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Special Registers

Description

Describes the different registers in the CPU

Flashcards by Jonathan Wakefield, updated more than 1 year ago

	Created by Jonathan Wakefield over 7 years ago

29

1

Resource summary

Question	Answer
MAR	Memory Address Register - Used to hold the address of the data in memory
MDR	Memory Data Register - Used to hold the data retrieved from memory or data to be sent to memory
PC	Program Counter - Holds memory address of the next instruction. Indicates where computer is in programme sequence.
Acc	Accumulator - Register in which results from arithmetic and logic are stored.
CIR	Current Instruction Register - Holds current instruction to be executed having been fetched from memory. Stores operator and operand for current instruction

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