hardware Flashcards

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1
Q

Von neuman architecture

A

concept that a computer would hold programs and data, consits of CPU storage input output

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2
Q

CPU

A

processing unit

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3
Q

register

A

internal memory location within the cpu that holds data.

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4
Q

ALU

A

arithmetic and logic unit

carries out calculations on data. logic part carries out comparisons.

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5
Q

accumulator

A

register used for arithmetic and logic

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6
Q

Control unit

A

internal part of the CPU
controls flow of data
controls interactions

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7
Q

CIR

current instruction register

A

contains the current instruction being proccesed

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8
Q

PC

A

this register contains the adress for the next instruction

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9
Q

Immediate access storage

A

memory found inside a CPU - used to hold data, instructions. CPU memory

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10
Q

cache memory

A

portion of memory for high speed storage

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11
Q

Memory unit

A

made up of a number of partitions. partition - consits of an adress and its contents. unique identificatiion

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12
Q

MAR

A

stores memory address from which data will be fetched. holds memory location of data that needs to be accesed

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13
Q

MDR

A

register that contains data to be stored.

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14
Q

address BUs

A

carries signals relating to addresses between processor and memory. uni directional

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15
Q

Data bus

A

sends data between processor and the memory unit and the input/ output devices. BI - directional

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16
Q

control bus

A

carrries a signal releating to the control and coordination of activities. Both UNI and BI directional due to internal connections

17
Q

FETCH DECODE EXCECUTE

A
  1. The PC address of the next instruction
  2. The address copied to the MAR via address bus.
  3. The instruction is copied from memory location contained in the MAR and is placed in the MDR.
  4. The entire instruction is then copied from the MDR and placed in the CIR
  5. The value in the PC is then incremented so that it points to the next instruction
  6. The address part of the instruction is placed in the MAR
  7. The instruction is finally decoded and is then executed.