6-12 Chapter 6: NCR 7454 4x20 Customer Display

 

Disable Screen Save Option

Format:

1B 0C

Description:

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

Format:

1B 0D

Description:

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.

 

Disable Character Blink

Format:

1B 0E

Description:

This command counteracts the Enable Character Blink. The firmware

 

will implement all new character codes with an on and holding

 

character presentation. On power up, the character blink modifier is

 

defaulted to disabled.

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NCR NCR7454 manual Disable Screen Save Option, Enable Character Blink, Disable Character Blink