See also: Kernel Index, Filesystem, System Services

This directory contains device drivers for storage, input, and terminal output.

Components

ATA Driver

ata/ata.c — PATA (Parallel ATA) disk driver.

  • Primary and secondary channel support

  • Master/slave drive detection

  • Sector read/write (LBA28)

  • IDENTIFY command for drive parameters

  • Software reset

Floppy Disk Controller (FDC) Driver

fdc/fdc.c — Floppy disk controller driver.

  • LBA-based sector read/write

  • Seek, reset, and drive parameter detection

Keyboard Driver

keyboard/keyboard.c — Platform-independent generic keyboard input handler.

  • Scancode processing (receives scancodes from arch-specific PS/2 driver)

  • Forwards processed key events to TTY line discipline

  • Modifier key tracking (Shift, Ctrl, Alt)

Platform-specific PS/2 controller driver lives at kernel/arch/i686/drivers/ps2.c.

TTY Subsystem

tty/tty.c — Full terminal/TTY driver with devfs integration.

  • Canonical and raw modes

  • Line editing (backspace, CTRL+C/D/U/W/Z)

  • Echo control

  • Circular input/output buffers

  • ANSI escape sequence support

  • /dev/tty0 device node

Typical Work in This Area

  • Add or improve hardware support

  • Debug IRQ-driven input/output behavior

  • Extend terminal and console capabilities

Revision History

v2.0

Updated for v0.28: detailed component descriptions with feature listings for ATA, FDC, keyboard, and TTY

v1.0

Initial drivers subsystem summary