Does Amiga 3000 Have Hardware Mouse Acceleration?

This article investigates the input architecture of the Commodore Amiga 3000 to determine if it features hardware-level mouse acceleration. It details how mouse signals are processed by the system chips and distinguishes between hardware capabilities and software drivers. The conclusion confirms that cursor speed adjustment is managed entirely through the Workbench operating system rather than dedicated circuitry.

The Commodore Amiga 3000, released in 1990, utilizes a standard DB23 port for mouse input similar to earlier models in the Amiga line. The hardware interface reads quadrature signals from the mouse to determine direction and relative movement deltas. These raw signals are processed by the system’s I/O controllers, which pass the data to the central processor. There is no dedicated logic on the motherboard designed to analyze the speed of these movements or alter the cursor velocity independently of the CPU.

Mouse acceleration on the Amiga 3000 is implemented strictly through software within the AmigaOS. The Input device driver receives the raw movement data and applies an acceleration curve based on user preferences set in the Workbench Mouse preferences panel. This software-based approach allows users to customize how quickly the cursor moves across the screen relative to the physical speed of their hand movements. Because this function relies on the operating system’s code rather than fixed hardware logic, it can be modified or replaced by third-party drivers without changing the computer’s physical components.

In summary, the Commodore Amiga 3000 does not possess hardware support for mouse acceleration. The system hardware provides only the raw positional data required to track movement. All calculations regarding cursor speed and acceleration are performed by the software, giving users flexibility but relying on the system’s CPU resources to manage input smoothing and velocity scaling.