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Annotation of coherent/a/usr/man/COHERENT/printer, revision 1.1

1.1     ! root        1: 
        !             2: 
        !             3: printer               Technical Information               printer
        !             4: 
        !             5: 
        !             6: 
        !             7: 
        !             8: The printer  is the device that  transfers human-readable data to
        !             9: paper.   It can  be plugged  into either a  parallel or  a serial
        !            10: port, depending upon how your printer is designed.  The former is
        !            11: faster, whereas  the latter permits the  printer to be positioned
        !            12: farther  away  from  the  computer.  The  following  descriptions
        !            13: assume that you have your printer plugged into a parallel port.
        !            14: 
        !            15: COHERENT permits  you to have up to three  parallel ports on your
        !            16: computer.  Devices  /ddeevv/llpptt11, /ddeevv/llpptt22, and  /ddeevv/llpptt33 control,
        !            17: respectively, parallel  ports 1,  2, and  3 in cooked  mode.  The
        !            18: device /ddeevv/llpp  is normally linked  to the above  device that you
        !            19: wish to  use by  default as your  line printer.  See  the Lexicon
        !            20: article llpp for more details on these devices.
        !            21: 
        !            22: COHERENT can  print text  on all  ``dumb'' printers that  have no
        !            23: special   text-formatting  features.    It  also   supports  text
        !            24: formatting on three  varieties of printers: Epson-compatible dot-
        !            25: matrix  printers;  laser printers  compatible  with the  Hewlett-
        !            26: Packard LaserJet  family of printers that  implement the Hewlett-
        !            27: Packard Page  Control Language (PCL); and  all printers that have
        !            28: implemented the PostScript language.
        !            29: 
        !            30: ***** Dumb Printers *****
        !            31: 
        !            32: To print  on a ``dumb''  printer plugged into  the parallel port,
        !            33: use the command llpprr.   This command performs some formatting on a
        !            34: file, and  invokes the line-printer daemon llppdd  to spool the file
        !            35: for printing.   Using the line-printer  daemon is necessary  in a
        !            36: multi-user  environment  to   ensure  that  print  requests  from
        !            37: different users  do not arrive  at the printer at  the same time,
        !            38: causing  the  printer to  output  a jumbled  mess  (if it  prints
        !            39: anything at all).
        !            40: 
        !            41: For example, if FFOOOO is a text file, the command
        !            42: 
        !            43: 
        !            44:         lpr FOO
        !            45: 
        !            46: 
        !            47: prints it  on your dumb printer.  You should  use the llpprr command
        !            48: to  print  ``simple''  text (such  as  program  listings) on  any
        !            49: variety of dot-matrix printer.  To print listings or other simple
        !            50: text on a laser printer, see below.
        !            51: 
        !            52: The  output of  the  text-formatting command  nnrrooffff  can also  be
        !            53: printed, with  some success, on  dumb printers.  To  represent an
        !            54: italicized  character, it  prints  the character,  followed by  a
        !            55: backspace, followed  by an  underscore character; to  represent a
        !            56: bold-face  character,  it output  the  character,  followed by  a
        !            57: backspace, followed by  the character again (in the hope, perhaps
        !            58: naive, that  presenting the same  text twice will  make it appear
        !            59: bolder).
        !            60: 
        !            61: 
        !            62: 
        !            63: 
        !            64: COHERENT Lexicon                                           Page 1
        !            65: 
        !            66: 
        !            67: 
        !            68: 
        !            69: printer               Technical Information               printer
        !            70: 
        !            71: 
        !            72: 
        !            73: ***** Epson-Compatible Printers *****
        !            74: 
        !            75: The command eeppssoonn massages text into a form that uses some of the
        !            76: text-formatting features  of the  Epson MX-80 printer  and clones
        !            77: thereof.  It  is especially  to be used  with text that  has been
        !            78: formatted  with nnrrooffff,  as described above;  there, it  turns the
        !            79: ``character/backspace/character'' sequence  into the Epson escape
        !            80: sequences for  emphasized text and italics.   It then directs its
        !            81: output to  the line-printer device /ddeevv/llpp,  which it assumes has
        !            82: an Epson-style printer plugged into it.
