Operating systems, infrastructure, emulation, and technical history.
Diagnose stretched retro games by separating core geometry, pixel aspect ratio, integer scaling, overscan, and saved display overrides.
Isolate emulator black screens with verified content, lawful firmware, verbose logs, core requirements, clean overrides, and safe renderer tests.
Separate physical stick drift from mapping and calibration faults, then apply the smallest safe deadzone at the correct input layer.
Resolve missing or invalid emulator firmware by checking core requirements, configured paths, exact names, hashes, permissions, and lawful dumps.
Recover an incompatible save state by preserving every artifact, matching the original trusted core and content, then migrating to an in-game save.
Separate emulated-GPU shader generation from RetroArch post-processing, then test caches, official drivers, backend, and documented precompile modes.
Diagnose incorrect emulator speed by separating throttle and region settings, host overload, display synchronization, and intentional console slowdown.
Build a RetroArch decorative border with licensed artwork, correct alpha, a measured custom viewport, safe overlay configuration, and scoped presets.
Configure RetroArch CRT shaders from an official preset, then calibrate geometry, scanlines, mask, brightness, scaling, performance, and preset scope.
Configure RetroArch local multiplayer by separating physical controller assignment from emulated multitap device types, port rules, remaps, and hotkeys.