qemu/docs/specs/pci-serial.txt
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   1
   2QEMU pci serial devices
   3=======================
   4
   5There is one single-port variant and two muliport-variants.  Linux
   6guests out-of-the box with all cards.  There is a Windows inf file
   7(docs/qemupciserial.inf) to setup the single-port card in Windows
   8guests.
   9
  10
  11single-port card
  12----------------
  13
  14Name:   pci-serial
  15PCI ID: 1b36:0002
  16
  17PCI Region 0:
  18   IO bar, 8 bytes long, with the 16550 uart mapped to it.
  19   Interrupt is wired to pin A.
  20
  21
  22multiport cards
  23---------------
  24
  25Name:   pci-serial-2x
  26PCI ID: 1b36:0003
  27
  28Name:   pci-serial-4x
  29PCI ID: 1b36:0004
  30
  31PCI Region 0:
  32   IO bar, with two/four 16550 uart mapped after each other.
  33   The first is at offset 0, second at offset 8, ...
  34   Interrupt is wired to pin A.
  35