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The XLAT instruction in the 8086 assembly language is used to translate a byte in the AL register using a lookup table pointed to by the BX register. The effective address of the lookup table is determined by the value in AL, which is used as an index to fetch the corresponding byte from the memory location pointed to by BX. Here's a simple example program:
MOV BX, OFFSET lookup_table ; Load the address of the lookup table
MOV AL, [some_index] ; Load the index into AL
XLAT ; Translate AL using the lookup table
; AL now contains the translated value
In this context, lookup_table would be an array of bytes, and some_index holds the index for the translation.
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General categories of computer languages?
*Low-level languages -- "natural language" of a computer & such as , is defined by its hardware design.. it is also a machine dependent, can be used on only one type of a computer. *assembly languages -- a set of instruction that a programmer can used to create program for use on a specific proccessor. *High-level languages -- that provide s some level of abstractions from assembler language & independence from a particular type of machine.
What type of computer languages uses English-like abbreviations for machine-language instructions?
The assembly languages provide human-readable mnemonics, one for each machine instruction. Most assembly language instructions have similarities to words from the English language (e.g. ADD, MOVE, LOAD). However, it is possible that assembly languages are defined in resemblance to other human languages, or none at all. For example, processors designed in and predominantly used in countries with a different language and script might define assembly instructions more familiar and easier to use by its target audience. For example, it is possible that Chinese processors define assembly language instructions without resemblance to English.
Can you program a z80?
Yes, I can help you program a Z80 microprocessor. The Z80 uses assembly language, which consists of mnemonics for instructions that the processor can execute. If you have specific tasks or programs in mind, I can guide you through the coding process or provide examples. Let me know what you need assistance with!
How do you hack Virtual DJ?
You buy the program if you want to use it. Answers.com does not provide instruction or codes to promote software piracy.
What are the steps in developing an assembly language program?
Assembly language uses mnemonic code, abbreviations for machine instructions using a human readable and memorable form. This make it much more readable to humans. For example, one instruction may be called Add, another one may be called Move.These elements are called Machine Code Instruction(s).Machine instructions and their corresponding mnemonic codes are defined for each processor, and are generally unique for each processor family.In addition to mnemonic codes for machine instructions, assembly languages also support directives and pseudo instructions.Directives are used to instruct the assembler how to assemble code. For example, a directive might say "the following code will reside in immutable memory (ROM)," another directive might say "the following code will start at a fixed memory location of address 12345." Examples for directives include common directives such as SEG and ORG. However, the syntax and set of directives are defined by the assembler program and are not standardized.Pseudo-instructions are used to control conditional assembly (e.g. IF, ELSE, ENDIF), definition and use of macros, and other tools that allow efficient programming in assembly.
What do we call an instruction given by the user to a particular question displayed by the program on the computer?
An instruction given by the user in response to a question displayed by a program is commonly referred to as an "input." This input can take various forms, such as text, selections, or commands, depending on the program's interface. It allows users to interact with the software and provide the necessary information for processing.
What is the purpose and functionality of an assembly language?
Assembly language is a low-level programming language that is used to communicate directly with a computer's hardware. Its purpose is to provide a more human-readable way to write code that can be translated into machine code, which the computer can understand and execute. Assembly language allows programmers to have more control over the hardware and optimize performance, making it ideal for tasks that require speed and efficiency.
What circumstances does it still make to program in machine level and assembly level language?
Only when a high-level language cannot create the desired machine code. This is rarely necessary given that C++ (for example) is specifically designed so that the need to write code in a lower-level language (such as C or assembly) is extremely rare. A typical example is when a new machine architecture is conceived for which there (currently) would be no high-level language implementations available. Given the complexities involved in creating (or modifying) high-level compilers to cater for a new architecture, the manufacturer will initially provide a low-level assembler which is obviously much simpler to implement given the much reduced abstraction involved. Until higher level languages begin to emerge, the assembly language is the only way to program the new architecture.
What do webmaster tools provide users with?
If you are like me with little knowledge about how computer functions, and where important options are then webmaster can help you out greatly. It provide with step by step instruction and guides you through the troubleshooting using user friendly language.
WHO INVENTED ASSEMBLY LANGUAGE OF COMPUTER?
Assembly language was not invented by a single individual but rather evolved in the early days of computing as a way to provide a more human-readable representation of machine code. The first assembly language is often attributed to the work done on the ENIAC (Electronic Numerical Integrator and Computer) in the 1940s, where early programmers developed symbolic representations for machine instructions. Over time, different assembly languages were created for various computer architectures, adapting to the specific needs of those systems.
What kind of assembly services does the company PCB offer?
Usually PCB factories do not provide assembly work, some companies have partners will provide assembly work.
Why assembly language is still needed if you have hll offering sophisicated tools?
Yes, assembly language is definitely still used. Many I/O drivers and much of the bootstrap code that starts a computer must be written in assembly language as high level languages do not provide means for coding certain special purpose instructions needed for these operations. Also high level languages usually require that subroutine library codes be available, while assembly language does not. As these subroutine library codes usually cannot be loaded until the Operating System is up and running, assembly language must be used for much of the code that bootstraps the computer and loads the Operating System.
