Skip to content

device-type.md

Latest commit

 

History

History
75 lines (67 loc) · 2.28 KB

device-type.md

File metadata and controls

75 lines (67 loc) · 2.28 KB

Device Type Codes

 /-------- Hardware class
 |    /--- Hardware sub-class
 |    |                 /--- vendor unique device ID
---- ----           -------------------
0100 1111 1101 0001 0111 1110 1001 0001
          ---- ||||
           |   |||\-- can generate interrupts
           |   ||\--- reset with 0xffff interrupt supported
           |   |\---- memory mapped
           |   \----- supports extended API
           \--- Hardware class API

Hardware Class API

For every hardware class, there may exist a hardware class API. All devices with the same hardware class and standard API ID can be used in the same generic way.

  • Standard API IDs are 0x0 - 0xD.
  • 0xE means a standard API based on sub-class is used.
  • 0xF means the device does not support standard API

Hardware Classes and Sub-classes

  • 0 - expansion buses
  • 1 - integrated devices
    • 1 - CPU or interrupt controllers
    • 2 - timers
    • 3 - RNG
    • 4 - real time clocks
    • 7 - ROMs and EEPROMs
  • 2 - sensors (input only devices)
  • 3 - human interfacing specific devices
    • 0 - keyboards
    • 1 - Game Controllers
  • 4 - mass storage
    • 0-7 32+ bit addressable
    • 8-F 16 bit addressable
    • 4 - 32 bit, fixed disk drives
    • A - 16 bit, fixed disk drives
    • F - 16 bit, floppy drives
  • 5 - memory controllers
    • 1 DMA
    • 4 non-volatile memory devices
  • 6 - multimedia capture
  • 7 - raster display (2D)
    • 0 - text cell based, command driven, monochrome display
    • 1 - text cell based, memory mapped, monochrome display
    • 2 - text cell based, command driven, color display
    • 3 - text cell based, memory mapped, color display
    • 4 - pixel based, command driven, monochrome display
    • 5 - pixel based, memory mapped, monochrome display
    • 6 - pixel based, command driven, color display
    • 7 - pixel based, memory mapped, color display
    • 8 - pixel based, memory mapped, color/monochrome video card
  • 8 - vector display
    • 2 - 2D vector
    • 3 - 3D holographic
  • 9 - co-processors/other CPUs/microcontrollers
  • A - reserved/future use
  • B - reserved/future use
  • C - generic output only devices
  • D - wireless devices
    • 0 - Packet radio transceivers
  • E - wired network/communication
    • 0 - parallel port
    • 1 - serial port
  • F - non-standard devices
    • 7 - thrust controllers