Description: Documentation

## variable CHEAP_VIDEO

### Synopsis

Control flicker on old video cards

### Usage

Int_Type CHEAP_VIDEO

### Description

Some old video cards for MSDOS systems, most notably the CGA card, display snow when updating the card. This variable should be set to 1 to avoid the presence of snow when used with such a card.

### Notes

This variable is not available on all systems.

### See also

SCREEN_WIDTH , SCREEN_HEIGHT

## variable IGNORE_BEEP

### Synopsis

Control beeping of the terminal

### Usage

Int_Type IGNORE_BEEP

### Description

This variable determines how the terminal is to be beeped. It may be any one of the following values:

       0    Do not beep the terminal in any way.
       1    Produce an audible beep only.
       2    Produce an visible beep only by flashing the display.
       3    Produce both audible and visible bells.

### Notes

Not all terminals support visible bells.

### See also

beep

## variable SCREEN_HEIGHT

### Synopsis

Number of display rows

### Usage

Int_Type SCREEN_HEIGHT

### Description

This is a read-only variable whose value represents the number of rows of the display or terminal.

### See also

SCREEN_WIDTH , window_info

## variable SCREEN_WIDTH

### Synopsis

Number of display columns

### Usage

Int_Type SCREEN_WIDTH

### Description

This is a read-only variable whose value represents the number of columns of the display or terminal.

### See also

SCREEN_HEIGHT , window_info

## variable TERM_BLINK_MODE

### Synopsis

Enable the use of high intensity background colors

### Usage

Int_Type TERM_BLINK_MODE

### Description

If the value of this variable is non-zero, Jed will interpret high-intensity background colors as blinking characters. On some terminals, e.g., rxvt , the blink bit will be mapped to an actual high intensity background color.

### Notes

This variable is not available on all systems.

### See also

## variable TERM_CANNOT_INSERT

### Synopsis

Control the use of terminal insertion

### Usage

Int_Type TERM_CANNOT_INSERT

### Description

The value of this variable indicates whether or not the terminal is able to insert. Do disable the use of the insertion capability, set the value of this variable to 0.

### Notes

This variable is not available on all systems. It is a good idea not to set this variable.

### See also

TERM_CANNOT_SCROLL

## variable TERM_CANNOT_SCROLL

### Synopsis

Control the use of the terminal's scrolling capability

### Usage

Int_Type TERM_CANNOT_SCROLL

### Description

If this variable is set to 0, the hardware scrolling capability of the terminal will not be used. This also means that the window will be recentered if the cursor moves outside the top or bottom rows of the window.

### Notes

This variable is not available on all systems.

### See also

TERM_CANNOT_INSERT

## variable USE_ANSI_COLORS

### Synopsis

Enable the use of colors

### Usage

Int_Type USE_ANSI_COLORS

### Description

The variable USE_ANSI_COLORS may be used to enable or disable color support. If set to a non-zero value, the terminal will be assumed to support ANSI colors. This value of this variable is initially determined by examining the terminal's terminfo file, or by looking for the existence of a COLORTERM environment variable.

### Notes

This variable is not available on all platforms.

### See also

HIGHLIGHT

## function get_termcap_string

### Synopsis

get_termcap_string

### Usage

String get_termcap_string (String cap);

### Description

This function may be used to extract the string associated with the termcap capability associated with cap . Note: This function is only available on Unix systems.

## function set_term_vtxxx

### Synopsis

set_term_vtxxx

### Description

Set terminal display appropriate for a vtxxx terminal. This function takes a single integer parameter. If non-zero, the terminal type is set for a vt100. This means the terminal lacks the ability to insert/delete lines and characters. If the parameter is zero, the terminal is assumed to be vt102 compatable. Unless you are using a VERY old terminal or a primitive emulator, use zero as the parameter.