I see this topic is now about MacOS rather than the Raspberry Pi 4.
I have finished the disk image for the Pi 4, as there were some requests for it. Unfortunately I couldn't get the scaling to work fluently, so it's not using that. Framerate is then at a constant rate of 50 FPS. https://www.jeroenderwort.nl/msx-mini-op-de-raspberry-pi-4/
Still wondering if Sedai Linux will make a difference. Will that allow me to run openMSX at a high framerate with scaling?
If you really need to know - the Pi3 used dispmanx when using kms/fkms, the pi4 only supports fkms.
RetroPi/RetroArch - Liberto or whatever front end used an adjusted SDL version - please talk to the creators of the bistros about this problem. Bring it up and I'm sure you get a bunch of replies that this has already been covered.
I am the author of the DispmanX backend for SDL1.2.x on Raspberry Pi.
DO NOT use DispmanX or SDL1.x anymore: both are deprecated, broken on current Linux versions and unsupported.
If OpenMSX runs on SDL2, then getting perfectly fullspeed emulation of any MSX model on the Pi2/3/4 is perfectly possible:
-USE SDL2, stop using SDL1.x (again!)
-Build and SDL2 version with KMSDRM video backend support. Use current soures for that. DO NOT run emulators inside X11: run them on KMSDRM, with NO X11 server running.
-DISABLE any software scaling on the emulator side. EVERY one. Do not attempt to do any software scaling: SDL2 takes care of fullscreen scaling without using any CPU cycles.
gaula82:
- the current openMSX source code uses SDL2, we are planning to make an official release soon. Until then, the current master source code can be used.
- we do some software scaling, because depending on the scaling, we can add extra effects like scanlines. We use SOFT fullscreen, so SDL_WINDOW_FULLSCREEN_DESKTOP. Can we assume that SDL2 will handle the actual scaling for this?
