to think this little dell just wont have it.

Uninstalled the lot and tried soft 15khz as well. Same results.

And im running xp. Dx and .net are fine. strykr2020-01-11 17:29:58

 

[ZedEx48K]

Have you tried bypassing the jpac altogether? A PC set correctly to 15khz (be it 320 or 640 interlaced) should display fine with RGB and sync sent from a VGA connection.

 

[strykr]

Havent tried that. Do you mean cut a vga cable.and feed it directly into the monitor?

 

[strykr]

I noticed the max res for that monitor is 600 x 200 that wasnt an option in quickres. I tried a bit lower and still got the same problem

 

[ZedEx48K]

You can create custom resolutions, in windows and I think with the 15khz
software, whenever I have done the wiring I have done it to scart, but
the principle is the same as you know, similar to this.

ZedEx48K2020-01-11 20:19:00

 

[JonnyG]

Try adding jumper to the 31khz pins on the JPac as well as the 15khz. That's how mine is set to output to a 15khz Hantarex with a bios flashed Radeon.

 

[keptboy]

Hi I have had this problem before and was sorted by one of the below ways which you can check
Set screen size to 640x480
Use a scart lead that’s right they are sold on eBay for about £22
Try another CRT monitor
I could not sync my monitor once and gunblade told me that one of the pots on the chassis was not working correctly and I changed it and it was perfect then
Good luck

 

[sttic]

native non-interlaced 4:3 resolution of 15khz CGA is 320x240.

 

[strykr]

Thanks for the suggestions everyone. Will give it some thought.

I havent another monitor to swap in. The monitor is fine with pcbs. I will try the extra jumper suggestion.

I bought a little hp compaq on ebay for 20 quid so will try that first. Shouldnt take too long. At least that way i will have a known working everything as it will be identical to the setup in my NAC.

This dell is the first pc ive ever tried that only seems to show one adapter in soft 15khz. And first time ive installed soft 15 or crt emudriver it and its buggered up the vga, dvi and hdmi sockets...

320 x 240 wasnt an option in quickres. There were loads of possibles and some resolutions very close to that. If none of that works ill knock up that cable zedex suggested.

 

[sttic]

Oh meant to say 320x200 sorry, but CGA is a computer standard anyway arcade monitors don't really have standard resolutions. It's the monitors' high-voltage section that limits the number of dots per line it can do and it's up to the video output to provide hsync for period of time for it to know when to stop firing the guns and when to wait for the beam to wrap around.

edit: If you have a digital oscilloscope you could probe the sync pins to verify what the PC is actually giving out and does it fall in the limits.

sttic2020-01-12 19:11:15