ik(7)

NAME
     ik - Ikon 10088 (ikc) parallel interface controller

SYNOPSIS
     /dev/cent
     /dev/vp0

DESCRIPTION
     This is the driver for the Ikon 10088 (and 10088A) parallel interface
     controller.  The controller can support any one of three possible
     interfaces:  Versatec TTL, Versatec differential, or (Tektronix-
     compatible) Centronics.  The Ikon controller board must be jumpered,
     switched, connected, and terminated differently depending on which
     interface is being used.

     If the board is configured for the Centronics interface, bytes written to
     /dev/cent are output to the parallel port.  A printer reset (input prime)
     is issued when the device file is opened.

     If the board is configured for either Versatec interface, bytes written
     to /dev/vp0 are output to the parallel port.  A printer reset is issued
     when the device file is opened.  In addition, the following Versatec
     control calls are provided via ioctl(2).  The relevant definitions are
     contained in the include file <sys/vcmd.h>.

     ioctl(fd,VSETSTATE,int_3_ptr);
          changes the Versatec device state according to the contents of the 3
          integers pointed at by int_3_ptr.  The first integer specifies a
          Versatec command:
          VPRINT commands the Versatec device to enter print mode;
          VPLOT commands it to enter plot mode;
          VPRINTPLOT commands it to enter simultaneous print/plot mode;
          VLF commands it to output a linefeed;
          VFF commands it to output a formfeed;
          VREOT drives the remote EOT signal.
          The second integer specifies a timeout delay (in seconds) for
          subsequent Versatec operations, including output operations.  A
          specified delay of 0 is ignored.  The default delay is 300 seconds.
          This may be insufficient for large and / or slow devices.  The third
          integer is ignored.

     ioctl(fd,VGETSTATE,int_3_ptr);
          passes back Versatec device state information in the 3 integers
          pointed at by int_3_ptr.  The first integer contains:
          VPRINT if the Versatec device is in print mode;
          VPLOT if it is in plot mode;
          VPRINTPLOT if it is in simultaneous print/plot mode.
          The second integer contains the current timeout delay (in seconds)
          (see VSETSTATE above).  The third integer is not used.
     It is normally unnecessary to use /dev/cent or /dev/vp0 directly; the
     spooling software (see lp(1)) provides an adequate interface.

FILES
     /dev/cent
     /dev/vp0

SEE ALSO
     image(4), ipaste(1), lp(1), snap(1)