Module keyboard 

PS/2 keyboard driver for x86_64.

Reads scancodes from I/O port 0x60, decodes them via the pc_keyboard crate (ScancodeSet1, US 104-key layout), and pushes decoded ASCII bytes to a lock-free ring buffer. The shell reads from this buffer.

On non-x86_64 architectures, all functions are no-op stubs.

Constants

KEY_DELETE

Single-byte key code for Delete (GUI mode).

KEY_DOWN

Single-byte key code for Down arrow (GUI mode).

KEY_END

Single-byte key code for End (GUI mode).

KEY_HOME

Single-byte key code for Home (GUI mode).

KEY_LEFT

Single-byte key code for Left arrow (GUI mode).

KEY_RIGHT

Single-byte key code for Right arrow (GUI mode).

KEY_UP

Single-byte key code for Up arrow (GUI mode).

MOD_ALT

Bitmask: Alt is held.

MOD_CTRL

Bitmask: Ctrl is held.

MOD_SHIFT

Bitmask: Shift is held.

MOD_SUPER

Bitmask: Super/Win is held.

Functions

get_modifiers

Get the current modifier key bitmask.

handle_scancode

Handle a scancode from the PS/2 keyboard interrupt (vector 33).

init

Initialize the PS/2 keyboard driver.

is_initialized

Check if the keyboard driver has been initialized.

read_key

Read a decoded key byte from the keyboard buffer (non-blocking).

set_gui_mode

Enable or disable GUI key encoding mode.