16 bytes

Keil RTX is a royalty-free, deterministic real-time operating system for ARM and cortex-m devices. With this system, you can create programs that execute multiple functions at the same time, and create applications with better structure and easier

The primary key and foreign key are the adhesives that organize multiple tables into a valid relational database. The primary key and foreign key design have a decisive impact on the performance and availability of the physical database. The

ISO8859-1, usually called Latin-1. Latin-1 includes additional characters that are indispensable for writing all Western European languages. Gb2312 is a standard Chinese character set. But the ISO 10646 code has the following problem: the UTF-16 or

In. net System. Text. encoding. Default. getbytes (strdata) Both Chinese characters and Kana take up two bytes.   But in Android, Originalchar. getbytes (). Length In the UFT-8 encoding format, both Chinese characters and Kana take up three

Theory: 4-byte error code EDC: In the CD-ROM sector, there is a 4-byte 32-bit EDC domain, which is used to store the CRC code. The CRC verification code of the CD-ROM generates a polynomial of 32th order, p (x) = (x16 + x15 + X2 + 1) (x16 + X2 + x +

Union provides a way to circumvent the type system of C and allow multiple types to reference an object. The syntax of Joint Declaration is the same as that of struct, but the semantics is quite different. Instead of referencing different memory

There are several problems: 1. Why does htons need to be used to convert the byte order during bind, but does not need to be converted when the send function sends data in the future? After thinking about it, I thought: when starting bind, the port

SPI busThe serial peripheral interface bus is a three-line serial bus developed by Motorola for data transmission using three lines, which are the sck clock pins, SI data input pin and so data output pin. In addition, the CS chip selection pin can

Find the region on the Internet. In s5pv210_irom_applicationnote_preliminary_20091126133: 2.9 header information data for Boot Code Description, This section describes the composition of bl1. The U-boot-Samsung-dev/sd_fusing directory contains the

This article conducts in-depth analysis and research on the String class of. NET Framework. It provides detailed information about the implementation of the String class, and describes the efficiency of various usage methods of the String.Many of

Remote dial-in user authentication service (RADIUS) Http://91mail.51.net provides translation for learning and communication only It shall not be used for other purposes; otherwise, the consequences shall be borne by you Abstract: This document

Malloc and sbrk for Process Memory Management in Linux I was very interested in writing the malloc function. By the way, I would like to know about the memory management of processes. During the writing process, we found that malloc only allocates

Master Boot Record MBR, Boot Record mbr Master Boot Record(Master Boot Record, abbreviated as MBR), also calledPrimary Boot SectorIt is the first sector that the computer must read when accessing the hard disk after it is started. Its

The following method is a general summary of the massive data processing methods. Of course, these methods may not completely cover all the problems, however, such methods can basically deal with the vast majority of problems encountered. The

QPBOC expands personalization and transaction process, and qpboc expands transaction process 1 Q extended data needs to be written into Three DGI: A001, 8020,9020 1.1 A001 extended application configuration DGI Length Value (example)

This section describes the sse2 Integer Operation commands. 5. Data Migration instructions MovdqaXMM, XMM/m128 MovdqaXMM/m128, XMMThe source memory content value is sent to the destination register. When m128 exists, the memory address must be

Read the smbios information. In Windows, the following two methods are provided: 1. Use WMI (Windows Management Instrumentation) Read the smbios information. 2. The system APIs reads the smbios information:Enumsystemfirmwaretables

The primary boot sector of a hard disk is a sensitive area. Its security directly determines whether the hard disk can be used normally. In-depth understanding and flexible use of the primary Boot Sector of the hard disk will help you maintain your

GUID (Global unique identifier) is a globally unique identifier, which consists of the ID numbers on the NIC (each Nic has a unique ID number) and a 16-byte binary value generated by the unique number of the CPU clock.The GUID format is

Here we will use desktop platform to describe (the power-on sequence of notebook platform involves EC. For details, refer to "power on sequence" in the Forum"Article); Also, the rough flow (rough process) is described, and the detailed sequence