Ps/2 Compatible Mouse Driver !exclusive! Direct

There are several types of PS/2 compatible mouse drivers, including:

In real mode or protected mode, you must set up the IDT (Interrupt Descriptor Table) for IRQ12 (vector 0x2C if PIC is in standard remap). Example for 32-bit protected mode:

Next steps: Add absolute positioning (tablet mode), dynamic rate switching, or hook the driver into a windowing system. Happy coding! ps/2 compatible mouse driver

: IntelliMouse and wheel mice use a 4-byte packet, but we’ll start with standard 3-byte mode.

: PS/2 devices use interrupts to notify the CPU immediately when they have data. USB devices use polling , where the computer constantly "asks" the mouse for its status. There are several types of PS/2 compatible mouse

Developing a driver for a PS/2 mouse requires a distinct separation of concerns: the driver must first interface with the 8042 Super I/O controller (the keyboard controller) to enable the mouse channel, and subsequently interface directly with the mouse hardware to interpret movement and button state data. This paper outlines a driver model suitable for a monolithic kernel or embedded system where direct hardware access is permitted.

mouse_x += dx; mouse_y -= dy; // Invert Y for screen coordinates : IntelliMouse and wheel mice use a 4-byte

For brevity, a full bootable example is beyond scope, but a working driver stub in C for a hobby OS is available on GitHub . It includes:

PS/2 compatible mouse drivers remain an important part of computing, particularly in legacy systems and industrial applications. Understanding the functionality and types of PS/2 drivers can help developers and users troubleshoot issues and ensure smooth operation. As technology continues to evolve, it will be interesting to see how PS/2 compatible mouse drivers adapt to changing computing landscapes.

mouse_send_command(0xF3); // Set sample rate mouse_send_command(200); mouse_send_command(0xF3); mouse_send_command(100); mouse_send_command(0xF3); mouse_send_command(80); mouse_send_command(0xF2); // Get device ID – should return 3