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Text File | 1989-06-18 | 13.5 KB | 256 lines | [TEXT/MACA] |
- 6/09/89
- TECH TIDBITS
-
- Copyright 1988, Apple Computer, Inc.
-
-
- INDEX: Text Cut in Half in Diablo Emulation from a LaserWriter Plus;
- LaserWriter IINT and MS-DOS PC Printing Problem; IBM-to-LaserWriter IINT With
- MS Word: Slow Printing Problem; LocalTalk PC Card and PC-Compatibles:
- Compatibility Issues; Troubleshooting LocaklTalk PC; Workaround for PageMaker
- and Windows 286 to LaserWriter IINT; HD Fonts Are Accessible To IBM AT
- Compatibles from a LaserWriter IINTX; LocalTalk PC Can Print Directly To a
- LaserWriter IINT; Serial Configurations Differ on LaserWriters and LaserWriter
- IIs; Printing Speed from an IBM PC to LaserWriter IINT; You Can't Use IBM
- Fonts With a LaserWriter IINTX Unless they are Common to Both; Issuing a
- restart from an IBM PC XT to a LaserWriter
-
- Due to the many calls we receive each week concerning printer connectivity and
- use, we have dedicated this issue to discussing this topic.
-
-
- Text Cut in Half in Diablo Emulation from a LaserWriter Plus
- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
- When printing a full page of text in Diablo emulation on a LaserWriter Plus,
- the top and bottom line of the text may be cut in half or there may be a
- similar problem.
-
- In order to get maximum lines per page in the Diablo mode, reduce the lines per
- page (or lines per inch) setting. There is no other workaround for this
- situation. The margins set in Diablo mode are the print engine's margins and
- cannot be reset.
-
- LaserWriter IINT and MS-DOS PC Printing Problem
- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
- Some people have had problems printing to a LaserWriter IINT from an MS-DOS
- PC using Apple's LocalTalk PC card, along with the printing software
- included with AppleShare PC. A typical configuration includes Microsoft
- Word (PC) 4.0, under DOS 3.1. Printing originates at the PC and is sent to
- a LaserShare print server, which, in turn, prints to the LaserWriter. All
- connections are standard PhoneNET.
-
- About six out of 10 print jobs from Microsoft Word fail and are flushed by
- the LaserShare during despooling due to an "unknown error". Note:
- Microsoft Technical Support (on the PC side) says that AppleTalk printing
- is "an unsupported network".
-
- Interestingly enough, users don't have printing problems with other MS-DOS
- applications, printing directories, and so on or from any Macintoshes on
- the network. This causes the suspicion that the PostScript driver in Microsoft
- Word may have problems with some of its commands. A number of drivers send
- their own libraries and even reconfigure the persistent parameters in a
- LaserWriter. Assuming the LocalTalk cabling and node have been tested along
- with the LocalTalk PC card for any problems, the source of the problem is
- the PostScript driver from Microsoft Word.
-
- If you study some of the driver outputs from various PC packages, you will
- find that they define huge libraries of commands and even change the
- parameter-RAM settings. Part of the problem is that the PC software
- drivers expect to have the LaserWriter connected serially and set the
- LaserWriter or expect the LaserWriter in a configuration all to themselves.
- This means that the memory taken up by Macintosh Prep libraries may not let
- all of the libraries of PostScript code from the PC driver load. This may
- be what is happening here. To resolve the problem, try the following:
-
- 1) Try a LaserWriter IINTX with memory expanded to at least 4MB.
- 2) Try printing to the LaserWriter just after a powerup and when no other
- Macintoshes or PCs are printing. This should show if the problem is
- with the different drivers from the PCs and Macintoshes.
- 3) Print the documents to an Epson printer from the application and
- configure the AppleShare PC printer connection for Epson emulation.
- This produce PostScript code from the AppleShare PC drivers. These are
- known to be compatible with Apple's Macintosh drivers.
