too much horizontal size

[Ibaroh]

Hello everyone,

I changed my GroovyMame setup from a Pal TV to a Wells Gardner D9800 arcade monitor.

Most thinks are fine, but the horizontal size at some low resolutions is to much.

Games Like Dodonpachi fit perfect, but on other games like Battle Garegga with a quite similar resolution around 50 Pixels are missing.

The horizontal size setting on the monitor is already at the minimum.

Did I something wrong or is it because the limitation of the Monitor? What could I do against that?

Sorry for my english. I made a illustration for better understanding.

[Calamity]

Hi Ibaroh,

What video card & drivers are you using? Post a log for ddonpach and another one for bgaregga.

[Ibaroh]

Hi Calamity,

It's a Radeon 4850 with the CRT Emudriver 1.2b (Catalyst 9.3)  for XP-64

enclosed the logfiles

[Calamity]

Try using 8BitMonk's guide:

http://forum.arcadecontrols.com/index.php/topic,117489.msg1477621.html#msg1477621

(it's for the Betson-Kortek but it looks like they're basically the same monitor).

[Ibaroh]

Thank you. I changed the crt_range lines like in the guide but unfortunately it is taking no influence to the horizontal size.

[Calamity]

You don't have to change the crt_range lines. Use the d9800 preset and leave everything as auto. The purpose of the guide is to describe a method to use the adjustments in your monitor's osd to calibrate the ranges properly.

[Ibaroh]

The Problem is that the OSD offers not enough range to adjust a reasonable horizontal Size.

[adder]

The horizontal size setting on the monitor is already at the minimum.

does your monitor have a horizontal width coil on the main chassis, have you adjusted that?
http://www.arcaderepairtips.com/2010/04/21/adjusting-the-horizontal-width-coil/

[Calamity]

The Problem is that the OSD offers not enough range to adjust a reasonable horizontal Size.

Ok, I had missed this part. So, setup mame.ini to use "monitor custom" and re-add these lines:

      crt_range0  15250-18000, 40-80, 2.187, 4.688, 6.719, 0.190, 0.191, 1.018, 0, 0, 192, 288, 448, 576
      crt_range1  18001-19000, 40-80, 2.187, 4.688, 6.719, 0.140, 0.191, 0.950, 0, 0, 280, 320, 0, 0
      crt_range2  20501-29000, 40-80, 2.910, 3.000, 4.440, 0.451, 0.164, 1.048, 0, 0, 320, 384, 0, 0
      crt_range3  29001-32000, 40-80, 0.636, 3.813, 1.906, 0.318, 0.064, 1.048, 0, 0, 384, 480, 0, 0
      crt_range4  32001-34000, 40-80, 0.636, 3.813, 1.906, 0.020, 0.106, 0.607, 0, 0, 480, 576, 0, 0
      crt_range5  34001-38000, 40-80, 1.000, 3.200, 2.200, 0.020, 0.106, 0.607, 0, 0, 576, 600, 0, 0

Now, the remarked values are the ones you'll need to edit. The first one (2.187) corresponds to the right border. Make it bigger to narrow the visible picture to the left. It could be the other value too in case you've rotated the monitor the other way round (I can say it for sure). But that's where you need to play, definitely.

[Ibaroh]

Thank you so much Calamity. I changed the 2.187 to 7.000 an now there is enough horizontal play for every lowres game.

Thank you jadder for the idea with the coil. There are some screws on the monitor pcb for some additional adjustment but I found no one for the horizontal size.

Perhaps there is something wrong with the monitor.  Every setting of the osd has a huge bandwidth for adjustment, except for the horizontal size setting which is very restricted 

[adder]

ah ok definitely dont touch anything else on the monitor chassis such as the screws you found as some of them should not be touched unless you are an engineer or are calibrating the monitor with the proper test equipment etc