HC(4)                   COMMAND REFERENCE                   HC(4)



NAME
     hc - hard copy interface for workstations

DESCRIPTION
     Hc provides the interface to any Centronics type parallel
     interface devices such as line printers, hard copy units,
     plotters or other output devices.  When the device is opened
     or closed, no page ejects are generated.

     Four styles of interface are provided.  The number in
     parentheses indicates the minor number associated with each
     one for the first interface in slot.  For slots with a
     second hardcopy interface add one to the given number.

     hc   (0) passes data through with no change.

     uhc  (2) folds the normal 96-character set into a 64-
          character set, mapping lower case characters into upper
          case.

     chc  (4) inserts a carriage return before each newline
          (linefeed) character.

     uchc (6) both folds the character set and inserts carriage
          returns.

     An ioctl call is also available to change the device
     operating mode after it is open.  The request value of the
     call is the same as the minor numbers given above.

     The driver does not interpret any control characters.  It
     also does not make any assumptions about form width, form
     length, tab stop positions, etc.

FILES
     /dev/hc
     /dev/uhc
     /dev/chc
     /dev/uchc

DIAGNOSTICS
     ENXIO, EBUSY, EIO, ENOTTY

SEE ALSO
     lpr(1), ioctl(2), and mknod(8).










Printed 4/6/89                                                  1

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na:192,93;
de:285,1484;
fi:1769,161;
di:1930,154;
se:2084,155;
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