Special Registers

Descripción

Describes the different registers in the CPU
Jonathan Wakefield
Fichas por Jonathan Wakefield, actualizado hace más de 1 año
Jonathan Wakefield
Creado por Jonathan Wakefield hace más de 7 años
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Resumen del Recurso

Pregunta Respuesta
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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