2.1 Functional Requirements

2.1.1 VMU Display

• Render terminal content to VMU LCD (48x32 pixels, monochrome)
• Mirror main terminal display on VMU
• Independent VMU terminal session
• Scrollable VMU display
• Configurable VMU display mode

2.1.2 VMU Input

• Use VMU buttons for input (if applicable)
• VMU as secondary input device
• VMU button state reporting

2.1.3 VMU Detection

• Detect connected VMUs
• Identify VMU by port and slot
• Report VMU capabilities
• Handle VMU hot-plugging