Titlebook: Introduction to Low Level Programming for Microprocessors; J. C. Cluley Textbook 1987Latest edition Macmillan Publishers Limited 1987 micr

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Instruction Formats and Address Modes,All microprocessor instructions comprise a whole number of bytes; the first always contains the operation code (often abbreviated to op. code). If the instruction does not need to specify an operand or its address, this single byte suffices. Some examples are given below in the customary hexadecimal coding.

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Programming the 68000,The 68000 instruction set provides instructions for performing addition, subtraction and negation with three data sizes. The resolution obtained will be

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Microprocessor Registers and their Functions,orage elements inside the central processor. Consequently, before discussing the action of different instructions it is necessary to understand the way in which microprocessor registers are used and their particular functions. Not all microprocessors have the same set of registers, but all of them have one or more

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Aids to Program Writing and Testing,ables, etc. These extra commands are called assembler directives or pseudo-operation statements where they affect the operation of the assembler, and assignment statements where they identify a name with a value or an address. Thus the command which tells the assembler where to load the first instru

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Introduction to Low Level Programming for Microprocessors

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Microprocessor Registers and their Functions,orage elements inside the central processor. Consequently, before discussing the action of different instructions it is necessary to understand the way in which microprocessor registers are used and their particular functions. Not all microprocessors have the same set of registers, but all of them h