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GroovyArcade live-CD 2022 (collaborative effort)

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Sonny_Jim_Pin:
I've had a bit more time to investigate my booting issue and it seems to be overzealous EFI security on the particular motherboard I have.  I can boot a USB key and install GA just fine.  For some reason, as soon as my motherboard boots something else other than the drive that GA was installed to, it'll refuse to boot GA again.  I'm guessing it's some security feature to stop office people booting their own USB keys at work.

Right now I'm trying to figure out a way to make vertical games look good on a vertical 15kHz 9:16 monitor.  Setting 'aspect 16:9' in mame.ini seems to do the trick, as it'll display most games at the proper 3:4 resolution but with black bars at the top and bottom.  I am currently trying to create a layout file that will use the unused space (all 100 or so pixels of it), but I'm having a few difficulties with resolution.

So I boot up a game, lets say Time Pilot and go to machine information:



If I'm reading that right, it says the native res of Time Pilot is 224x256 and the current videomode is 224x344.  So I generate a 224x344 PNG to use as a bezel and the following layout file:


--- Code: ---<!-- timeplt.lay -->
<mamelayout version="2">
  <element name="bezel">
    <image file="timeplt.png" />
  </element>
  <view name="Bezel Artwork">
    <bezel element="bezel">
      <bounds left="0" top="0" right="224" bottom="344" />
    </bezel>
    <screen index="0">
      <bounds left="0" top="0" right="224" bottom="256" />
    </screen>
  </view>
</mamelayout>


--- End code ---
But when I load up MAME with the resulting files it decides to change the resolution from 224x344 to 244x464 and adds in another set of black bars:



My hunch is that the aspect 16:9 in mame.ini is forcing the black bars each time, but I'm not really sure how to fix it/make it work.

EDIT:  Yep, needed to set 'aspect 4:3' on the games I want to use bezel artwork with.

edomatic:
Hi guys,

How does one adjust for overscan in games on groovyarcade 2022?

i dont want to fiddle with the Tv setup as its used for consoles too, but something i noticed is mame now have in video options something like zoom to screen area but its greyed out

Substring:
Vertical overscan ? you can't.
Horizontal overscan -> https://gitlab.com/groovyarcade/support/-/wikis/4-Issues-and-Troubleshooting/4.7-Image-Centering

edomatic:
thanks Substring after reading i understand that:

we cannot so the vertical ( unless hardware adjust with pots in TV or service menu of tv or video slider option in mame but causing artifacts in game)
It seems we can do horizontal centering ( also possible in mame video sliders without causing artifacts), but not horizontal width-adjustements of the screen without creating game artifacts  using those same video sliders in mame
 
The issue i always have is that we have games like awesome games like r-type that have a resolution as such that we end up with standard generic_15 with a huge overscan in comparison to other games

My current workaround for this issue is to adjust my overscan for a game like r-type (as it is often the biggest overscan of all games as for me at least) ,after that change, most arcade games that i play (15khz) will have no overscan after this change, but the game-screen will not fill the entire screen

Is there another way to do this properly, how are you guys dealing with this on your setups ? Do you have another aproach to have all games full screen with no overscan?

Calamity:

--- Quote from: edomatic on June 29, 2022, 08:53:13 am ---Is there another way to do this properly, how are you guys dealing with this on your setups ? Do you have another aproach to have all games full screen with no overscan?

--- End quote ---

No. You need to adjust the hardware for correct vertical size.

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