thinkful isa

"Microcomputer without interlocked pipeline stages. Another common informal statement is "Millions of instructions per second ". MIPS chips are widely used in the industry: mips inc. R10000; QED (http://www.qedinc.com. From mips inc in 1996. (Spin off) R5000, R7000, etc. Instruction Set For more information, see MIPS reduction. Generally, MIPS command systems include mips I; MIPS II; MIPS III and MIPS IV. It is conceivable that the command system is backward compatible. For example, the MIPs II

responsible for notifying the observed object attribute changes.3. In-depth understanding Apple uses isa-swizzling to implement KVO. When we observe object A (that is, when we call object A to register the observer ), the KVO mechanism dynamically creates A new subclass of A: NSKVONotifying_A, which inherits from the class of object. KVO will rewrite the setter method of the parent class for NSKVONotifying_A. The setter method will notify all the cha

Xiao wenpeng ( Xiaowp@263.net ), Master's degree, Department of Computer Science, Beijing University of Technology 1. architecture of the PCI bus system PCI is the abbreviation of Peripheral Component Interconnect. As a common bus interface standard, PCI is widely used in computer systems. PCI provides a complete set of bus interface specifications to describe how to connect peripheral devices in computer systems in a structured and structured manner, it also depicts the electrical charac

the system. Some interruptions in the system are hard-wired. For example, the periodic timer of the real-time clock may be fixed to Pin 3 of the interrupt controller. Other pins connected to the controller can only be determined by the Control card inserted into the specific ISA or PCI slot. For example, pin 4 in the interrupt controller may be connected to the PCIe slot No. 0, but an Ethernet card may be inserted in the slot one day and changed to t

the external ISP. In terms of client efficiency, the first method is better; but in terms of controllability and scalability, as well as network efficiency, the second method is better, especially for environments with a domain, the second method must be used for DNS forwarding. KWF has a DNS forwarder, which is more efficient than Windows DNS servers. It only supports DNS forwarding. ISA does not have a DNS forwarder. However, using the full-feature

-oriented language (C) to implement the class in object-oriented language (OC). In fact, we can see what this class looks like after it becomes a struct in C.We can import header files in the file#import Then use the command key and 鼠标左键 enter the runtime's header file definition, you will find a structure like the followingstructObjc_class {class ISA objc_isa_availability;#if!__objc2__Class Super_class objc2_unavailable;Const Char*name objc2_unavaila

expression enclosed in ' [] ' is a message. Includes a target, the object to receive the message, a method to be called, and some arguments you want to pass. A call similar to a C function, but different. In fact, the above statement simply conveys the OBJC message and does not necessarily mean that it will be executed. Target This object detects who initiated the request, and then the decision is to execute the method or another method, or forward it to another object. ClassThe definition of

modular drivers. In this way, you do not need to issue many kernels. each kernel has a different built-in driver. Use a single basic kernel. if a specific user system needs it, once the system is started, it will be sufficient to file from the driver module (usually stored in/lib/modules /). 　　 Use the driver as a module: for PCI drivers, the module usually automatically detects all installed NICs of this brand type. However, for an ISA Nic, it is in

A chip from the birth of demand to the final chip packaging success, need to go through a very long process. If it's some kind of non-programmable chip,Compared to the new Isa, the two types of chips corresponding to the software workload, is not at an order of magnitude. Non-programmable chip, does not require the ISA design, does notNeed compiler design, and these two parts of the software, whether from t

In relation to object C in object, class, Meta class, the following call is in the source code of OBJC4:After the LIBOBJC Dynamic library is called, the following function calls in turnAsm_map_images:...JMP _map_2_imagesMap_2_imagesMap_images_nolock_read_images_objc_connect_classes_from_imageConnect_classReally_connect_classSet_superclass/************************************************************************ Objc_allocateclass.*******************************************************************