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Instruction set architecture (ISA)

Interface between hardware and low-level software
Comprises everything compiler designer (assembler programmer) need to know to write correct program

Property	Description
Operations	What categories of operations exist? Examples: data transfer, arithmetic, logical, control, floating point
Class	Where are operands of ALU-instructions located? Examples: register, memory
Memory addressing	What is smallest number of bytes I can access? Must data be aligned? What is byte order in memory? Examples: byte addressing, memory alignment, byte order (endianness)

Property

Description

Operations

What categories of operations exist?

Examples: data transfer, arithmetic, logical, control, floating point

Class

Where are operands of ALU-instructions located?

Examples: register, memory

Memory addressing

What is smallest number of bytes I can access?
Must data be aligned?
What is byte order in memory?

Examples: byte addressing, memory alignment, byte order (endianness)

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owner: pavestonelaboringuntitled - (no access) - 01 Introduction.pdf, p33

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