-
- IBM-to-LaserWriter IINT With MS Word: Slow Printing Problem
- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
- Some users with DOS computers on an AppleTalk network using the AppleTalk
- card and running AppleShare PC have complained of slow printing to a
- LaserWriter IINT. If you print to a LaserWriter configured for Diablo emulation
- across LocalTalk, keep the following facts in mind about Diablo emulation:
-
- 1) It is slow because the interpreter for Diablo code is written in
- PostScript and must be translated to PostScript within the LaserWriter
- before printing.
- 2) The printer may not receiving an end-of-file or Control-D from Microsoft
- Word and is waiting for a time out before printing the page.
-
- If the LaserWriter is set for Diablo emulation, try printing a
- multiple-page document to the LaserWriter. If the last page takes as much
- as three minutes to print, the LaserWriter is probably not receiving an
- end-of-page command.
-
- If the LaserWriter is set for PostScript, use the Microsoft Word APPLASER
- driver (from the Microsoft Word printer driver disk).
-
- LocalTalk PC Card and PC-Compatibles: Compatibility Issues
- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
- With the number of PC-compatible workstations growing, questions have
- arisen concerning the compatibility of these workstations with the
- LocalTalk PC card and AppleShare PC. This article describes the issues
- surrounding the card.
-
- Bus Speed
- ---------
- Most PCs or compatibles have an 8 MHz bus. Some compatibles run their
- buses at a faster rate and have a mode to slow the bus speed. Those that
- do not have this slower mode find a great many cards are not compatible,
- because most cards are designed for compatibility with the IBM-PC 8MHz bus.
- The LocalTalk PC card has been tested successfully for 8-MHz compatibility.
- However, faster bus speeds produce reports of incompatibilities.
-
- DMA
- ---
- The LocalTalk card works with either DMA channel 1 or 3. One of these
- DMA channels must be present and available on the PC or compatible.
-
- Control Signal Address Ranges
- -----------------------------
- The LocalTalk card uses the address ranges $240-$247 or $220-$227. One of
- these ranges must be available.
-
- Software Compatibility
- ----------------------
- AppleShare PC is compatible with most software. Some packages, while
- running, don't allow the DA pop application to appear. These packages are
- capturing either the keyboard command or holding the operating system in a
- state where the DA cannot appear. In these cases, the DA usually sounds a
- beep. The only method of using the DA is to set up connections or make
- configuration changes in the DA prior to running these applications.
-
- Also, some printer utilities reroute the printer ports for spooling,
- buffering, or emulation. These may not work with AppleShare PC, may cause
- problems, or may even cause the PC to hang.
-
- Troubleshooting LocaklTalk PC
- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
- In its most basic configuration, the PC LocalTalk Card can only print to a
- LaserWriter over an AppleTalk network with the software included with the
- card.
-
- To make the PC become a client on AppleShare, print to a LaserWriter as a
- native MS-DOS-type printer (directly address LPT1: / LPT2: and so on), and
- have access to other AppleTalk services, you must have AppleShare PC
- software on the PC, too.
-
- When printing to the LaserWriter just from the utility software that comes
- with the card, and not from AppleShare PC, the file to be printed must be
- stored to a disk first (either floppy or hard disk). Most of the more
- powerful MS-DOS word processors provide PostScript output, but -- because
- of the limitations of the software provided with the LocalTalk PC Card --
- not directly to the LaserWriter.
-
- Again, the PostScript information generated by the word-processing program
- must be stored on disk as an intermediate step. Before the PostScript file
- can be sent to the printer, a PostScript initialization file must be sent
- to the printer first. It is possible that each PC application that provides
- PostScript may need a different initialization file.
-
- The PostScript initialization file that comes with Microsoft Word 4.0 is
- called POSTSCRP.INI. The tool that you send the file to the printer with is
- called LWPRINT.EXE and comes with the basic PC LocalTalk option card. As
- per the instructions in the LocalTalk PC card manual (pages 74, 75), to
- send the PostScript initialization file to the LaserWriter, type in the
- following at the DOS prompt: LWPRINT -A POSTSCRP.INI and press <Enter>.
-
- At this time, if all is well, you will be returned to the DOS prompt with
- no error messages. You can then call up the LaserWriter.EXE program and
- follow the instructions in the PC LocalTalk manual to print out your
- PostScript output. The initialization file needs to be sent to the printer
- only when the printer is first being used by the PC, if the printer has
- been reinitialized by another machine (like a Macintosh), or if the power
- to the printer has been interrupted.