        !            83: 
        !            84: The following  example uses nnrrooffff  to format file  FFOOOO and prints
        !            85: the output on an Epson-style printer:
        !            86: 
        !            87: 
        !            88:         nroff -ms FOO | epson
        !            89: 
        !            90: 
        !            91: ***** LaserJet-style Printers *****
        !            92: 
        !            93: COHERENT  includes  a  large suite  of  commands  to support  the
        !            94: Hewlett-Packard LaserJet  family of  printers, as well  as clones
        !            95: that run Hewlett-Packard's PCL.
        !            96: 
        !            97: To begin, these commands use the HP devices /ddeevv/hhpp and /ddeevv/rrhhpp.
        !            98: When you installed COHERENT  on your system, you may have created
        !            99: these devices; if you did not, however, you should create them by
        !           100: simply using  the command  llnn to link  /ddeevv/llpp to /ddeevv/hhpp  and to
        !           101: link /ddeevv/rrllpp to /ddeevv/rrhhpp, as follows:
        !           102: 
        !           103: 
        !           104:         ln /dev/lp  /dev/hp
        !           105:         ln /dev/rlp /dev/rhp
        !           106: 
        !           107: 
        !           108: You must log in as the superuser rroooott to execute these commands.
        !           109: 
        !           110: The daemon hhppdd spools files  to be printed on your laser printer.
        !           111: It works like the line-printer daemon llppdd, as described above.
        !           112: 
        !           113: The command  hhpp prepares files to be printed  on a laser printer.
        !           114: You should  use it  to prepare  ``simple'' text, such  as program
        !           115: listings, for  printing on your laser  printer.  Like the command
        !           116: eeppssoonn, hhpp also massages the output of nnrrooffff into PCL-style escape
        !           117: sequences; unlike eeppssoonn, however, it does not automatically spool
        !           118: the file for printing.
        !           119: 
        !           120: The command  hhpprr spools files  to be printed on  a laser printer.
        !           121: It works  like the command llpprr, except that  it includes a number
        !           122: of  special features;  for example,  you can  use it  to download
        !           123: LaserJet ``soft fonts'' into your printer.
        !           124: 
        !           125: The following command uses  nnrrooffff to format file FFOOOO, then prints
        !           126: on a Hewlett-Packard style laser printer:
        !           127: 
        !           128: 
        !           129: 
        !           130: COHERENT Lexicon                                           Page 2
        !           131: 
        !           132: 
        !           133: 
        !           134: 
        !           135: printer               Technical Information               printer
        !           136: 
        !           137: 
        !           138: 
        !           139: 
        !           140:         nroff -ms FOO | hp | hpr -B
        !           141: 
        !           142: 
        !           143: Note  that the  -BB option  to  hhpprr suppresses  the printing  of a
        !           144: banner page.
        !           145: 
        !           146: The  text-formatting  command  ttrrooffff  can  create  proportionally
        !           147: spaced text to be printed  on either a PCL or PostScript printer.
        !           148: In PCL mode,  ttrrooffff can make full use of  all ``soft fonts'' that
        !           149: you have loaded onto  your printer.  For example, this manual was
        !           150: printed by  COHERENT ttrrooffff in PCL  mode driving a Hewlett-Packard
        !           151: LaserJet III with soft fonts.  See the Lexicon for details on how
        !           152: to use ttrrooffff with laser printers.
        !           153: 
        !           154: ***** PostScript Printers *****
        !           155: 
        !           156: COHERENT includes  two commands  that can drive  PostScript style
        !           157: printers, such as the Apple LaserWriter.
        !           158: 
        !           159: The command pprrppss is  a PostScript version of the COHERENT command
        !           160: pprr.  It paginates  text,  and supplies  each page  with a  simple
        !           161: header.  See its Lexicon entry for details.
        !           162: 
        !           163: As noted  above, ttrrooffff, the  COHERENT text formatter,  can create
        !           164: proportionally space text  for either PCL or PostScript printers.
