Terms in Computer Architecture
The following is a list of terms used in computer architecture.
Accumulator: It is a tri-state 8-bit register.
Analog – A representation of a physical continuous quantity. An analog voltage or current can have any value within a defined range.
Digital: A representation of a physical quantity by a series of binary numbers.
A digital representation can have only specific discrete values.
Instruction Format: The layout of the instruction is called instruction format
Logic level: A voltage level that represents a defined digital state in an electronic circuit.
Logic LOW: Logic 0. The lower of two voltages in a digital system with two logic levels
Logic HIGH: Logic 1. The higher of two voltages in digital system with two logic levels
Positive Logic: A system in which logic LOW represents binary digit 0 and logic HIGH represents binary digit 1.
Negative Logic: A system in which logic LOW represents binary digit 1 and logic HIGH represents binary digit 0.
Machine code: Sequence of instructions in machine language
Machine language: Numeric version of instructions
PC: Program Counter. It is a register acting as pointer to the next instruction
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