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Parts of the CPU (Registers (Program Counter (PC) holds the address of the…
Parts of the CPU
Registers
- Program Counter (PC) holds the address of the next instruction to be executed
- Current Instruction Register (CIR) holds the current instruction being executed divided into operand and opcode
- Memory Address Register (MAR) holds the address of the memory location from which data is going to be fetched from or where data is going to be written
- Memory Data Register (MDR) used to temporarily store the data read from or written to memory
- Accumulator stores the results of calculations carried out in the ALU
Buses
Control Bus
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purpose to transmit command, timing and specific sstatus infomation between system components
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