HP(1)                INTERACTIVE UNIX System                HP(1)



          NAME
               hp - handle special functions of Hewlett-Packard terminals

          SYNOPSIS
               hp [ -e ] [ -m ]

          DESCRIPTION
               hp supports special functions of the Hewlett-Packard 2640
               series of terminals, with the primary purpose of producing
               accurate representations of most nroff output.  A typical
               usage is in conjunction with DOCUMENTER'S WORKBENCH
               Software:

                    nroff -h files ... | hp

               Regardless of the hardware options on your terminal, hp
               tries to do sensible things with underlining and reverse
               line-feeds.  If the terminal has the "display enhancements"
               feature, subscripts and superscripts can be indicated in
               distinct ways.  If it has the "mathematical-symbol" feature,
               Greek and other special characters can be displayed.

               The flags are as follows:

               -e   It is assumed that your terminal has the "display
                    enhancements" feature, and so maximal use is made of
                    the added display modes.  Overstruck characters are
                    presented in the Underlined mode.  Superscripts are
                    shown in Half-bright mode, and subscripts in Half-
                    bright, Underlined mode.  If this flag is omitted, hp
                    assumes that your terminal lacks the "display enhance-
                    ments" feature.  In this case, all overstruck charac-
                    ters, subscripts, and superscripts are displayed in
                    Inverse Video mode, i.e., dark-on-light, rather than
                    the usual light-on-dark.
               -m   Requests minimization of output by removal of new-
                    lines.  Any contiguous sequence of 3 or more new-lines
                    is converted into a sequence of only 2 new-lines; i.e.,
                    any number of successive blank lines produces only a
                    single blank output line.  This allows you to retain
                    more actual text on the screen.

               With regard to Greek and other special characters, hp pro-
               vides the same set as does 300(1), except that "not" is
               approximated by a right arrow, and only the top half of the
               integral sign is shown.

          DIAGNOSTICS
               line too long if the representation of a line exceeds 1,024
               characters.
               The exit codes are 0 for normal termination, 2 for all
               errors.



          Rev. Extended Terminal Interface                           Page 1

          HP(1)                INTERACTIVE UNIX System                HP(1)



          SEE ALSO
               300(1), greek(1).

          BUGS
               An "overstriking sequence" is defined as a printing charac-
               ter followed by a backspace followed by another printing
               character.  In such sequences, if either printing character
               is an underscore, the other printing character is shown
               underlined or in Inverse Video; otherwise, only the first
               printing character is shown (again, underlined or in Inverse
               Video).  Nothing special is done if a backspace is adjacent
               to an ASCII control character.  Sequences of control charac-
               ters (e.g., reverse line-feeds, backspaces) can make text
               "disappear"; in particular, tables generated by tbl(1) that
               contain vertical lines will often be missing the lines of
               text that contain the "foot" of a vertical line, unless the
               input to hp is piped through col(1).

               Although some terminals do provide numerical superscript
               characters, no attempt is made to display them.



































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