Created Command Line Arguments (markdown)

Command-Line-Arguments.md

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+```
+DuckStation Qt Frontend Version 0.1-3076-g7f6586b3 (master)
+https://github.com/stenzek/duckstation
+
+Usage: duckstation-qt-x64-ReleaseLTCG.exe [parameters] [--] [boot filename]
+
+  -help: Displays this information and exits.
+  -version: Displays version information and exits.
+  -batch: Enables batch mode (exits after powering off).
+  -fastboot: Force fast boot for provided filename.
+  -slowboot: Force slow boot for provided filename.
+  -resume: Load resume save state. If a boot filename is provided,
+    that game's resume state will be loaded, otherwise the most
+    recent resume save state will be loaded.
+  -state <index>: Loads specified save state by index. If a boot
+    filename is provided, a per-game state will be loaded, otherwise
+    a global state will be loaded.
+  -statefile <filename>: Loads state from the specified filename.
+    No boot filename is required with this option.
+  -fullscreen: Enters fullscreen mode immediately after starting.
+  -nofullscreen: Prevents fullscreen mode from triggering if enabled.
+  -portable: Forces "portable mode", data in same directory.
+  -nocontroller: Prevents the emulator from polling for controllers.
+                 Try this option if you're having difficulties starting
+                 the emulator.
+  -settings <filename>: Loads a custom settings configuration from the
+    specified filename. Default settings applied if file not found.
+  --: Signals that no more arguments will follow and the remaining
+    parameters make up the filename. Use when the filename contains
+    spaces or starts with a dash.
+```