lptcontrol(8) [freebsd man page]

LPTCONTROL(8)						    BSD System Manager's Manual 					     LPTCONTROL(8)

NAME

     lptcontrol -- a utility for manipulating the lpt printer driver

SYNOPSIS

     lptcontrol -e | -i | -p | -s [-d control_device]

DESCRIPTION

     The lptcontrol utility is used to set either the interrupt-driven, extended, standard, or polling mode of individual lpt(4) devices.  When a
     printer is switched from a mode to another, this change will only take effect the next time the device is opened.

     Extended mode is anything the parallel port interface can support.  For an ECP/ISA parallel port, it may be FIFO+DMA or ECP.

     The following command line options are supported:

     -e      Turn on extended mode.

     -i      Turn on interrupt-driven mode.

     -p      Turn on polled mode.

     -s      Turn on standard mode, i.e., turn off extended mode.

     -d control_device
	     Set the mode of the printer control device specified by control_device.  The default value for control_device is /dev/lpt0.ctl.

     One of -e, -i, -p or -s must be specified.

FILES

     /dev/lpt?		     printer devices
     /dev/lpt?.ctl	     printer control devices
     /sys/i386/conf/GENERIC  kernel configuration file
     /boot/device.hints      device hints for the parallel port chipset driver, ppc(4)

SEE ALSO

     lpt(4), ppc(4), device.hints(5)

HISTORY

     The lptcontrol utility first appeared in FreeBSD 1.1.5

AUTHORS

     Geoffrey M. Rehmet

BUGS

     The control device name should never have been an option, but should have been an optional argument.  Because of this, a single argument is
     treated as a device name.

BSD
								  October 1, 2004							       BSD

LPT(4)							   BSD Kernel Interfaces Manual 						    LPT(4)

NAME

     lpt -- generic printer device driver

SYNOPSIS

     device ppc
     device ppbus
     device lpt

DESCRIPTION

     The current lpt driver is the port of the original lpt driver to the ppbus(4) system.

     One purpose of this port was to allow parallel port sharing with other parallel devices.  Secondly, inb()/outb() calls have been replaced by
     ppbus function calls.  lpt is now arch-independent thanks to the ppbus interface.	See ppbus(4) for more info about the ppbus system.

     The parallel port bus is allocated by lpt when the printer device is opened and released only when the transfer is completed: either when the
     device is closed or when the entire buffer is sent in interrupt driven mode.

     The driver can be configured to be either interrupt-driven, or to poll the printer.  Ports that are configured to be interrupt-driven can be
     switched to polled mode by using the lptcontrol(8) command.

     Depending on your hardware, extended capabilities may be configured with the lptcontrol(8) command.  With an ECP/ISA port, you can take
     advantage of FIFO and DMA.

     In order to retrieve printer info from /dev/lpt0, just apply the cat command to the device.  If the printer supports IEEE1284 nibble mode and
     has data to send to the host, you will get it.

FILES

     /dev/lpt0			       first parallel port driver

SEE ALSO

     ppbus(4), ppc(4), lptcontrol(8)

HISTORY

     This driver replaces the functionality of the lpa driver, which is now defunct.

BUGS

     There are lots of them, especially in cheap parallel port implementations.

     It is only possible to open a lpt port when a printer is connected and on-line, making it impossible to run lptcontrol(8) when there is no
     printer connected.

     This driver could still stand a rewrite.

BSD
								 February 14, 1999							       BSD