2.1 Functional Requirements

2.1.1 Controller Input

• Read Dreamcast controller state
• Map controller buttons to terminal functions
• Support analog stick for cursor movement
• Handle button combinations
• Configurable key bindings

2.1.2 Keyboard Input

• Read keyboard input (via Maple bus keyboard)
• Handle key press/release events
• Support modifier keys (Shift, Ctrl, Alt)
• Handle special keys (arrows, function keys, etc.)

2.1.3 VMU Input

• Read VMU button state
• Map VMU buttons to functions
• Handle VMU as secondary input

2.1.4 Input Processing

• Character input for terminal
• Escape sequence generation from special keys
• Input buffering
• Input history