Retropie on pi 5 hdmi-vga to jpac to Nanao MS9, how to set up boot config for 15khz?

Ericthegeat

Anyone know how to setup the boot config to boot at 15khz with this setup?

mitu

Does this have anything to do with RetroPie or is it a general Raspberry Pi question ?

You can force the Raspberry Pi to output a certain video mode suited for a 15khz monitor forcing an EDID which contains that video mode - see for instance https://forums.raspberrypi.com/viewtopic.php?t=370192.

Ericthegeat

@mitu for retropie, I can't do the resolution from the config file anymore?

mitu

@Ericthegeat No, that's not working for the Pi5 and - with current RaspiOS - other models anymore. Everything you find that says modify config.txt and add/change ... will not work as far as video resolution is concerned.

Those configuration options were read by the RPI firmware and applied directly through VPU commands, but the Pi5 doesn't have a firmware and the other models are also not using that approach anymore, resorting to 'standard' Linux methods for (auto/self) configuration during boot and after the boot has completed.

EDIT: Out of curiosity, how is this kind of converter configured on a normal PC with Linux ? What are the commands/configurations needed if you'd have a Linux PC and want to use it ?

Ericthegeat

@mitu you use crtemudriver by calamity, btw I found and modified a edid file and now I have it running but the text is impossible to read any tips?

mitu

@Ericthegeat said in Retropie on pi 5 hdmi-vga to jpac to Nanao MS9, how to set up boot config for 15khz?:

@mitu you use crtemudriver by calamity,

That's a Windows utility, I was asking about a Linux solution.

btw I found and modified a edid file and now I have it running but the text is impossible to read any tips?

For low (CRT) resolutions try a CRT theme, there are several in the EmulationStation themes that are available in RetroPie. You could also try using a 480i resolution, if the arcade monitor supports it, for EmulationStation and switch to a 240p resolution (with the runcommand menu) when running a game.