| ACPI | ACPI | PIIX4 ACPI controller |
| apic0 | APIC0 | APIC of first CPU |
| BIOS | BIOS | System BIOS |
| busmouse | BUSM | Busmouse |
| BXVGA | BXVGA | VGA adapter with VBE support |
| CD1 | CD1 | Lowlevel CD-ROM support for the first device (if configured, there can be CD2, CD3, CD4, ...) |
| cirrus | CLVGA | Cirrus SVGA |
| CMOS | CMOS | CMOS RAM + RTC |
| cpu0 | CPU0 | First CPU (SMP emulation can have cpu1, cpu2, cpu3,...) |
| devices | DEV | Devices subsystem |
| DMA | DMA | DMA controller |
| E1000 | E1000 | Intel(R) Gigabit Ethernet |
| es1370 | E1370 | ES1370 soundcard |
| extfpuirq | EFIRQ | External FPU IRQ |
| floppy | FDD | Floppy controller |
| gameport | GAME | Standard PC gameport |
| GDBST | GDBST | GDB stub support |
| GUI | GUI | Generic GUI code |
| harddrv | HD | IDE HD/CD emulation |
| hdimage | IMG | Disk image support |
| ioapic | IOAP | I/O APIC |
| iodebug | IODBG | I/O interface to debugger |
| keyboard | KBD | PS/2 keyboard and mouse |
| keymap | KMAP | Keyboard mapping |
| logio | IO | Bochs logging subsystem |
| memory | MEM0 | Memory management |
| MGUI | MGUI | MacOS9 / MacOSX gui |
| NE2K | NE2K | NE2000 ethernet adapter |
| NGUI | NGUI | GUI without input/output interface ("nogui") |
| parallel | PAR | Parallel port support |
| PCI | PCI | i440FX PCI bridge |
| pci2isa | P2I | PCI-to-ISA bridge |
| pcidev | PCI2H | Host PCI device mapping |
| pcipnic | PNIC | PCI pseudo NIC |
| pci_ide | PIDE | PCI IDE controller |
| pc_system | SYS | CPU-to-devices interface and timing control |
| PIC | PIC | Programmable interrupt controller |
| PIT | PIT | I/O interface for 82C54 timer |
| pit82c54 | PIT81 | 82C54 timer core |
| PLGIN | PLGIN | Plugin interface |
| RFB | RFB | RFB gui |
| SB16 | SB16 | SB16 soundcard |
| SCSIC | SCSIC | SCSI CD-ROM emulation for USB |
| SCSID | SCSID | SCSI hard drive emulation for USB |
| SDL | SDL | SDL gui |
| serial | SER | Serial port emulation |
| serial_raw | SERR | Lowlevel serial port support |
| siminterface | CTRL | Simulator interface |
| slowdown_timer | STIME | Slowdown timer |
| speaker | SPEAK | Lowlevel support for the PC speaker |
| SVGA | SVGA | SVGA gui |
| TGUI | TGUI | Term gui |
| unmappped | UNMP | Unmapped I/O handler |
| usb_hid | USBHI | USB HID device emulation |
| usb_hub | USBHB | External USB hub emulation |
| usb_msd | USBMS | USB MSD (disk/cdrom) emulation |
| usb_ohci | OHCI | USB OHCI controller |
| usb_printer | USBPR | USB printer emulation |
| usb_uhci | UHCI | USB UHCI controller |
| usb_xhci | XHCI | USB xHCI controller |
| VGA | VGA | Standard VGA |
| vgabios | VBIOS | VGA BIOS |
| virt_timer | VTIME | Virtual timer |
| WGUI | WGUI | WIN32 gui |
| WX | WX | wxWidgets gui |
| XGUI | XGUI | X11 gui |