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Installation of Windows 3.1 printerdrivers
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1.  In the Main group, choose the <Control Panel> icon.

2.  In Control Panel, choose the <Printers> icon.
    The Printers dialog box appears. If you have never installed a
    printer, the dialog box expands to display a list of printers
    available in the Windows version 3.1 package, and the <Add> button
    is unavailable. Go to step 4.

3.  Choose the <Add> button.
    The dialog box will expand to display the List Of Printers.

4.  In the <List Of Printers> box, select -
    <Install Unlisted or Updated Printer>.

5.  Choose the <Install> button.
    A dialog box appears, instructing you to insert the disk that has
    the printer-driver file on it.

6.  If the disk is in your A: drive, type in the path 'A:\' and
    select the <OK> button. If the disk is in a different drive,
    type the drive name and then select the <OK> button.
    Example - if the disk is in the B: drive, type 'B:\',
    without the quotes, and then select the <OK> button.

7.  In the <List Of Printers> box, select the Star SP300 Printer.

8.  Choose the <OK> button.
    The <Printers> dialog box will appear. The Star SP300 printer is
    now listed in the <Installed Printers> list.

9.  Select the <Set As Default Printer> box.

10. For instructions on how to configure your printer, Please see
    Chapter 5, "Control Panel," in the "Microsoft Windows User's
    Guide."

11. Choose the <Close> button.

12. Please note: You have to select the correct paper width and length
    in the Paper Menu selection box. The default is 1 inch x 1 inch.

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Problems with Windows 3.1
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I found some problems with the driver for SP300. The problems are mostly 
arithmetical problems, so with the left margin and the string length.

The following table shows the correct values for all applications

left margin:	minimum left margin is always 0.42 cm
right margin:	normally set to 0

4 cpi (8 cpi expanded), 8 cpi
Format paragraph right Ident = 0 cm

6 cpi (12 cpi expanded), 12 cpi
Format paragraph right Ident = 0,2 cm

7,5 cpi (15 cpi expanded), 15 cpi
Format paragraph right Ident = 0,4 cm


- the printer internal fonts as double high characters can not be supported,
  because the SP300 expects an 1/6 inch linefeed, the driver always sends
  a 2/6 inch linefeed. This is usual in EPSON emulation.