Hi,
I got the 1.14.0 version (RetroArch-msvc2019-UWP_x64.msixbundle) installed on my Xbox One S in Dev Mode.
I have got the a5200.rom in correct spot and can load the the core (atari800_libretro.dll) just fine.
When I load the content (atari game) the screen will go blank for 2-3 sec and that it will return to Xbox menu (will quit the RetroArch).
here is my log:
[INFO] === Build =======================================
[INFO] CPU Model Name: Unknown
[INFO] Capabilities: MMX MMXEXT SSE SSE2 SSE3 SSE4 SSE4.2 AES AVX
[INFO] Built: Dec 13 2022
[INFO] Version: 1.14.0
[INFO] =================================================
[INFO] [Input]: Found input driver: "uwp".
[INFO] [Environ]: SET_PIXEL_FORMAT: RGB565.
[INFO] [Core]: Version of libretro API: 1, Compiled against API: 1
[INFO] [Audio]: Set audio input rate to: 48000.00 Hz.
[INFO] [Video]: Set video size to: 1920x1080.
[WARN] [XInput]: No guide button support.
[INFO] [Joypad]: Found joypad driver: "xinput".
[INFO] [D3D11]: Device created (Feature Level: 10.1)
[INFO] [D3D11]: Found GPU at index 0: "SraKmd".
[INFO] [D3D11]: Found GPU at index 1: "Microsoft Basic Render Driver".
[INFO] [D3D11]: Using GPU index 0.
[INFO] [Video]: Found display server: "null".
[INFO] [XAudio2]: Requesting 64 ms latency, using 64 ms latency.
[INFO] [Display]: Found display driver: "d3d11".
[INFO] [Playlist]: Loading history file: "U:\Users\UserMgr0\AppData\Local\Packages\1e4cf179-f3c2-404f-b9f3-cb2070a5aad8_8ngdn9a6dx1ma\LocalState\content_history.lpl".
[INFO] [Playlist]: Loading history file: "U:\Users\UserMgr0\AppData\Local\Packages\1e4cf179-f3c2-404f-b9f3-cb2070a5aad8_8ngdn9a6dx1ma\LocalState\content_music_history.lpl".
[INFO] [Playlist]: Loading history file: "U:\Users\UserMgr0\AppData\Local\Packages\1e4cf179-f3c2-404f-b9f3-cb2070a5aad8_8ngdn9a6dx1ma\LocalState\content_image_history.lpl".
[INFO] [Playlist]: Loading favorites file: "U:\Users\UserMgr0\AppData\Local\Packages\1e4cf179-f3c2-404f-b9f3-cb2070a5aad8_8ngdn9a6dx1ma\LocalState\content_favorites.lpl".
[WARN] [XInput]: No guide button support.
[INFO] [Autoconf]: XInput Controller configured in port 1.
[INFO] [Content]: Updating firmware status for: "S:\Program Files\WindowsApps\1e4cf179-f3c2-404f-b9f3-cb2070a5aad8_1.14.0.0_x64__8ngdn9a6dx1ma\cores\atari800_libretro.dll" on "U:\Users\UserMgr0\AppData\Local\Packages\1e4cf179-f3c2-404f-b9f3-cb2070a5aad8_8ngdn9a6dx1ma\LocalState\system\".
[INFO] [Core]: Using content: "D:\DevelopmentFiles\Games\Atari 800\International Karate.atr".
[INFO] [Core]: Content ran for a total of: 00 hours, 00 minutes, 00 seconds.
[INFO] [Core]: Unloading core..
[INFO] [Core]: Unloading core symbols..
[INFO] [Video]: Average monitor Hz: 59.941258 Hz. (5.679 % frame time deviation, based on 2048 last samples).
[INFO] === Build =======================================
[INFO] CPU Model Name: Unknown
[INFO] Capabilities: MMX MMXEXT SSE SSE2 SSE3 SSE4 SSE4.2 AES AVX
[INFO] Built: Dec 13 2022
[INFO] Version: 1.14.0
[INFO] =================================================
[INFO] [Input]: Found input driver: "uwp".
[INFO] [Core]: Loading dynamic libretro core from: "S:\Program Files\WindowsApps\1e4cf179-f3c2-404f-b9f3-cb2070a5aad8_1.14.0.0_x64__8ngdn9a6dx1ma\cores\atari800_libretro.dll"
[INFO] [Environ]: SET_CONTROLLER_INFO.
[INFO] Controller port: 1
[INFO] ATARI Joystick (ID: 513)
[INFO] ATARI Keyboard (ID: 259)
[INFO] Controller port: 2
[INFO] ATARI Joystick (ID: 513)
[INFO] ATARI Keyboard (ID: 259)
[INFO] Controller port: 3
[INFO] ATARI Joystick (ID: 513)
[INFO] ATARI Keyboard (ID: 259)
[INFO] Controller port: 4
[INFO] ATARI Joystick (ID: 513)
[INFO] ATARI Keyboard (ID: 259)
[INFO] [Environ]: SET_VARIABLES.
[INFO] [Overrides]: Redirecting save file to "U:\Users\UserMgr0\AppData\Local\Packages\1e4cf179-f3c2-404f-b9f3-cb2070a5aad8_8ngdn9a6dx1ma\LocalState\saves\International Karate.srm".
