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ANSI escape sequences are a standard for in-band signaling to control cursor location, color, font styling, and other options on video text terminals and terminal emulators. Certain sequences of bytes , most starting with an ASCII escape character and a bracket character, are embedded into text.
For example, the sequence of code 27 10, followed by the printable characters "[2;10H", would cause a Digital Equipment Corporation VT100 terminal to move its cursor to the 10th cell of the 2nd line of the screen. Several standards exist for these sequences, notably ANSI X3.64, but the number of non-standard variations is large.
In 1973, ECMA-35 and ISO 2022 [18] attempted to define a method so an 8-bit "extended ASCII" code could be converted to a corresponding 7-bit code, and vice versa. [19] In a 7-bit environment, the Shift Out would change the meaning of the 96 bytes 0x20 through 0x7F [a] [21] (i.e. all but the C0 control codes), to be the characters that an 8-bit environment would print if it used the same code ...
For example, the sequence of ^[, followed by the printable characters [2;10H, would cause a Digital Equipment Corporation (DEC) VT102 terminal to move its cursor to the 10th cell of the 2nd line of the screen. This was later developed into ANSI escape codes covered by the ANSI X3.64 standard.
The standard ANSI.SYS is very slow as it maps escape sequences to BIOS calls (which managed to be designed so that two calls were needed to put a character on the screen and move the cursor right). Several companies made third-party replacements such as NANSI.SYS [ 2 ] that interface directly with the video memory , in a similar way to most DOS ...
The VT100 is a video terminal, introduced in August 1978 by Digital Equipment Corporation (DEC). It was one of the first terminals to support ANSI escape codes for cursor control and other tasks, and added a number of extended codes for special features like controlling the status lights on the keyboard.
Example of long-form ANSI artwork. ANSI art is a computer art form that was widely used at one time on bulletin board systems.It is similar to ASCII art, but constructed from a larger set of 256 letters, numbers, and symbols — all codes found in IBM code page 437, often referred to as extended ASCII and used in MS-DOS and Unix [1] environments.
English: Correctly labeled modifier keys for the ANSI Keyboard layout. This diagram includes denotations for the common form factors for 60%, 80%, and 100% sized keyboards. Key sizes are also correct, relative to each other, based on the 1x model.