In IBM System/360 Assembly 'DROP' undoes 'USING', example:
BASR 12,0
USING *,12
...
XR 12,12
DROP 12
in RST interrupt , RST STAND FOR
Assembly is signficantly shorter and easier to remember than the equivilant machine instructions. Assembly instructions are human readable characters, for which a direct translation exists to the binary machine code instructions. Pseudo example: add <- assembly instruction 1010101010 <- machine instruction
It doesn't. Pseudo code isn't a programming language, it is just there to give an idea of how you could write a program.
Manual coding of 8086 is difficult hence we use a assembler or a compiler. Note that the microprocessor should be able to interpret your discussions via the program. Suppose if the instruction corresponds to word(16 bits), we use assembler directive WORD PTR, but when assembler is contacting the processor it sets a bit called 'w' indicating its a byte operation.
Assembly language to machine code translation is a "one to one" translation process, as every individual instruction expressed in the assembly language corresponds to exactly one machine instruction. Note this does not hold for pseudo instructions or expanding macros, which are supported by some assemblers.
A pseudo-op is an assembly language instruction that specifies an operation of the assembler i.e about the base register & its contents e.g. USING instruction. On the other hand, a machine-op instruction. That represents a machine instruction to the assembler e.g. BR instruction is a machine-op instruction
The instruction represented by this code depends entirely on the architecture that you are trying to translate it for.
Pseudo code is in itself a language on its own. Pseudo codes are used to describe algorithms in computer science. This language, unlike a programming language is used for human specific understanding and abstract representation of a certain procedural flow of a program. Pseudo code cannot be executed in a computer based environment. Pseudo code eliminated unnecessary programming structures and only focuses on the flow process of the algorithm. It includes programming language specific constructs and natural human language constructs to explain the functioning. This is unlike a computer programming language where strict rules and procedures are laid down, which have to be followed to execute the particular code.
Structured English is a subset of English language used to represent program logic in a clear and structured manner, while pseudo code is a high-level description of an algorithm that uses a mixture of natural language and programming language syntax. Pseudo code is closer to actual programming language syntax compared to structured English, which is more focused on readability and understanding by non-programmers.
A programming language is a well defined set of rules and commands which can be combined to tell a computer what to do as a computer program. Pseudo-code is like a "rough draft" of a program where the programmer outlines what they want the computer to do, but they do not write any actual code. While there are various definitions for "proper" pseudo-code, most programmers just write in their own combinations of English (or their speaking language of choice) and various bits of actual code from real programming languages.
Pseudo-opcodes are not actual machine-level instructions but instead are mnemonic codes used by programmers to simplify assembly language programming. They are translated into one or more real opcodes by the assembler during the compilation process.
== ==