[INFO] [Overrides]: Redirecting save state to "U:\Users\UserMgr0\AppData\Local\Packages\1e4cf179-f3c2-404f-b9f3-cb2070a5aad8_8ngdn9a6dx1ma\LocalState\states\International Karate.state".
[INFO] [Environ]: GET_LOG_INTERFACE.
[INFO] [Environ]: SYSTEM_DIRECTORY: "U:\Users\UserMgr0\AppData\Local\Packages\1e4cf179-f3c2-404f-b9f3-cb2070a5aad8_8ngdn9a6dx1ma\LocalState\system\".
[INFO] [Environ]: CORE_ASSETS_DIRECTORY: "U:\Users\UserMgr0\AppData\Local\Packages\1e4cf179-f3c2-404f-b9f3-cb2070a5aad8_8ngdn9a6dx1ma\LocalState\downloads\".
[INFO] [Environ]: GET_SAVE_DIRECTORY.
[libretro INFO] Retro SYSTEM_DIRECTORY U:\Users\UserMgr0\AppData\Local\Packages\1e4cf179-f3c2-404f-b9f3-cb2070a5aad8_8ngdn9a6dx1ma\LocalState\system\
[libretro INFO] Retro SAVE_DIRECTORY U:\Users\UserMgr0\AppData\Local\Packages\1e4cf179-f3c2-404f-b9f3-cb2070a5aad8_8ngdn9a6dx1ma\LocalState\saves\
[libretro INFO] Retro CONTENT_DIRECTORY U:\Users\UserMgr0\AppData\Local\Packages\1e4cf179-f3c2-404f-b9f3-cb2070a5aad8_8ngdn9a6dx1ma\LocalState\downloads\
[INFO] [Environ]: SET_PIXEL_FORMAT: RGB565.
[INFO] [Environ]: SET_INPUT_DESCRIPTORS:
[INFO] RetroPad, Port 1, Button "B (bottom)" => "Return"
[INFO] RetroPad, Port 1, Button "Y (left)" => "Help"
[INFO] RetroPad, Port 1, Button "Select" => "Select"
[INFO] RetroPad, Port 1, Button "Start" => "Start"
[INFO] RetroPad, Port 1, Button "D-Pad Up" => "Up"
[INFO] RetroPad, Port 1, Button "D-Pad Down" => "Down"
[INFO] RetroPad, Port 1, Button "D-Pad Left" => "Left"
[INFO] RetroPad, Port 1, Button "D-Pad Right" => "Right"
[INFO] RetroPad, Port 1, Button "A (right)" => "Fire 1"
[INFO] RetroPad, Port 1, Button "X (up)" => "Fire 2"
[INFO] RetroPad, Port 1, Button "L" => "Option"
[INFO] RetroPad, Port 1, Button "R" => "Atari800 Menu"
[INFO] RetroPad, Port 1, Button "L2" => "Space"
[INFO] RetroPad, Port 1, Button "R2" => "Esc"
[INFO] RetroPad, Port 1, Button "L3" => "Virtual keyboard"
[INFO] RetroPad, Port 1, Button "R3" => "R3"
[INFO] [Environ]: GET_VARIABLE: atari800_opt1 = "disabled"
[INFO] [Environ]: GET_VARIABLE: atari800_opt2 = "disabled"
[INFO] [Environ]: GET_VARIABLE: atari800_resolution = "336x240"
[INFO] [Environ]: GET_VARIABLE: atari800_system = "400/800 (OS B)"
[INFO] [Environ]: GET_VARIABLE: atari800_ntscpal = "NTSC"
[INFO] [Environ]: GET_VARIABLE: atari800_internalbasic = "disabled"
[INFO] [Environ]: GET_VARIABLE: atari800_sioaccel = "disabled"
[INFO] [Environ]: GET_VARIABLE: atari800_cassboot = "disabled"
[INFO] [Environ]: GET_VARIABLE: atari800_artifacting = "disabled"
[INFO] [Environ]: GET_VARIABLE: atari800_keyboard = "poll"
[INFO] [Content]: Content loading skipped. Implementation will load it on its own.
[INFO] [Environ]: SET_KEYBOARD_CALLBACK.
[INFO] [Environ]: GET_VARIABLE: atari800_opt1 = "disabled"
[INFO] [Environ]: GET_VARIABLE: atari800_opt2 = "disabled"
[INFO] [Environ]: GET_VARIABLE: atari800_resolution = "336x240"
[INFO] [Environ]: GET_VARIABLE: atari800_system = "400/800 (OS B)"
[INFO] [Environ]: GET_VARIABLE: atari800_ntscpal = "NTSC"
[INFO] [Environ]: GET_VARIABLE: atari800_internalbasic = "disabled"
[INFO] [Environ]: GET_VARIABLE: atari800_sioaccel = "disabled"
[INFO] [Environ]: GET_VARIABLE: atari800_cassboot = "disabled"
[INFO] [Environ]: GET_VARIABLE: atari800_artifacting = "disabled"
[INFO] [Environ]: GET_VARIABLE: atari800_keyboard = "poll"
[libretro INFO] WRAP EMU THD