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The main difference between the two sets of printer control characters might be the portability of ASA control characters versus the hardware dependency of machine control characters. The fact that the ASA controls were space before write , while the machine controls were space after write could require some data streams to be converted.
Later printers such as the IBM 3211 and IBM 4248 did away with the physical carriage control tape and used an electronic Forms Control Buffer (FCB) instead. ASA carriage control characters are still used for printer output from mainframe applications and software today. They are interpreted by drivers and other software before being printed on ...
Printing control characters were first used to control the physical mechanism of printers, the earliest output device. An early example of this idea was the use of Figures (FIGS) and Letters (LTRS) in Baudot code to shift between two code pages. A later, but still early, example was the out-of-band ASA carriage control characters. Later ...
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 ...
Touchmaster Five with carriage return lever at left. Originally, the term "carriage return" referred to a mechanism or lever on a typewriter.For machines where the type element was fixed and the paper held in a moving carriage, this lever was on the left attached to the moving carriage, and operated after typing a line of text to cause the carriage to return to the far right so the type ...
Line printers frequently used a variety of discharge brushes and active (corona discharge-based) static eliminators to discharge these accumulated charges. Many printers supported ASA carriage control characters [citation needed] which provided a limited degree of control over the paper, by specifying how far to advance the paper between ...
carriage return, U+0013 (CR) delete character, U+007F (DEL) C0 control, U+0000–U+001F (NULL–US) C1 control, U+0080–U+009F (XXX–APC) To resolve invisible-character errors, remove or replace the identified character. Most intentional white-space characters should be replaced with a normal space character (i.e. press your keyboard's space ...
The IBM 1132 was the last printer manufactured by IBM to use this technology. IBM 1403 printer opened up as it would be to change paper. The print chain is behind the wide black ribbon, hinged open to the right, which is the width of the paper. Also note carriage control tape in upper right.