Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first
Retropie on pi 5 hdmi-vga to jpac to Nanao MS9, how to set up boot config for 15khz?
-
Anyone know how to setup the boot config to boot at 15khz with this setup?
-
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.
Contributions to the project are always appreciated, so if you would like to support us with a donation you can do so here.
Hosting provided by Mythic-Beasts. See the Hosting Information page for more information.