Seneca Von Nuemann arccc Flashcards
ALU
performs all of the arithmetic and logical operations of the CPU
Control Unit
transmits control signals to other components of the CPU
follows the fetch-decode-execute cycle to execute program instructions
What are the components of the Control Unit
Clock which coordinates CPU’s activity
Decoder which decodes program instructions
Registers
tiny amounts of super-quick memory within the CPU.
Hold information needed for the CPU to work
Each register holds a specific peice of info
What are the names of the registers
PC, MDR, ACC, MAR
What does the PC do
holds the memory location address of the next instruction to be performed by the CPU.
What does MDR do
MDR holds the data that has been retrieved from memory, or that is about to be stored in memory.
What does ACC do
holds the result of calculations and operations performed by the arithmetic logic unit (ALU).
What does MAR do
holds the address of the location in memory where data is to be retrieved or stored.
