is, no other files are allowed to access him). To see the sustainability of the automatic volume. When the computer executes this function, it creates and allocates memory for it, and the automatic variable is destroyed when the function is completed and returned. The process is implemented through a stack mechanism. allocating memory for an automatic variable presses the stack, and the function returns when the stack is rolled back.
Static statically variable
One, local static variablesLocal v
This article comes from: http://baike.baidu.com/view/6159.htm8086 has 14 16-bit registers, which can be divided into (1) General registers, (2) instruction pointer, (3) mark register and (4) segment register. There are 8 General registers, which can be divided into two groups. One is the data register (4), the other is the pointer
After the user runs the program, the user automatically checks the authentication status through the file. if the authentication is not performed, the user needs to register. This article describes how to implement the software registration function (machine code + registration code mechanism) based on python scripts. For more information, see
I. preface:
Objective: to register an existing python image pro
write in frontThis afternoon a colleague asked "register" what is the role of the keyword? Oh, you're talking about "register", it's a function of ... My head is suddenly broken, I rub, what do you mean, so familiar with the strange feeling. C Language development time is not short, but it seems that no use of "register", but the role is still know, suddenly can'
The previous article learned the relevant knowledge of the bus, on the way ABC was assumed to be a 8-bit register. This article will learn how to build this register .
This is divided into two three parts, data input, register, data output. First of all, regardless of the output, look at the data input and register
Reverse beginners [2]: getting started with assembly-registerThe main structure of the CPU is the memory generator, controller and register. These devices are connected through the internal bus of the CPU. The memory generator is responsible for information processing, the registers are responsible for information storage, and the controller controls various devices for work, the internal bus connects various devices for data transmission between them
Label:
Classification
Referred
Start Address
End Address
function codes that can be used
Output logic coil/(read/write bit)/(DI/O) (e.g. relay switch control )
0x
00000
09999
0X01 read a set of logic coils0X05 Write a single coil0x0f Write multiple coils
Contacts/ Switch inputs /read-only bits (DI) If the key is pressed
1x
10000
19999
0X02 read a set of switch inputs
Input
Storage of words in memory
A memory unit that stores a hex data (16 bits). It consists of two consecutive memory units with two addresses. The high address memory unit stores the high byte of the font data, and the low address memory unit stores the low byte of the font data. The starting address is N.
DS and [address]
"[...]" Indicates a memory unit, and "0" in "[...]" indicates the offset address of the memory unit. The 8086cpu automatically retrieves the data in DS as the segment address of
Register: This keyword requests the compiler to make the variables available in the CPU internal registers as much as possible, rather than through memory addressing, to improve efficiency . note is as far as possible, not absolute . You think, a CPU register is just a few or dozens of, if you define a lot of register variables, it may not be exhausted can not al
method One:Run under DOS or Windows command line: regsvr32 ocxname.ocx RegisterExample:regsvr32 netshare.ocx//Register Netshare.ocx controlsregsvr32/u netshare.ocx//de-Registration of Netshare.ocx controlsIf the Netshare.ocx file is not in the system directory, you must also include the full path in front of the file name. In addition to the Regsvr32 application, Microsoft also provides a program called RegClean.exe on its web site that can examine th
For example, when we use assembly commands such as ADC and SBB, We Have To unbind the content in the flag register (EFL) for the sake of attention. View the value of each flag in binary details. Then these commands that need to use the mark register are clear at a glance. --
I can't wait to write a test code to see the secret:
# Include
Int main (void){_ ASM{MoV Al, 0xffMoV DL, 0x01
Add Al, DLADC Al, DL}
R
========================================================== ========================================================== ========1. General Register Classification:A. Registers not backed up, including R0-R7For each unbacked register, all modes refer to the same physical register (for example, R0 in USR and R0 in FIQ are the same
.
Register Device
the registers have a total of 37 x , 31 Universal registers, 6 status registers. The approximate structure is as follows, a total of 18, not enough 37, the remainder is actually the register of the banked, in different modes, the packet register and the program st
There are some working registers in the EU and Biu sections of 8086. These registers are used to store various information in the calculation process, such as the operand address, the operand, and the intermediate result of the calculation. It is much faster for a microprocessor to access data from a register than to access data from a memory. Therefore, in the computing process, it can improve the efficiency of using a
This section describes the eflags register. It is an Intel instruction set reference for quick reference.
The 32-bit eflags register contains a group of Status flags, a control flag, and a group of system flags. figure 3-8 defines the flags within this register. following initialization of the processor (either by asserting the reset pin or the init pin), th
Reprint: http://blog.sina.com.cn/s/blog_6a1837e90101128k.htmlRegister: This keyword requests the compiler to make the variables available in the CPU internal registers as much as possible, rather than through memory addressing, to improve efficiency . note is as far as possible, not absolute . You think, a CPU register is just a few or dozens of, if you define a lot of register variables, it may not be exha
used to represent the interrupt priority is to use the 7-bit data width to represent the first-priority number as 128. 1-bit data width to indicate the number of secondary priority is 2So 2 of the three in arm cortex-m3 is a 8 priority group. However, there are only 5 priority groupings in Stm32, which represent a slightly different approach, as referenced in the following table: The interrupt-related register structure defined in MDK is:typedef stru
1)The ARM processor has a 37+3 32-bit register: 32 General-purpose registers with only one PC pointer register, which is generally used to point to the instruction being taken, rather than the instruction being executed. (Here are the pipelining of ARM processors, described below), seven status registers: But only one CPSR register (to represent the current progr
Register modifier implies CompilationProgramThe corresponding variables will be frequently used. If possible, they should be stored in CPU To speed up its storage. For example, the following memory block copyCode, # Ifdef nostructassign Memcpy (D, S, L) {Register char * D; Register char * s; Register int I;
Vim copy and paste and register
Vim copy and paste and registerTemporary content for operations such as copying, deleting, and replacing in Vim will be stored in registers.
1. Unknown register ("")Two double quotes. Vim is called an anonymous register. For operations such as x, s, d, c, and y, if no register is specifi
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