@ohmycommodore From what I've tried out, systems where the resolution is the same as ES (probably 320x240) are fine, it's only when the resolution needs to switch that the problem occurs. You can definitely try it out and just send that command to clear out the frame buffer if you get stuck at any point. The one or two N64 games I tried worked really well, as well as psx games with enhanced resolution and the older systems with one or two frames of runahead.

I'd be interested in seeing how RT works with Pi4 and Lakka though. I haven't used it much as I have all my PSX games in chd and didn't really want to change them all over.

@jamesfarnhamlong said in Retrotink U - Higher res ES and PSX games:

The 450x270 looks best, but I was wondering if it was possible to run one @ 720x578 to improve the picture a little. I know the TV supports this as I have an old Apple TV that uses this revolution. How do I write the hdmi_timing to make this work? Is there a calculator or something I could use?

Try this - http://eightvirtues.com/lakka/hat/RPi HDMI Timings Calculator and Core Docs.ods (courtesy of https://www.youtube.com/channel/UCtF_2HGXXPlUi1J0Euw1Qrw).

Is it possible to adapt this to run at 2x resolution so I can use the enhanced graphics in psi-rearmed. Is there a way to have this only affect psx game launching? Or would it then throw out all the other systems? Is there much point?

Maybe if you use the calculator linked above you can derive the correct HDMI timings to use. As for the effect on the other systems, you'll have to ask the author of those configs.

@edmaul69 Cool.. I have a fan currently attached to the Retro Pie.. I guess that makes sense to get it then.

In my arcade build i found the fan that came with the flat pack kit was really loud when run from full power. It was a 12v fan. So i just found a left over 5v power brick and connected that to the fan and it runs about half speed, just the perfect amount of air flow without the noise.