Turn On Screen Save; Disable Screen Save Option; Enable Character Blink - NCR 7454 Hardware User's Manual

6-12 Chapter 6: NCR 7454 4x20 Customer Display
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Turn On Screen Save

1B 0B
This command causes the one of the screen save functions (Set Screen
Save Blank or Set Screen Save Walk) to activate immediately rather
than waiting for the screen save timer to expire. If the Disable Screen
Save Option command is in effect when this command is issued, it is
canceled and the screen saver is enabled and activated immediately.

Disable Screen Save Option

1B 0C
The firmware will cease to keep time for the screen save activity from
the host software and the display will neither go blank nor begin to
walk due to inactivity from the host. This command can be canceled by
the Turn On Screen Save, Set Screen Save Blank, and Set Screen Save
Walk commands.

Enable Character Blink

1B 0D
The blink attribute is the only modifier that is supported for the display
character positions. The attribute itself is not necessarily programmed
with each new character code. Rather, each time a new character is
received, the current setting of the character blink operator is adopted
as the working attribute for the new character. If a new character is
received while character blink is enabled, the new character will blink.
This makes it possible to have a display with both blinking and non‐
blinking characters. The blink period is one second on and one second
off. All characters that are blink enabled, blink at the same time. The
only way to cause an existing character to start or stop blinking is to set
up the character blink operator, locate the cursor to the correct
character, and resend the individual character code.