User guide

118 | P a g e
and letters; such numbers and letters identify the particular version of the SASIXUxx program
being used.
2. A string of periods (.) shown in the screen documentation will appear on the CRT screen either
as blanks or as an informational, warning, or error message.
3. At-signs (@) shown in the screen documentation will appear on the CRT screen as various
character values; such character values identify status information.
4. Underscores ( _ ) shown in the screen documentation are used to show user input fields, which
appear on the CRT screen as various character values in "reverse video" (black characters on a
bright background). All other text on the screen (except for numbers on the next -to-last line)
appears as bright characters on a black background.
Each user input field contains either a default value or the last valid value entered for that field.
The contents of any user input field may be either accepted or modified.
Various keys may be used to move the cursor between and within user input fields; these keys are
listed on the lower right-hand side of the screen. Data may then be entered in any user input
field. The keys that may be used to insert and delete characters within a user input field are
also listed on the lower right-hand side of the screen.
Let's describe the editing key functions. As shown on the right hand side of both screen displays,
the keypad in the normal (unshifted) mode has the following effect on the screen: To move the
cursor to the previous character hit the left arrow or BACK SPACE key ; right arrow moves you to
the next character; up arrow moves you to the previous protected field, while the down arrow
moves you to the next field, as will also the RETURN key. Hitting the HOME key will take you back
to the first line of the screen. The DELete key will delete the character at the cursor and cause
the cursor to back up one position. The IC key when depressed will allow you to insert a character
at the cursor position in the field, while the DC key will allow you to delete a character at the
cursor position in the field. This is as simple to use as any editor like PIE.
Likewise, the keys when the SHIFT key is held down have different functions. The shifted left arrow
will take position the cursor to the beginning of the field the cursor is i n, while the shifted
right arrow key will take you to the end of that particular field. The shifted up arrow will take
you to the previous line, while the shifted down arrow will take you to the next line (so will the
LINE FEED key). The shifted HOME key will take you to the last line. This is a lot harder to write
up and explain than it is to actually use it. Experiment and play around with the function keys
to get a feel for what they do.