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║           SYSTEM Requirements for  "EXTRADOS"  by  C. J. Bray.              ║
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THIS PROGRAM REQUIRES:

         1.  That the file 'ANSI.SYS' is on your start-up disk.

         2.  That the file 'CONFIG.SYS' iss on your start-up disk, and that it
             containes the line 'DEVICE=ANSI.SYS'.

         3.  That there is at least 2K of spare RAMDRIVE on drive C available,
			 or drive C is a hard disc. (plus a further 6K to run the Demo)

         4. That, prior to using EXTRADOS, a batch file (such as AUTOEXEC.BAT) 
            or the keyboard has issued the following commands:
         
                   EXTRADOS
                   PATH C:;A:;B:

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║                          How to use "EXTRADOS"                              ║
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EXTRADOS provides extra commands for screen handling. Once the program has been
called the following extra commands are available, from within batch files or
directly from the keyboard:

BEL                Sounds the bleeper in the monitor.       

BLINK              Switches the monitor to blinking characters. 

BOLD               Switches the monitor to emphasised characters.

BS                 Moves the cursor back one space.

CURSOR row;column  Moves the cursor to row;column.

DOWN n             Moves the cursor down n rows.

ESC string         Sends an ESC character to the monitor followed by whatever
                   string was input.  E.g.: ESC [2J would clear the screen. 

LEFT n             Moves the cursor left n columns.

LF                 Carries out a line feed on the monitor.

NORMAL             Returns monitor to its normal screen colours and character
                   types.

REVERSE            Switches the monitor to reverse characters.

UP n               Moves the cursor up n rows.

REDEFINE d1;d2/$   Redefines the key whose decimal code is d1 to produce either
                   the key whose decimal code is d2 or the string (which must be
                   enclosed in quotes). E.g:
                    REDEFINE 65;66 would produce a 'B' whenever 'A' was pressed.
                    REDEFINE 65;'Aardvark' .......
                    Both can be reset by:   
                                         REDEFINE 65;65

RIGHT n            Move the cursor right by n columns.

RUBOUT             Erase from the cursor to the end of the line.

SCREEN colour      ) Set the background (screen) or foreground (words) to be a
WORDS colour       ) colour: where 'colour' can be black, red, green, yellow, 
                   ) blue, magenta, cyan or  white. 

WRITE string       Output string to the screen but do NOT move cursor from the
                   last position it occupied. 

WRITELN string     As for WRITE but followed by a CR and a LF.

40COL              Switch monitor to 40 column mode.

80COL              Switch monitor to 80 column mode.