Using Mame and other emulators in full LCD 3.5" screen

Tagged: Adafruit piTFT 3.5, LCD fulll screen

This topic has 5 replies, 2 voices, and was last updated 11 years ago by wilsonb.

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09/01/2015 at 18:33 #105182

wilsonb
Participant

On this topic including RetroPie. I am using 3.5″ PiTFT (Pi 2 & previous working edition on RetroPie)

I would like to fill the whole 3.5″ LCD, currently it has black bars on right/left side. I know the only way might stretch the pixels.

Trying to figure out what config file controls games(mame) on LCD. The RetroPie front end menu system fits nicely full screen.

09/01/2015 at 18:33 #105184

wilsonb
Participant

[attachment file=”retropie and joust.jpg”]

09/01/2015 at 18:50 #105187

petrockblog
Keymaster

Change aspect_ratio_index in /opt/retropie/configs/all/retroarch.cfg to force to the aspect of your screen.

for my dev monitor (5:4) that would be aspect_ratio_index = “10”

you can count from 0 in the retroarch gui settings to work out the value without having to save the entire retroarch.cfg or can configure from there / save new config and extract the value needed.

09/01/2015 at 18:55 #105189

petrockblog
Keymaster

here are the values

ASPECT_RATIO_4_3 = 0,
ASPECT_RATIO_16_9,
ASPECT_RATIO_16_10,
ASPECT_RATIO_16_15,
ASPECT_RATIO_1_1,
ASPECT_RATIO_2_1,
ASPECT_RATIO_3_2,
ASPECT_RATIO_3_4,
ASPECT_RATIO_4_1,
ASPECT_RATIO_4_4,
ASPECT_RATIO_5_4,
ASPECT_RATIO_6_5,
ASPECT_RATIO_7_9,
ASPECT_RATIO_8_3,
ASPECT_RATIO_8_7,
ASPECT_RATIO_19_12,
ASPECT_RATIO_19_14,
ASPECT_RATIO_30_17,
ASPECT_RATIO_32_9,
ASPECT_RATIO_CONFIG,
ASPECT_RATIO_SQUARE,
ASPECT_RATIO_CORE,
ASPECT_RATIO_CUSTOM,

16:9 is aspect_ratio_index = 1

09/01/2015 at 21:46 #105209

petrockblog
Keymaster

No need to post the full config here – makes threads hard to follow – please use pastebin or similar.

if you are talking about the default mame4all, or advmame – neither are retroarch emulators so they dont use this config. I think mame4all-pi might need a patch to “fit to screen”.

09/02/2015 at 16:04 #105272

wilsonb
Participant

Thanks for the help.

Where do you see mame4all-pi ?
Im not seeing that.

Were you referring to the whole package in general Mame4all-pi and not a config file?

Thanks
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