-
- However, due to operational environments of MS-DOS, you may run into
- problems. For example, if all PC LocalTalk utilities are in one
- subdirectory on the user's hard disk and that subdirectory is in the PATH
- command's search path, you can access LWPRINT and LaserWriter from anywhere
- in the DOS directory structure.
-
- If the <file name> specified as an argument for the LocalTalk Utilities --
- that is, - LWPRINT -A <filename> -- is not in the current directory, you
- will get a message saying "CAN'T OPEN PRINT FILE <filename>". If this
- happens, no printer initialization will take place and any subsequent tries
- to send PostScript files to the printer via the LaserWriter.EXE program
- will result in printer error messages. Just make sure that the files
- concerned (utility programs, printer initialization files, and data files)
- are really where you specify them to be.
-
- Workaround for PageMaker and Windows 286 to LaserWriter IINT
- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
- This article describes a solution for the following LaserWriter IINT
- problem. A user runs Aldus PageMaker version 1.0 and Microsoft Windows
- 286, version 2.1 on an IBM PC-AT. When the user tries to print, the
- LaserWriter issues a single page with a message generated by Windows 286.
- The message reads:
-
- Version less than 2.0 - Cannot set hardware handshake.
-
- The support staff at Aldus suggests two things: First and most important,
- the customer should upgrade to PageMaker version 3.0. Second, if the copy
- of COMM.DRV on the Windows setup disk is 9/7/88, they should copy an older
- version of the file to the setup disk and reinstall Windows.
-
- If that fails to correct the problem, choose an old-style LaserWriter from
- PageMaker (instead of LaserWriter IINT). That should get them printing
- until Windows is updated to include LaserWriter IINT/NTX support.
-
- HD Fonts Are Accessible To IBM AT Compatibles from LaserWriter IINTX
- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
- If you have been using a LaserWriter Plus, your IBM PC/AT or clone can also
- access the fonts resident in the LaserWriter IINTX hard drive through the
- RS-232 interface.
-
- The fonts installed on the LaserWriter IINTX hard disk will appear as if
- they were in the LaserWriter IINTX ROM. All fonts, whether in ROM or installed
- on the hard disk, should be fully accessible to any PC/AT or AT clone that can
- already access the fonts in a LaserWriter Plus.
-
- Adobe and Apple designed the hard disk option so that LaserWriter IINTX
- operates transparently, and the user can thus access additional fonts without
- having to download them with utilities.
-
- LocalTalk PC Can Print Directly To LaserWriter IINT
- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
- If you wish to print from IBM PC applications such as Windows, it is best to
- have AppleShare PC installed on your system.
-
- If AppleShare PC is not installed, the LocalTalk Card prints only with the
- LaserWriter Print program. If you use AppleShare PC, then the connected
- LaserWriter outputs whatever is printed to the selected printer port.
-
- The printer port is attached to the LaserWriter in the DA application.
- Almost any application that prints with an Apple LaserWriter PostScript
- driver can print to the LaserWriter connected with a LocalTalk PC card
- and AppleShare PC.
-
- An application, DOS, or Windows have to be set for the same printer port as
- the DA application in its printer configuration parameters. If an
- application does not have an Apple LaserWriter PostScript driver, the DA can
- convert Epson printer driver output to PostScript and send that out to the
- LaserWriter.
-
- Apple has tested Microsoft Word and Windows, and has found them to work when
- configured properly with the AppleShare PC software and LocalTalk PC card on
- an IBM AT.
-
- Printing is dependent on the driver used and the port being printed to. This
- is usually handled by an application.
-
- Printing can be facilitated by Windows. Windows-compatible applications can
- use the Windows printer drivers. This requires the printer setup for printer
- port and driver to be designated in Windows instead of the application or
- from DOS.
-
- Most IBM PC applications should work with the LocalTalk PC Card and
- AppleShare PC, assuming Epson or Apple LaserWriter PostScript printing is
- available to the application.