BASIC FUNCTIONS
SECTION 5.9
HELP
5.9.1 Function HELP displays lines of text on HUNTER's screen when the
HELP key is pressed.
Syntax
HELP line number
HELP numeric expression
Exanples 1010 REM THIS IS A PIECE OF HELP TEXT
1020 REM INTENDED TO ASSIST THE OPERATOR
1030 REM IN THE USE OF HUNTER
1040 REM PLEASE PRESS HELP TO RETURN
1050 REM TO PROGRAM
10000 HELP 1010
Execution of line 10000 will cause the block of remarks to
be used as the HELP text,
Remarks HELP requires an argument which must be a valid line
number. The referenced line must be a REM statement. When
the operator presses HELP, text from the referenced REM is
placed on the screen, Use of the cursor up and cursor
down keys causes scrolling through a contiguous block of
REM statements. The HELP text start may be changed by
executing another HELP statement,
VER.V09F
Normally, the help key on the HUNTER keyboard is disabled.
Execution of HELP causes the HELP code to be loaded into
the keyboard table, therefore enabling the use of the key.
Once the HELP statement has been executed, it is not
possible to disable the HELP function except for deleting
the HELP code in the keyboard map.
NOTE: On power up the help key will be again disabled and
therefore it is necessary to execute the HELP statement
within the program initialisation,
It is recommended that all the HELP text be written con-
tiguously so that the operator may scroll through all of
it, Scrolling stops when any non-REM line is encountered,
so blocks of text can be easily partitioned if required,
NOTE: HELP text cannot be displayed if HUNTER is in
graphics mode and operation of the HELP key is ignored. It
is then necessary to use "shift PWR" to
tum off HUNTER.
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