5-8
Series 3800 Product Reference Guide
Entering Data
The Series 3800 Keyboard
The keyboard is used for entering data and issuing commands to the terminal. Figure 5-1
illustrates the standard 35-key keyboard; Figure 5-2 presents the 46-key keyboard.
The keys on the keyboard are distinguished as modifier keys and character keys. Because
terminal keyboards have fewer keys than PC keyboards, each character key can produce
more than the usual one or two characters. The four modifier keys, SHF (Shift), ALPHA,
CTRL, and FUNC, used individually or in combination, determine which character or special
function the character keys produce.
Because the keyboard is programmable, your terminal may not work as described here. For
more information and illustrations of other keyboard states, see the Series 3000 Application
Programmer's Guide and your application guide.
Using the Keyboard
Except for during boot operations, the terminal expects the operator to press keys one at a
time. If the terminal has been programmed for it (ERR3000 is loaded), and if two or more
keys are pressed simultaneously, the terminal indicates a Double-Key error.
The keyboard also has an optionally configurable auto-repeat function. If the application
allows, a character repeats as long as the key is held down. If the key is pressed immediately
following a modifier key, the modifier sequence affects only the first occurrence of the
character key.
Modifier Keys
The Shift, Alpha, Function, an d Control keys are modifier keys. When pressed individually
or in certain combinations, these keys change the keyboard state and possibly the character
produced by the character key subsequently pressed.
For example:
!
Pressing <Alpha> causes numeric keys to produce letters.
!
Pressing <Alpha> affects all succeeding character keys until <Alpha> is pressed
again. The other modifier keys affect only the next character key.
!
Pressing <Func> followed by <Ctrl> produces Alt characters, with the same effect as
pressing the Alt key on a PC.
Summary of Contents for Series 3800
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