1The QEMU PC System emulator simulates the following peripherals:
2
3-  i440FX host PCI bridge and PIIX3 PCI to ISA bridge
4
5-  Cirrus CLGD 5446 PCI VGA card or dummy VGA card with Bochs VESA
6   extensions (hardware level, including all non standard modes).
7
8-  PS/2 mouse and keyboard
9
10-  2 PCI IDE interfaces with hard disk and CD-ROM support
11
12-  Floppy disk
13
14-  PCI and ISA network adapters
15
16-  Serial ports
17
18-  IPMI BMC, either and internal or external one
19
20-  Creative SoundBlaster 16 sound card
21
22-  ENSONIQ AudioPCI ES1370 sound card
23
24-  Intel 82801AA AC97 Audio compatible sound card
25
26-  Intel HD Audio Controller and HDA codec
27
28-  Adlib (OPL2) - Yamaha YM3812 compatible chip
29
30-  Gravis Ultrasound GF1 sound card
31
32-  CS4231A compatible sound card
33
34-  PC speaker
35
36-  PCI UHCI, OHCI, EHCI or XHCI USB controller and a virtual USB-1.1
37   hub.
38
39SMP is supported with up to 255 CPUs (and 4096 CPUs for PC Q35 machine).
40
41QEMU uses the PC BIOS from the Seabios project and the Plex86/Bochs LGPL
42VGA BIOS.
43
44QEMU uses YM3812 emulation by Tatsuyuki Satoh.
45
46QEMU uses GUS emulation (GUSEMU32 http://www.deinmeister.de/gusemu/) by
47Tibor \"TS\" Schütz.
48
49Note that, by default, GUS shares IRQ(7) with parallel ports and so QEMU
50must be told to not have parallel ports to have working GUS.
51
52.. parsed-literal::
53
54   |qemu_system_x86| dos.img -device gus -parallel none
55
56Alternatively:
57
58.. parsed-literal::
59
60   |qemu_system_x86| dos.img -device gus,irq=5
61
62Or some other unclaimed IRQ.
63
64CS4231A is the chip used in Windows Sound System and GUSMAX products
65
66The PC speaker audio device can be configured using the pcspk-audiodev
67machine property, i.e.
68
69.. parsed-literal::
70
71   |qemu_system_x86| some.img \
72   -audiodev <backend>,id=<name> \
73   -machine pcspk-audiodev=<name>
74
75Machine-specific options
76~~~~~~~~~~~~~~~~~~~~~~~~
77
78It supports the following machine-specific options:
79
80- ``x-south-bridge=PIIX3|piix4-isa`` (Experimental option to select a particular
81  south bridge. Default: ``PIIX3``)
82