DISPLAY

Purpose:  Sets the display font.

Syntax:   DISPLAY = <xx|ID> [GRAPHICS|TEXT]
                       [FONTS<yy|STANDARD>]
                       [PAGES zz] [HIGH|LOW]
                       [FILE [drive:][path]filename]
                       [PRELOAD|LOADONCALL]
                       [RESIDENT|NONRESIDENT]
                       [USEHARDWARE|USEBIOS]
          Where, filename - font description file
                 zz       - number of pages supported
                 xx       - page code
                 ID       - country identifier

Note:   By default, the following optional parameters are assumed:

        GRAPHICS =  FONTS STANDARD, PAGES 1, LOW \
                    \ FILE Display.Cpi, LOADONCALL, RESIDENT

     This command allows to load an alterantive display font, if the
videoadaptor supports this feature. As a rule, these are: EGA, VGA (SVGA),
MGA, XGA and analogous. If the RESIDENT parameter is present, the system
will load a code that will save the specified font during change of the
videomode and make it possible to interactively switch to it by pressing
Ctrl-Shift-F1...F9 , where F1-F9 define active page (F1 is the BIOS
supported font). For more details, refer to the external DISP command
description.

     PRELOAD, LOADONCALL  define the initial state: in the first case a new
font is loaded during processing the DISPLAY command from the first page, in
the second case switching between fonts is possible either in the
interactive mode, or with the help of CHCP and DISP commands. FILE
sets the path and filename for the file containing binary font description.
By default, the filename is Display.Cpi. HIGH and  LOW set the type of
memory used for allocation of font images, the former sets the usage of
extended memory, while the latter concerns the lower area memory.

     PAGES sets the number of various code page combinations, supported by
the system. PAGES1, the default value,  is sufficient for a twin-language
interface. It is recommended to use higher values in combination with HIGH,
which will save on system memory.

     FONTS sets the number of types for each font. Normally, different
matrix fonts are required to support all the available videomodes, e.g.  8x8
,8x14, 8x16. Their number is defined by the type of the videoadapter.  But,
if a soft  font is to be used in one of the possible modes, FONTS should be
specified to save the system memory.

Supported           Adapters                 FONTS
     matrices                     1        2            3
-----------------------------------------------------------------
 8x8, 8x14, 8x 16         VGA    8x16   8x8, 8x16   8x8,8x14,8x16
 8x8, 8x14                TGA    8x14   8x8, 8x14   8x8, 8x14
 8x8                    other    8x8    8x8         8x8

                                        Soft font matrices

     GRAPHICS, TEXT  instruct the system to support a national font either
both in graphic and text modes or only in text mode.  When using GRAPHICS,
more system memory is required, as a rule.

     When processing the DISPLAY command, the System can only load fonts for
a single code page (country). On specifying with PAGES a value larger than
1, loading other code pages becomes possible, but only using the DISP -
external DOS command.  A two-letter country identifier code may be used
instead of the code page. In this case, the system will choose the
corresponding page code automatically. See COUNTRY for more information on
this feature.

     Available code pages:

  437   United States of America
  850   Multilanguage interface
  860   Portugal
  863   Canadian-French interface
  865   Norway
  866   Russia

     USEHARDWARE and USEBIOS define the way the videoadapter is programmed.
USEHARDWARE instructs the system to program VGA/EGA adapter registers
directly. With this mode there will be no display flickering when switching
between fonts interactively with keys Ctrl-Shift-Fx.  USEBIOS instructs the
system to use the BIOS video for display fonts loading.  High level of
compatibility with existing hardware and software is achieved here.