June 1999		  Kernel Parameters			v2.2.9
			  ~~~~~~~~~~~~~~~~~

The following is a consolidated list of the kernel parameters as defined
in the file init/main.c and sorted into English Dictionary order (defined
as ignoring all punctuation and sorting digits before letters in a case
insensitive manner), and with descriptions where known.

The text in square brackets at the beginning of the description state the
restrictions on the kernel for the said kernel parameter to be valid. The
restrictions referred to are that the relevant option is valid if:

    APIC	APIC support is enabled.
    APM 	Advanced Power Management support is enabled.
    AX25	Appropriate AX.25 support is enabled.
    CD		Appropriate CD support is enabled.
    EIDE	EIDE/ATAPI support is enabled.
    FB		The frame buffer device is enabled.
    HW		Appropriate hardware is enabled.
    ISDN	Appropriate ISDN support is enabled.
    JOY 	Appropriate joystick support is enabled.
    LPT 	Printer support is enabled.
    MCA 	MCA bus support is enabled.
    MDA 	The MDA console is enabled.
    MOUSE	Appropriate mouse support is enabled.
    NET 	Appropriate network support is enabled.
    NFS 	Appropriate NFS support is enabled.
    PARIDE	The ParIDE subsystem is enabled.
    PCI 	PCI bus support is enabled.
    PCMCIA	The PCMCIA subsystem is enabled.
    PNP 	Plug & Play support is enabled.
    PS2 	Appropriate PS/2 support is enabled.
    RAM 	RAMdisc support is enabled.
    SCSI	Appropriate SCSI support is enabled.
    SERIAL	Serial support is enabled.
    SMP 	The kernel is an SMP kernel.
    SOUND	Appropriate sound system support is enabled.
    VGA 	The VGA console has been enabled.
    VT		Virtual terminal support is enabled.
    XT		IBM PC/XT MFM hard disk support is enabled.

In addition, the following text indicates that the option:

    BUGS=	Relates to possible processor bugs on the said processor.
    KNL 	Is a kernel start-up parameter.

Note that ALL kernel parameters listed below are CASE SENSITIVE, and that
a trailing = on the name of any parameter states that that parameter will
be entered as an environment variable, whereas its absence indicates that
it will appear as a kernel argument readable via /proc/cmdline by programs
running once the system is up.

    53c7xx=		[HW,SCSI] Amiga SCSI controllers

    adb_buttons=	[HW,MOUSE]

    advansys=		[HW,SCSI]

    aha152x=		[HW,SCSI]

    aha1542=		[HW,SCSI]

    aic7xxx=		[HW,SCSI]

    AM53C974=		[HW,SCSI]

    apm=		[APM] Advanced Power Management.

    arcrimi=		[HW,NET]

	ataflop=		[HW, M68k]

    atamouse=		[HW,MOUSE] Atari Mouse.

    atascsi=		[HW,SCSI] Atari SCSI.

    aztcd=		[HW,CD] Aztec CD driver.

    baycom_par= 	[HW,AX25] BayCom Parallel Port AX.25 Modem.

    baycom_ser_fdx=	[HW,AX25] BayCom Serial Port AX.25 Modem in Full
			Duplex Mode.

    baycom_ser_hdx=	[HW,AX25] BayCom Serial Port AX.25 Modem in Half
			Duplex Mode.

    bmouse=		[HW,MOUSE,PS2] Bus mouse.

    BusLogic=		[HW,SCSI]

    cdu31a=		[HW,CD]

    cm206=		[HW,CD]

    com20020=		[HW,NET]

    com90io=		[HW,NET]

    com90xx=		[HW,NET]

    console=		[KNL] output console + comm spec (speed, control, parity)

    cyclades=		[HW,SERIAL] Cyclades multi-serial port adapter.

    debug		[KNL] Enable kernel debugging (events log level).

    decnet=		[HW,NET]

    digi=		[HW,SERIAL] io parameters + enable/disable command

    digiepca=		[HW,SERIAL]

    dmascc=		[HW,AX25,SERIAL] AX.25 Z80SCC driver with DMA
			support available.

    dmasound=		[HW,SOUND] (sound subsystem buffers)

    dtc3181e=		[HW,SCSI]

    eata=		[HW,SCSI]

    eda=		[HW,PS2]

    edb=		[HW,PS2]

    ether=		[HW,NET] Ethernet cards parameters (iomem,irq,dev_name).

    fd_mcs=		[HW,SCSI]

    fdomain=		[HW,SCSI]

    floppy=		[HW]

    ftape=		[HW] Floppy Tape subsystem debugging options.

    gdth=		[HW,SCSI]

    gscd=		[HW,CD]

    gvp11=		[HW,SCSI]

    hd= 		[EIDE] (E)IDE hard drive subsystem
                geometry (Cyl/heads/sectors) or tune parameters.

    hfmodem=		[HW,AX25]

    HiSax=		[HW,ISDN]

    hisax=		[HW,ISDN]

    ibmmcascsi= 	[HW,MCA,SCSI] IBM MicroChannel SCSI adapter.

