@zing i found the problem it is autochange
i mean that boot is on crt bu es runs on hdmi

alvin, i just forced retroarch using console hack and installed mednafen and yaba sanshiro cores.
content did not list, so it could be opened with libretro w/o any args

@Zing anyways, recalbox sux, it did eat my entire 16gb sd card

alvin, i just forced retroarch using console hack and installed mednafen and yaba sanshiro cores.
content did not list, so it could be opened with libretro w/o any args

@alvin i know but mednafen runs s m o o t h which allows you to emulate nec pce pcfx sega saturn(and about sega saturn theres yaba sanshiro which runs nice on rpi3b+).

When i found some redump format gdroms(puyo puyo fever, dream passport 3, etc.) i wanted to convert them to chd with chdman. After transferring to my rpi3b+ they did not open properly (empty Dreamcast dashboard or even core crashing on rom). Help

Really because it is 32 bits console with nec v810 cpu which is their own simple architecture based on pc engine. Pc fx ga emulation should work as well because it is now 64 bits

dear @pitch64 well yaba sanshiro runs perfectly on arm i tried on retro pie it gave 30fps w/o tesselation

unlikely from retropie idk why recalbox allows saturn emulation only from rpi4
[WHY]

@zing when I was on HDMI it was running p e r f e c t. No lags. No anomalies. But when I switched to crt the troubles started.

@ssssq also got enter key issue(but that's not your problem )

after perfect crt setup I decided to play some dreamcast games. I had some gd-rom rips taken from cdromance and one ripped from my own gd-rom. here's the list of games i've got: sonic adventure 2(Echelon. my gd rom rip), puyo puyo fever(DCRES, CDromance, chd), puyo puyo 4(CDromance chd). I started puyo puyo fever, but when audio surround logo apperars I saw some graphical issues(some unknown shards of color yellow and green) next the most of the game's intro was missing textures and title screen was black. when I tried to go into menu the emulator crashed. after this I tried sonic adventure 2. the game functions as normal but when it tries to load a level it freezes, but you can exit from it. And puyo puyo 4 was played as normal(no issuses). Please fix the issue, who also got the same problem write in comments. I've got RPI3B+.