1\variable{CHEAP_VIDEO} 2\synopsis{Control flicker on old video cards} 3\usage{Int_Type CHEAP_VIDEO} 4\description 5 Some old video cards for MSDOS systems, most notably the CGA card, 6 display snow when updating the card. This variable should be set to 7 \1 to avoid the presence of snow when used with such a card. 8\notes 9 This variable is not available on all systems. 10\seealso{SCREEN_WIDTH, SCREEN_HEIGHT} 11\done 12 13\variable{IGNORE_BEEP} 14\synopsis{Control beeping of the terminal} 15\usage{Int_Type IGNORE_BEEP} 16\description 17 This variable determines how the terminal is to be beeped. It may 18 be any one of the following values: 19#v+ 20 0 Do not beep the terminal in any way. 21 1 Produce an audible beep only. 22 2 Produce an visible beep only by flashing the display. 23 3 Produce both audible and visible bells. 24#v- 25\notes 26 Not all terminals support visible bells. 27\seealso{beep} 28\done 29 30\variable{SCREEN_HEIGHT} 31\synopsis{Number of display rows} 32\usage{Int_Type SCREEN_HEIGHT} 33\description 34 This is a read-only variable whose value represents the number of 35 rows of the display or terminal. 36\seealso{SCREEN_WIDTH, window_info} 37\done 38 39\variable{SCREEN_WIDTH} 40\synopsis{Number of display columns} 41\usage{Int_Type SCREEN_WIDTH} 42\description 43 This is a read-only variable whose value represents the number of 44 columns of the display or terminal. 45\seealso{SCREEN_HEIGHT, window_info} 46\done 47 48\variable{TERM_BLINK_MODE} 49\synopsis{Enable the use of high intensity background colors} 50\usage{Int_Type TERM_BLINK_MODE} 51\description 52 If the value of this variable is non-zero, \jed will interpret 53 high-intensity background colors as blinking characters. On some 54 terminals, e.g., \exmp{rxvt}, the blink bit will be mapped to an 55 actual high intensity background color. 56\notes 57 This variable is not available on all systems. 58\seealso{} 59\done 60 61\variable{TERM_CANNOT_INSERT} 62\synopsis{Control the use of terminal insertion} 63\usage{Int_Type TERM_CANNOT_INSERT} 64\description 65 The value of this variable indicates whether or not the terminal is 66 able to insert. Do disable the use of the insertion capability, set 67 the value of this variable to \0. 68\notes 69 This variable is not available on all systems. It is a good idea 70 not to set this variable. 71\seealso{TERM_CANNOT_SCROLL} 72\done 73 74\variable{TERM_CANNOT_SCROLL} 75\synopsis{Control the use of the terminal's scrolling capability} 76\usage{Int_Type TERM_CANNOT_SCROLL} 77\description 78 If this variable is set to \0, the hardware scrolling capability of 79 the terminal will not be used. This also means that the window will 80 be recentered if the cursor moves outside the top or bottom rows of 81 the window. 82\notes 83 This variable is not available on all systems. 84\seealso{TERM_CANNOT_INSERT} 85\done 86 87\variable{USE_ANSI_COLORS} 88\synopsis{Enable the use of colors} 89\usage{Int_Type USE_ANSI_COLORS} 90\description 91 The variable \var{USE_ANSI_COLORS} may be used to enable or disable 92 color support. If set to a non-zero value, the terminal will be 93 assumed to support ANSI colors. This value of this variable is 94 initially determined by examining the terminal's terminfo file, or 95 by looking for the existence of a \var{COLORTERM} environment 96 variable. 97\notes 98 This variable is not available on all platforms. 99\seealso{HIGHLIGHT} 100\done 101 102\function{get_termcap_string} 103\synopsis{Return the keystring associated with the termcap capability "cap"} 104\usage{String get_termcap_string (String cap);} 105\description 106 This function may be used to extract the string associated with the 107 termcap capability associated with \var{cap}. 108 Note: This function is only available on Unix systems. 109\done 110 111\function{set_term_vtxxx} 112\synopsis{Set terminal display appropriate for a vtxxx terminal} 113\description 114 Set terminal display appropriate for a vtxxx terminal. This function 115 takes a single integer parameter. If non-zero, the terminal type is set 116 for a vt100. This means the terminal lacks the ability to insert/delete 117 lines and characters. If the parameter is zero, the terminal is assumed 118 to be vt102 compatable. Unless you are using a VERY old terminal or 119 a primitive emulator, use zero as the parameter. 120\done 121 122