This file is a readme description of how to apply the QMS executable file
HEXER.EXE.

Title:   HEXER.TXT

Purpose: Allows you to download binary backgrounds on QMS Crown printers.

History: Some of the many factors that may prevent raw binary files from 
         downloading correctly are

	* PostScript Level 1 printers only support ASCII (7-bit)data
	* Level 2 printers may be set to Level 1 emulation mode
	* The transmission media may only support 7-bit data
	* The communications protocol (PS Protocol) may be set to
   a non-binary (ASCII) mode

 To ensure compatibility with all QMS Crown printers,  binary background
	files should be hex encoded (turned into ASCII) before they are 
	downloaded. The download routine unencodes the file before storing 
	it to the printer's hard disk.

=========================================================================

Download and Test Procedure:

1.  Create a single page print-to-disk file. Follow the guide-lines in
    the printer user's guide.
  
    NOTE: In this example the file will be called: BACKGND1.PCL

2.  Edit this file with any text editor and prepend an appropriate DOC
    header. For example:
      
    %!
    %%IncludeFeature: emulation(pcl5)
    %%EndComments

    NOTE: Ensure that there are no blank lines between the end of the 
    DOC header and the beginning of the background.

3.  Hex encode the edited file. From a DOS prompt enter the following
    command:
      
    C:\> HEXER BACKGND1.PCL
	
    Then the following message displays:

    Working...
    The Hex encoded file will be sent to: BACKGND1.HEX
    Done.
    C:\>
    NOTE: When edited in step 4, the hex encoded data will look 
    like the following, except that the lines will be up to 160 
    characters long.

    4D5A50000D004A0015003D043DA4AD01004000008C0300001C0000004600
    0000580000005D0000006200000074000000790000007E00000090000000
    950000009A000000A2000000DA000000ED000000

4.  Edit the hex encoded file (in this case BACKGND1.HEX) and prepend 
    a hex download routine such as the following:

    %!
    %%Title: Generic Hex Download Routine!
    %%IncludeFeature: emulation(postscript)
    %%EndComments
        
    (%os%DSK7:usr/backgnd1.pcl)
        
    /OutFile exch (w) file def
    /tempbuff 1024 string def
      { currentfile tempbuff readhexstring
         { OutFile exch writestring }
         { dup length 0 gt
            { OutFile exch writestring }
            { pop }
          ifelse
          OutFile closefile exit
         }
       ifelse
      } bind loop

    NOTE: Ensure that there are no blank lines between the end of the 
    download routine and the beginning of the hex encoded data. The
    line which contains (%os%DSK7:usr/backgnd1.pcl) must be modified
    so that each background file stored on the printer's hard disk
    has a unique file name. Check the printer's documentation for the
    system disk name (SYS, DSK6, or DSK7).  

5.  Type the following to copy the file edited in step 4 to the printer:

    C:\> copy /b backgnd1.pcl PORT

    NOTE: Replace PORT with the actual port name (LPT1, LPT2, LPT3,
    COM1, COM2, COM3, COM4, or PRN) used by your printer. Keep in mind
    that nothing actually prints, this print job simply writes the contents of the
    background file to the printer's hard disk.  


6.  Test the downloaded background by sending the following file to the printer:

    %!
    %%Title: Background Test Routine!
    %%IncludeFeature: background (DSK7:usr/backgnd1.pcl 1 sheet)
    %%IncludeFeature: emulation(postscript)
    %%EndComments
    showpage

    NOTE: You must specify the filename and system disk ID that
    was used to download the background.