    icn=		[HW,ISDN]

	ide?=		[HW] (E)IDE subsystem : config (iomem/irq), tuning or
                     debugging (serialize,reset,no{dma,tune,probe}) or
					chipset specific parameters

	idebus=		[HW] (E)IDE subsystem : VLB/PCI bus speed

    in2000=		[HW,SCSI]

    init=		[KNL]

	initrd=		[KNL] initial ramdisk path

    ip= 		[PNP]

    isp16=		[HW,CD]

    js_14=		[HW,JOY]

    js_am=		[HW,JOY]

    js_an=		[HW,JOY]

    js_as=		[HW.JOY]

    js_console= 	[HW,JOY]

    js_console2=	[HW,JOY]

    js_console3=	[HW,JOY]

    js_db9=		[HW,JOY]

    js_db9_2=		[HW,JOY]

    js_db9_3=		[HW,JOY]

    js_tg=		[HW,JOY]

    js_tg_2=		[HW,JOY]

    js_tg_3=		[HW,JOY]

    kbd-reset		[VT]

    load_ramdisk=	[RAM] initrd loading boolean

    lp= 		[LPT] Parallel Printer.

    ltpc=		[HW]

    mac5380=		[HW,SCSI]

    maxcpus=		[SMP] States the maximum number of processors that
			an SMP kernel should make use of.

    max_scsi_luns=	[SCSI]

    mca-pentium 	[BUGS=ix86]

    mcd=		[HW,CD]

    mcdx=		[HW,CD]

    md= 		[HW] RAID subsystems devices and level

    mdacon=		[MDA]

    msmouse=		[HW,MOUSE] Microsoft Mouse.

    ncr5380=		[HW,SCSI]

    ncr53c400=		[HW,SCSI]

    ncr53c400a= 	[HW,SCSI]

    ncr53c406a= 	[HW,SCSI]

    ncr53c8xx=		[HW,SCSI]

    nfsaddrs=		[NFS]

    nfsroot=		[NFS]

	nmi_watchdog=	[KNL, BUGS=ix86] debugging features for SMP kernels

    no387		[BUGS=ix86] Tells the kernel to use the 387 maths
			emulation library even if a 387 maths coprocessor
			is present.

    noapic		[SMP,APIC] Tells the kernel not to make use of any
			APIC that may be present on the system.

    noasync		[HW, M68K] Disables async and sync negotiation for all devices.

    nodisconnect	[HW,SCSI, M68K] Disables SCSI disconnects.

    no-halt		[BUGS=ix86]

    noinitrd		[RAM] Tells the kernel not to load any configured
			initial ramdisc.

    no-scroll		[VGA]

    nosmp		[SMP] Tells an SMP kernel to act as a UP kernel.

    nosync		[HW, M68K] Disables sync negotiation for all devices.

    optcd=		[HW,CD]

    panic=		

    parport=		[HW,LP]

    pas16=		[HW,SCSI]

    pcbit=		[HW,ISDN]

    pcd.		[PARIDE]

    pci=		[PCI]

    pd. 		[PARIDE]

    pf. 		[PARIDE]

    pg. 		[PARIDE]

    pirq=		[SMP,APIC] mp-table

    plip=		[LP,NET] Parallel port network link.

    profile=

    prompt_ramdisk=	[RAM] Whether to prompt for ramdisk before loading
			its contents into memory.

    pt. 		[PARIDE]

    ramdisk=		[RAM]

    ramdisk_size=	[RAM]

    ramdisk_start=	[RAM] offset of the initrd image when cohabiting with
					a kernel image on a floppy

    reboot=		[BUGS=ix86]

    reserve=

    riscom8=		[HW,SERIAL] multi-port serial driver (io parameters)

    ro			[KNL] Mount root device read-only on boot.

    root=		

    rw			[KNL] Mount root device read-write on boot.

    sbpcd=		[HW,CD] Soundblaster CD adapter.

    scsi_logging=	[SCSI]

    sjcd=		[HW,CD]

    sonycd535=		[HW,CD]

    sound=		[SOUND]

    soundmodem= 	[HW,AX25,SOUND] Sound cards used as AX.25 modems.

    specialix=		[HW,SERIAL] Specialix multi-serial port adapter.

    st= 		[HW] SCSI tape parameters (buffers, ..)

    st0x=		[HW,SCSI]

    stram_swap= 	[HW]

    switches=		[HW, M68K]

    sym53c416=		[HW,SCSI]

    sym53c8xx=		[HW,SCSI]

    t128=		[HW,SCSI]

    tmc8xx=		[HW,SCSI]

    tmscsim=		[HW,SCSI]

    tp720=		[HW,PS2]

    u14-34f=		[HW,SCSI]

    video=		[FB]

    wd33c93=		[HW,SCSI]

    wd7000=		[HW,SCSI]

    wdt=		[HW]

    xd= 		[HW,XT] Original XT 8bit disk controllers

    xd_geo=		[HW,XT]