Raspberry Pi 5 VEC lets you add a custom mode using the non-standard cmode parameter. Try appending this to "cmdline.txt":Warnings:
1. "cmdline.txt" should be all on one line, separated by spaces. Be sure not to break it.
2. These instructions are for Raspberry Pi 5 only, and current Raspberry Pi OS kernels only, and are not exactly stable (mainstream Linux might end up implementing this in a different way, or not at all).
3. The rules about what makes a 'valid' TV mode are arcane: no time to explain now. The 15429 kHz modes have narrower pixels. Don't forget to append ",i" for interlace.
4. Retroarch might do some extra scaling or filtering? If the mode is not one that it's expecting, things might get weird.
Code:
drm_rp1_vec.cmode=13500,640/56/64/98,480/6/6/33,i1. "cmdline.txt" should be all on one line, separated by spaces. Be sure not to break it.
2. These instructions are for Raspberry Pi 5 only, and current Raspberry Pi OS kernels only, and are not exactly stable (mainstream Linux might end up implementing this in a different way, or not at all).
3. The rules about what makes a 'valid' TV mode are arcane: no time to explain now. The 15429 kHz modes have narrower pixels. Don't forget to append ",i" for interlace.
4. Retroarch might do some extra scaling or filtering? If the mode is not one that it's expecting, things might get weird.
Statistics: Posted by njh — Wed Sep 17, 2025 8:19 pm