Husky Hunter - Data Input Techniques

BASIC. PROGRAMMING
SECTION 4.9
4.9.3
4.9.4
A much more practical method is the Basic function SRCH,
DATA INPUT TECHNIQUES
We are all familiar with the computer truism:
"Garbage in - garbage out"
This was never more true than in data capture applications where
out-of-range entries can cause fatal errors that are just
embarrassing in the office, but potentially disastrous in the
field.
To help avoid the most common form of data entry error, HUNTER
provides a unique facility
INPUT USING. Input using pre-filters
incoming data against a predetermined mask and rejects entries
that do not fit at the keyboard, warning the operator to try
again.
Equally important to the user is optimum use of HUNTER's screen
to provide clear, unambiguous prompt messages and input fields.
USING HUNTER'S SCREEN
HUNTER's large, 40 x 8 character, LCD screen can be used to
positive effect to help its operator. Because the screen is
entirely flexible, these notes are provided as a source of ideas
rather than as instructions.
This section refers to character-by-character use, more detailed
information on direct dot addressing is available in Section
4. 7, HUNTER GRAPHICS,
4.9.4,1 TIie Virtual Screen
HUNTER's 40 x 8 character, LCD screen acts as a window to a much
larger virtual screen. When characters are written to the screen
from a Basic program they are always written to the virtual
screen. The commands available in Basic
to move the window are
1
CLS', 'INPUT' and 'LOCATE',
1
CLS
1
Clears the virtual screen and sets the window to the
top left of the virtual screen.
'INPUT' The execution of an 'INPUT' command will move the LCD
window to the part of the virtual screen containing
the 'INPUT' prompt.
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