IBM 1483DSV User Manual

Unprotected fields are classified as either alphanumeric or numeric. Alphanumeric
fields can accommodate both alphabetic and numeric data characters. Numeric fields
are controlled by the application program so that attempts to enter characters other
than digits 0 through 9, a period, a Dup key, or a minus sign result in an error. On
international keyboards, the comma can be entered instead of the period. The display
station with a Data Entry keyboard automatically shifts into Numeric mode whenever
the cursor enters a numeric field.

Data characters in unprotected fields also can be displayed as intensified (brighter) fields.
In applications requiring the use of confidential information, both the protected and
unprotected fields can be programmed to be nondisplayed fields.

Use of nondisplayed fields precludes visual verification of entered data before
transmission to the CPU.

Before you can begin to enter data characters, the display station must access the CPU
and its application program. Access is usually achieved by using the Attention, Program
Access (PA), Function (F), Clear, or Enter key, or through a series of sign-on commands
and programmed CPU responses. This series is initiated when the display station comes
online. Contact your supervisor or refer to a system user’s guide for appropriate program
accessing procedures.

The description of keystroke functions and operations initiated from the keyboard in this
section applies to display stations with 102/103-key, 104-key, or 122-key keyboards
attached. If symbols are different from keyboard to keyboard, all are illustrated in the
text. The symbols for each function can be found on the keyboard attached to the display.
Remember that legends that appear on the key face are Alt functions and legends that
appear on the key top can be shifted or nonshifted functions as illustrated in Figure 3-1
on Page 3-3.