i440fx PC (pc-i440fx, pc)


The QEMU PC System emulator simulates the following peripherals:

  • i440FX host PCI bridge and PIIX3 PCI to ISA bridge

  • Cirrus CLGD 5446 PCI VGA card or dummy VGA card with Bochs VESA extensions (hardware level, including all non standard modes).

  • PS/2 mouse and keyboard

  • 2 PCI IDE interfaces with hard disk and CD-ROM support

  • Floppy disk

  • PCI and ISA network adapters

  • Serial ports

  • IPMI BMC, either and internal or external one

  • Creative SoundBlaster 16 sound card

  • ENSONIQ AudioPCI ES1370 sound card

  • Intel 82801AA AC97 Audio compatible sound card

  • Intel HD Audio Controller and HDA codec

  • Adlib (OPL2) - Yamaha YM3812 compatible chip

  • Gravis Ultrasound GF1 sound card

  • CS4231A compatible sound card

  • PC speaker

  • PCI UHCI, OHCI, EHCI or XHCI USB controller and a virtual USB-1.1 hub.

SMP is supported with a large number of virtual CPUs (upper limit is configuration dependent).

QEMU uses the PC BIOS from the Seabios project and the Plex86/Bochs LGPL VGA BIOS.

QEMU uses YM3812 emulation by Tatsuyuki Satoh.

QEMU uses GUS emulation (GUSEMU32 http://www.deinmeister.de/gusemu/) by Tibor "TS" Schütz.

Note that, by default, GUS shares IRQ(7) with parallel ports and so QEMU must be told to not have parallel ports to have working GUS.

qemu-system-x86_64 dos.img -device gus -parallel none


qemu-system-x86_64 dos.img -device gus,irq=5

Or some other unclaimed IRQ.

CS4231A is the chip used in Windows Sound System and GUSMAX products

The PC speaker audio device can be configured using the pcspk-audiodev machine property, i.e.

qemu-system-x86_64 some.img -audiodev <backend>,id=<name> -machine pcspk-audiodev=<name>

Machine-specific options

It supports the following machine-specific options:

  • x-south-bridge=PIIX3|piix4-isa (Experimental option to select a particular south bridge. Default: PIIX3)