Specifications

floppy=0,daring Tells the floppy driver that your floppy controller should be used with caution
(disables all daring operations).
floppy=thinkpad Tells the floppy driver that you have a Thinkpad. Thinkpads use an inverted
convention for the disk change line.
floppy=nodma Tells the floppy driver not to use DMA for data transfers. This is needed on HP
Omnibooks, which don't have a workable DMA channel for the floppy driver. This option is also useful if you
frequently get `Unable to allocate DMA memory' messages. Use of `nodma' is not recommended if you have a
FDC without a FIFO (8272A or 82072). 82072A and later are OK). The FDC model is reported at boot. You
also need at least a 486 to use nodma.
floppy=nofifo Disables the FIFO entirely. This is needed if you get `Bus master arbitration error'
messages from your Ethernet card (or from other devices) while accessing the floppy.
floppy=broken_dcl Don't use the disk change line, but assume that the disk was changed whenever the
device node is reopened. Needed on some boxes where the disk change line is broken or unsupported. This
should be regarded as a stopgap measure, indeed it makes floppy operation less efficient due to unneeded
cache flushings, and slightly more unreliable. Please verify your cable connection and jumper settings if you
have any DCL problems. However, some older drives, and also some Laptops are known not to have a DCL.
floppy=debug Print (additional) debugging messages.
floppy=messages Print informational messages for some operations (disk change notifications, warnings
about over and underruns, and about autodetection).
11.3 The Bus Mouse Driver (`bmouse=')
The busmouse driver only accepts one parameter, that being the hardware IRQ value to be used.
11.4 The MS Bus Mouse Driver (`msmouse=')
The MS mouse driver only accepts one parameter, that being the hardware IRQ value to be used.
11.5 The Printer Driver (`lp=')
With this boot argument you can tell the printer driver what ports to use and what ports not to use. The latter
comes in handy if you don't want the printer driver to claim all available parallel ports, so that other drivers
(e.g. PLIP, PPA) can use them instead.
The format of the argument is multiple i/o, IRQ pairs. For example, lp=0x3bc,0,0x378,7 would use the
port at 0x3bc in IRQ−less (polling) mode, and use IRQ 7 for the port at 0x378. The port at 0x278 (if any)
would not be probed, since autoprobing only takes place in the absence of a lp= argument. To disable the
printer driver entirely, one can use lp=0.
11.6 The Parallel port IP driver (`plip=')
Using plip=timid will tell the plip driver to avoid any ports that appear to be in use by other parallel port
devices. Otherwise you can use plip=parportN where N is a non−zero integer indicating the parallel port
The Linux BootPrompt−HowTo
11.3 The Bus Mouse Driver (`bmouse=') 30