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-
- Read_Me file for Hewlett-Packard printers.
- ------------------------------------------
-
- The HP.DJ500C printer definition file is for use
- with the HP DeskJet 500C, the HP PaintJet XL300
- and the HP DeskJet 1200C. Note that if you have
- got the HP DeskJet 1200C/PS (ie the PostScript
- add-on for the 1200C), you should use the
- PostScript printer driver instead and enable the
- colour option in the configuration window).
-
- The HP.DJ550C printer definition file is for use
- with the HP DeskJet 550C. It may work with the HP
- PaintJet XL300, in which case it is preferrable to
- the HP.DJ500C file due to 4 ink colour processing.
-
- The HP.DeskJet file is for use with HP DeskJet
- printers and similar compatibles.
-
- The HP.DeskJet+ file is for use with HP DeskJet
- Plus printers and similar compatibles eg. Olivetti
- JP 150 and JP 350, HP DeskJet Professional, HP
- DeskJet 500, HP DeskJet 510, etc.
-
- The HP.PaintJet file is for use with the HP
- PaintJet, PaintJet XL and other PaintJet
- compatible printers, eg Integrex ColourJet 2000.
- This file should NOT be used with the PaintJet
- XL300 and XL330 printers.
-
- The HP.LasJet-II printer definition file is for
- use with the HP LaserJet II printers.
-
- The HP.LasJet-III file is for use with HP LaserJet
- series III printers and similar compatibles eg.
- Star LaserPrinter 4, Star LaserPrinter 8III, HP
- LaserJet IIP.
-
- The HP.LasJet-4 file is for use with the HP
- LaserJet 4 series printers, including the HP
- LaserJet 4L, 4ML, 4P, 4MP, 4, 4M, 4Si and 4Si/MX.
- It is the same as the HP.LasJet-III file with
- three exceptions:
-
- * there is a 600DPI graphics entry. This should
- only be used if the printer itself supports
- 600DPI graphics (ie not the 4L and 4ML). Note
- that it requires 4 times as much memory to
- render than a 300DPI page so printing times
- will be increased.
-
- * the printer's LinePrinter font is used for
- Landscape text printing. This avoids a problem
- caused by the Courier font size being too
- large.
-
- * In the graphics modes, the "Page start" string
- has been used to move the initial print
- position and hence allow smaller paper offsets.
- As a result, a default paper size of "A4
- (LaserJet 4)" is selected.
-
- The difference between most of these files is
- minor: the LasJet-II file has the multiple copies
- command enabled, the DeskJet+ file has the
- compression facility enabled, the LasJet-III file
- has both multiple copies and compression enabled,
- and the DeskJet file has neither of these enabled.
- You should make your choice of which file to use
- on which of these two facilities your printer
- supports. In all other respects the four files are
- functionally identical. This does not however mean
- that the results will be the same on all printers.
-
- For graphics the results should be the same,
- except that printing will be faster if compression
- is in use. For text printing there could be
- significant variation in the results. It all
- depends on what font heights, pitches and styles
- your printer supports. The full range of heights
- and pitches are specified in the definition files
- for both Portrait and Landscape mode to obtain all
- the features of fancy text printing. If however
- your printer does not have the requested font
- style, then the printer will select the best
- approximation it has. Thus for example expanded
- text (6 characters per inch) does not come out as
- expanded on the LaserJet II, because the widest
- text the LaserJet II has is 10 characters per
- inch. Installing a Courier font card may improve
- the situation, if it has some of the sizes
- requested on it. 6, 10, 12 and 17 CPI are the
- pitches used, and 12 and 8.4 point (for
- superscript and subscript) are the heights used in
- Portrait mode. In Landscape mode the corresponding
- pitches are 8.5, 14, 17 and 24 CPI and the heights
- used are 8.5 and 6 point. Italic style is missing
- from some printers, the Olivetti JP 150 and JP 350
- do not do underlining in Landscape mode, and no
- printer seems to support the Light print weight.
- Sometimes text will come out in a Typeface other
- than Courier eg. Landscape text on the LaserJet II
- comes out in the Line Printer typeface. This is
- because the Typeface is last on the list of
- priorities for the best match algorithm - it deems
- getting the size right more important.
-
- Most of the ISO Latin 1 international characters
- are obtained by telling the printer to change to
- the ISO Latin 1 (ECMA-94) symbol set. The few
- characters that cannot be obtained in this manner
- (characters 128 to 159) have mappings defined for
- them. Character 160 (non-breaking space) is mapped
- to a standard space as some printers (eg. Star
- LaserPrinter 8III) consider character 160 to be
- invalid.
-
- Not all of the control sequences are held in the
- printer definition file for LaserJet printers, for
- technical reasons. For text printing, most of the
- control sequences are in the file. The control
- sequences for manual feed, auto feed and paper
- tray size selection are in
- !Printers.lj.Resources.Messages. The control
- sequences used for position changing, setting the
- lines per page at the start of each new line or
- new page and for performing tabs are in the
- !Printers.lj.Resources.Support BASIC program file.
- Also page titles (if enabled) are printed using
- the secondary font. You should not need to modify
- the control sequences in the Support BASIC
- program, as they are very standard. It is unlikely
- that you will need to modify the control sequences
- in the Messages file.
-
- For graphics printing, all of the control
- sequences are held in the PDumperLJ module, but
- the "Page start" string will be taken from the
- printer definition file if it is present. You can
- control whether or not the multiple copies command
- is supported and whether or not compression is
- supported with !PrintEdit, and that is all.
-
- If you have a LaserJet II, IID or IIID with a
- PostScript card fitted, you should be able to use
- the PostScript printer definitions LJ_II_PS,
- LJ_IID_PS and LJ_IIID_PS as appropriate.
-
- The HP.LasJet4-PS printer definition file is for
- use with HP LaserJet 4 series 600 DPI printers in
- PostScript mode, including the HP LaserJet 4MP,
- 4M, 4Si/MX and the HP LaserJet 4P, 4 and 4Si with
- PostScript upgrades fitted. The only difference
- from the Generic.PostScript file (apart from the
- removal of colour) is that the printer is
- specified as being a 600 DPI printer. This does
- not however cause the printer to switch to 600 DPI
- PostScript automatically (unlike in LaserJet mode)
- hence 600 DPI should be selected on the printer's
- control panel. In practice, it's not that
- important, since the PostScript printer drivers do
- not take much notice of the resolution. PostScript
- printing at 600 DPI requires a lot of memory in
- the printer for holding the image of the page. It
- is recommended that the printer have at least 6
- megabytes of memory if 600 DPI PostScript is to be
- used.
-
- For the HP LaserJet 4ML printer use the PostScript
- file (do not select colour) since the printer
- cannot print at 600 DPI. Also if the other
- LaserJet 4 series printers are used for PostScript
- at 300 DPI then they too should use the PostScript
- file.
-