        !           165: In PostScript mode, ttrrooffff  can handle all 35 fonts available with
        !           166: most  PostScript cartridges;  it supports  full font  scaling and
        !           167: features such as outlining and shadowing.  It also permits you to
        !           168: embed ``raw'' PostScript  within your file, to create effects not
        !           169: already available  with the ttrrooffff  text-formatting language.  For
        !           170: details on using ttrrooffff with PostScript printers, see its entry in
        !           171: the Lexicon.
        !           172: 
        !           173: ***** Printer Problems *****
        !           174: 
        !           175: The  following paragraphs  describes the  problems  most commonly
        !           176: encountered with printers, and suggests some solutions.
        !           177: 
        !           178: If you  are trying to access your  parallel interface printer via
        !           179: special files  /ddeevv/llpp or /ddeevv/llpptt11 and  receive an error message
        !           180: of the form
        !           181: 
        !           182: 
        !           183:         cannot open device /dev/lp
        !           184: 
        !           185: 
        !           186: this means  that your printer is not attached  to the device that
        !           187: COHERENT  associates with  /ddeevv/llpptt11. Your  printer is  at either
        !           188: attached to /ddeevv/llpptt22 or to /ddeevv/llpptt33. To discover which one, log
        !           189: in as the superuser rroooott and use ccdd to enter directory /ddeevv. Make
        !           190: sure that  your printer  is plugged  in, turned on,  and on-line;
        !           191: then enter the command:
        !           192: 
        !           193: 
        !           194: 
        !           195: 
        !           196: COHERENT Lexicon                                           Page 3
        !           197: 
        !           198: 
        !           199: 
        !           200: 
        !           201: printer               Technical Information               printer
        !           202: 
        !           203: 
        !           204: 
        !           205: 
        !           206:         cat _f_i_l_e > lpt2
        !           207: 
        !           208: 
        !           209: _f_i_l_e  can   be  any  readable   file  that  you   specify  (e.g.,
        !           210: /eettcc/ppaasssswwdd). If  your printer does  not print _f_i_l_e,  then repeat
        !           211: the command for device /ddeevv/llpptt33:
        !           212: 
        !           213: 
        !           214:         cat _f_i_l_e > lpt3
        !           215: 
        !           216: 
        !           217: The  command that  works  indicates the  device  into which  your
        !           218: printer is plugged.
        !           219: 
        !           220: The final step is to  ``link'' the actual location of the printer
        !           221: to devices  /ddeevv/llpp and /ddeevv/rrllpp, so  that the COHERENT utilities
        !           222: know how to print a file.  Enter the appropriate commands:
        !           223: 
        !           224: 
        !           225:         ln -f lpt2  lp
        !           226:         ln -f rlpt2 rlp
        !           227: 
        !           228: 
        !           229: if your printer is attached to /ddeevv/llpptt22, or
        !           230: 
        !           231: 
        !           232:         ln -f lpt3  lp
        !           233:         ln -f rlpt3 rlp
        !           234: 
        !           235: 
        !           236: if your printer was attached to /ddeevv/llpptt33.
        !           237: 
        !           238: If you  have an  Hewlett-Packard LaserJet or  compatible printer,
        !           239: perform the above  ``link'' operation again but substitute hhpp for
        !           240: llpp and  rrhhpp for  rrllpp. This  allows the command  hhpprr to  find your
        !           241: printer.
        !           242: 
        !           243: If you are using a serial printer, note that flow control via CTS
        !           244: (clear-to-send) is not  supported in the ccoomm11 through ccoomm44 family
        !           245: of devices, but is  available in devices hhss0000rr through hhss0077rr. See
        !           246: Lexicon articles ccoomm, hhss, and tteerrmmiinnaall for details.
        !           247: 
        !           248: ***** See Also *****
        !           249: 
        !           250: eeppssoonn, hhpp,  hhppdd, hhpprr, llpp, llppdd,  llpprr, pprrppss, tteecchhnniiccaall iinnffoorrmmaattiioonn,
        !           251: ttrrooffff
        !           252: 
        !           253: 
        !           254: 
        !           255: 
        !           256: 
        !           257: 
        !           258: 
        !           259: 
        !           260: 
        !           261: 
        !           262: COHERENT Lexicon                                           Page 4
        !           263: 
        !           264: 

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