What are the character encodings commonly used in microcomputers
What this article shares with you is about the character codes commonly used in microcomputers. The editor thinks it is very practical, so I share it with you. I hope you can learn something after reading this article. Let's take a look at it with the editor.
The character code commonly used in microcomputers is the ASCII code; ASCII is a computer coding system based on the Latin alphabet, mainly used to display modern English and other Western European languages; it is the most common standard for information exchange and is equivalent to the international standard ISO/IEC 646.
Operating environment of this article: Windows7 system, DELL G3 computer
What is the character encoding commonly used in microcomputers?
The character encoding commonly used in microcomputers is ASCII code.
ASCII ((American Standard Code for Information Interchange): American Standard Code for Information Interchange) is a computer coding system based on the Latin alphabet, mainly used to display modern English and other Western European languages. It is the most general information exchange standard and is equivalent to the international standard ISO/IEC 646. ASCII was first published as a specification standard in 1967 and last updated in 1986, with a total of 128 characters defined so far.
Mode of expression
ASCII codes use a specified combination of 7-bit or 8-bit binary numbers to represent 128 or 256 possible characters. Standard ASCII codes, also known as base ASCII codes, use 7-digit binary numbers (the remaining 1-bit binary is 0) to represent all uppercase and lowercase letters, the numbers 0 to 9, punctuation, and special control characters used in American English. Where:
Control characters: LF (line feed), CR (carriage return), FF (page feed), DEL (delete), BS (backspace), BEL (ring), etc.; communication characters: SOH (header), EOT (tail), ACK (confirmation), etc.; ASCII values of 8, 9, 10 and 13 are converted to backspace, tabulation, line feed and carriage return characters, respectively. They do not have a specific graphical display, but will have different effects on text display depending on different applications.
32 '126 (95 total) are characters (32 are spaces), of which 48' 57 is 0 to 9 ten Arabic numerals.
65'90 is 26 capital letters, 97 '122 is 26 lowercase letters, and the rest are punctuation marks, arithmetic symbols and so on.
Also note that in the standard ASCII, the highest bit (b7) is used as the parity bit. The so-called parity is a method used to check whether there is an error in the process of code transmission, which is generally divided into parity and parity. Odd check stipulates that the number of 1 in a byte of correct code must be odd, if it is not odd, add 1 in the highest bit b7; even check stipulates that the number of 1 in a byte of correct code must be even, if not even, then add 1 in the highest bit b7.
The last 128 are called extended ASCII codes. Many x86-based systems support the use of extended (or "high") ASCII. The extended ASCII code allows the 8th bit of each character to be used to determine the additional 128special symbol characters, loanword letters, and graphic symbols.
These are the character codes commonly used in microcomputers. The editor believes that some of the knowledge points may be seen or used in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.
