# i440fx PC (`pc-i440fx`, `pc`)

## Peripherals

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

Alternatively:

    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`)