8085 microprocessor

---- Any microprocessor must be connected to a certain number of components and peripheral devices. However, if each component and peripheral device are connected directly with a set of lines, the connection will be complicated and even difficult to implement. In order to simplify the design of hardware circuits and system structure, a group of lines are commonly used and configured to connect with components and peripheral devices with an appropriate

://s5.51cto.com/wyfs02/M02/82/BF/wKioL1df4NTjypo_AAGs53jLpEA907.jpg "title=" History.jpg "alt=" Wkiol1df4ntjypo_aags53jlpea907.jpg "/>1.1 x86 architectureJune 8, 1978, Intel released the new 16-bit microprocessor "8086", but also created a new era: the x86 architecture was born.The X86 instruction set was developed by Intel Corporation for its first 16-bit CPU (i8086), and the cpu-i8088 (i8086 simplified version) of the world's first PC, introduced by

Development boards with the friendly arm of the barmini2440 even 3.5-inch screen 500 dollars lookThere are several DVD learning discsThis is a high reputationEmbedded Linux operating System learning planningArm+linux route, focuses on embedded Linux operating system and its application software development goals:(1) Master the structure and principle of the mainstream embedded microprocessor (initially set as ARM9)(2) must master an embedded operating

"NetEase Science and Technology News" June 5, according to the Forbes website reported that Huang Renxun in 1993 to create Nvidia company, and successfully built the company into a graphics chip in the field of middle-aged revenue of 3 billion U.S. dollars of giant aircraft carrier. But Huang Renxun is not satisfied with making its chips a mere appendage of a traditional microprocessor. In this increasingly video-dominated world, he argues, graphic pr

software colleges in the formal colleges and universities have relatively few links with these enterprises. The formal University Software Institute is actively working hard, has already established the contact with some of them, strives for in the future to have the formal university software school schoolmate to these enterprise internship or the employment.(3) A small number of companies often want to master more than the embedded, mainly based on the difficulty of embedded. But most compani

code where it is actually called. By using the information stored in the object itself, this code computes the address of the called function body at run time. Use virtual to declare a function that wishes to have the flexibility of late binding. Creating and destroying objects Stack memory To maximize speed, the object is stored in the stack or in a static store, and the storage and lifetime can be determined when the program is written.

Linux kernel has some related architectures under the Arch directory in source code:x86:x86 is an instruction set architecture family;earlier processor names in this series are represented by numbers80x86. Due to the end of "86", includingIntel 8086,80186,80286,80386as well80486, so its architecture is called "x86". The x86 architecture is important for variable instruction length CISC (complex instruction set PC, Complex instruction set computer). ARM:is a 32-bit streamlined instruction set (RI

Java Cards and smart cardsWhat is a JAVA card? A Java card is a contactless microprocessor smart card that can run Java programs. In November 1996, the JAVA Card version 1.0 specification was officially released. Now the latest JAVA card specification has reached the 2.1 version.I believe that the reader of the smart card will certainly ask: the emergence and use of smart cards has been nearly 20 years, why the recent emergence of JAVA card? Why is th

To build reliable software, program specifications are critical. It is difficult to diagnose abnormal behavior of software systems without well-defined specifications. But many software systems have poorly defined program specifications. And, to make things worse, many software systems have no specifications at all. Intuitively, the program specification is a description of the procedural behavior. It can take many forms, but no matter what form it takes, there is a thread that runs through all

We have been testing our FIRST_DRV driver modules in the virtual machine Ubuntu environment before, but this is not our development direction, in the beginning of the study we avoid building too much environment, so we chose only in Ubuntu test drive.Our model is:[first_drv.c]-->[uses Ubuntu kernel source to compile]-->[first_drv.ko (can run on virtual machine)]-->[Install into virtual machine]-->[Hello world!] -->[Uninstalling]-->[Goodbye World from a virtual machine ...]But our ultimate goal i

-state, which is different from the data bus. The number of digits of the address bus determines the amount of memory space that can be directly addressed by the CPU, for example, the address bus of 8-bit microcomputer is 16 bits, the address bus of the 2^16=64kb,16 bit is 20 bits and the addressable space is 2^20=1MB. Generally speaking, if address bus select、read is n bit, the addressable space is 2^n byte. Control bus: used to transmit control signals and timing signals. Control signal, some

CPU is used in the Harvard structure. 2. Harvard StructureThe Harvard structure is a memory structure that separates program instruction storage from data storage, as shown in Figure 1. The CPU first reads the program instruction contents in the program instruction memory, decodes the data address, reads the data in the corresponding data memory, and performs the next operation (usually execution). Program instruction storage and data storage separate, can make instruction and data have differe

sidelines to make predictions, this is the analyst analysis method. In turn, the reports of some governments in the country, or the people who report to the government, wrote a lot of policies, the basic concept is that we first write, or do a lot of predictive analysis, draw a lot of boundaries, to make the box, according to the framework of policy, after the end, the result becomes the industry's people in the head into the policy, not into policy, Many policies are not to be taken. What is t

the underlying hardware, or direct access to arbitrary physical addresses. For this reason, the hardware introduces at least two different execution modes for the CPU: The unprivileged mode of the user program and the privileged mode of the kernel. UNIX calls them "user mode" and "Kernel State" (Kernel mode), respectively. Therefore, each actual file I/O operation must be in the kernel state. The CPU can run either in the user state or in the kernel state. Some CPUs can have more than two execu

boundsBit1: A value of 1 indicates that the write operation caused memory access to go out of bounds, and a value of 0 indicates that the read operation caused the memory access to go out of boundsBit0: A value of 1 means that there is not enough permission to access the contents of the illegal address, a value of 0 means that the illegal address of the access does not have a corresponding page, that is, invalid address So from this error 6 You can also know the reason is that the user program

plays a very important role.and scatter files are very easy to use.For example: like LPC2378 chip with a plurality of discontinuous SRAM, the general Ram is 32KB, but 32KB is not enough, I want toA. The RW data in C is placed in the USB SRAM, then this function can be done through the scatter file.Here is a description of this example:This is a standard commonly used distributed loading file, now annotated in the later, easy to review:;***********************************************************

consisting of a microprocessor um6868-05/9625m/m516d0 and several resistors, capacitors and diodes. Observe the key of individual failure keys, found that they are on the same column, along the conductive layer inspection, but also found that there is a fracture. Remove the screws that fix the circuit board, wipe the circuit board from contact with the conductive layer with a water-free alcohol sponge, and replace it with the same. Plug the keyboard

Beijing Time September 10 Noon news, according to foreign media reported today, AMD Global marketing vice President Leslie Soben (Leslie Sobon) in the media interview that AMD is ready to change marketing strategy, no longer compete with Intel performance. Surrender in Disguise Soben says users don't need to know the technical details of microprocessors, and what's more important for them is what the computer with the chip can handle. The new marketing strategy based on this idea is expected t

1.ARM Company The UK arm Company is a joint venture between Apple, Nokia, Acron, VLSI, and other companies. The company is authorized to sell chip design technology to some manufacturers. Therefore, the use of ARM technology intellectual property of the microprocessor, that is what we commonly call arm micro-device. 2. QualcommQualcomm's mobile processor platform is called Snapdragon, the Chinese name is Dragon. The Dragon Processor platform is a

Comparison of interrupt mode and polling mode Basic concepts of interrupts program interruption is usually referred to as interruption, refers to the CPU in the process of normal operation, due to pre-selection arrangements or the occurrence of various random internal or external events, so that the CPU interrupts the running program, and go to the corresponding service program to deal with, this process is called program interruption. Second, the interrupt of the 80x86