0xCD

0xCD is the hexadecimal representation of the decimal number 205. In computing, it is commonly used to denote a single byte value in data streams, object code, and memory dumps. Its binary form is 11001101.

In the x86 instruction set, 0xCD is the opcode for the software interrupt instruction (INT). The byte that follows specifies the interrupt vector (an 8-bit immediate). A well-known example is 0xCD 0x80, which invokes the Linux system call interface on 32-bit x86 systems.

In character encoding, 0xCD corresponds to the Unicode code point U+00CD, which is the Latin capital letter I with an acute (Í). In ISO/IEC 8859-1 (Latin-1) and Windows-1252, 0xCD maps to the same character Í. In UTF-8, the character Í is encoded as the two-byte sequence C3 8D, not as a single 0xCD byte.

When used in color values or hex literals in programming, 0xCD can appear as part of larger values. For example, a color component might be specified as 0xCD in a 24-bit color code (paired with other bytes), or as part of hexadecimal literals in source code.

Summary: 0xCD is a common byte value with practical significance in low-level programming as an INT opcode, in character encoding as the letter Í, and as a general hexadecimal representation in data and code.