Module mouse 

PS/2 Mouse driver (IRQ12)

Supports standard 3-byte PS/2 mouse and IntelliMouse (4-byte, scroll wheel). Initialization follows the standard PS/2 controller protocol via I/O ports 0x60 (data) and 0x64 (command/status).

Structs

EventBuffer 🔒

MouseEvent

A decoded mouse event.

Constants

CMD_ENABLE_AUX 🔒

CMD_READ_CFG 🔒

CMD_SEND_TO_MOUSE 🔒

CMD_WRITE_CFG 🔒

EVENT_BUF_SIZE 🔒

MOUSE_ACK 🔒

MOUSE_ENABLE_STREAM 🔒

MOUSE_GET_ID 🔒

MOUSE_RESET 🔒

MOUSE_SET_DEFAULTS 🔒

MOUSE_SET_SAMPLE_RATE 🔒

PS2_CMD 🔒

PS2_DATA 🔒

STATUS_INPUT_FULL 🔒

STATUS_OUTPUT_FULL 🔒

Statics

EVENT_BUF 🔒

INTELLIMOUSE 🔒

Whether IntelliMouse (4-byte) mode is active

MOUSE_ABS_X 🔒

MOUSE_ABS_Y 🔒

MOUSE_CYCLE 🔒

Current byte index within the current packet (0, 1, 2, [3])

MOUSE_READY

Mouse is initialized and streaming

PACKET_BUF 🔒

SCREEN_H 🔒

SCREEN_W 🔒

Functions

decode_packet 🔒

Decode the current packet buffer and push a MouseEvent.

flush_output 🔒

Drain any pending bytes in the PS/2 output buffer.

handle_irq

Called from the IDT IRQ12 handler (interrupt context, interrupts disabled).

has_event

Returns true if at least one mouse event is pending.

init

Initialize the PS/2 mouse.

mouse_cmd 🔒

Send a command to the mouse and wait for ACK. Returns true on success.

mouse_cmd_arg 🔒

Send a command + argument to the mouse and wait for ACK.

mouse_pos

Returns the current accumulated mouse position (pixel coordinates).

mouse_write 🔒

Send a byte directly to the mouse (via the 0xD4 mux).

ps2_read 🔒

Read a byte from the PS/2 data port (waits for data).

ps2_write_cmd 🔒

Write a byte to the PS/2 command port.

ps2_write_data 🔒

Write a byte to the PS/2 data port.

push_event_from_hid

Push a mouse event from USB HID or other non-PS/2 source.

read_event

Dequeue the oldest mouse event (non-blocking).

try_enable_intellimouse 🔒

Try activating IntelliMouse scroll wheel mode. Returns true if the mouse identifies as IntelliMouse (ID = 0x03).

wait_read 🔒

Spin until the PS/2 output buffer has data (safe to read).

wait_write 🔒

Spin until the PS/2 input buffer is empty (safe to write).