Device Drivers

Device Drivers

ModuOS includes drivers for essential hardware components.

Driver Architecture

┌────────────────────────────────────────┐
│        Kernel Subsystems               │
└────────────┬───────────────────────────┘
             │
┌────────────▼───────────────────────────┐
│        Device Drivers                  │
│  ┌──────────┐  ┌──────────┐           │
│  │ Storage  │  │ Graphics │           │
│  │ ATA/AHCI │  │   VGA    │           │
│  └────┬─────┘  └────┬─────┘           │
│  ┌────▼─────┐  ┌────▼─────┐           │
│  │  Input   │  │  System  │           │
│  │   PS/2   │  │ PCI/ACPI │           │
│  └──────────┘  └──────────┘           │
└────────────┬───────────────────────────┘
             │
      Hardware Access

Driver Categories

Storage Drivers

• ATA/ATAPI: IDE drives and CD-ROMs
• AHCI/SATA: Modern SATA controllers
• vDrive: Virtual drive abstraction

Graphics Drivers

• VGA: Text mode (80x25)
• VBE: VESA BIOS Extensions

Input Drivers

• PS/2: Keyboard and mouse
• USB: HID devices (WIP)

System Drivers

• PCI: Device enumeration
• ACPI: Power management
• RTC: Real-time clock

Next Steps

• Driver API - includes SQRM third‑party module SDK
• Storage Drivers - Disk access
• PCI Subsystem - Device discovery