Which register is used for counting purpose?
CX is known as the count register, as the ECX, CX registers store the loop count in iterative operations. DX is known as the data register. It is also used in input/output operations. It is also used with AX register along with DX for multiply and divide operations involving large values.
What is a count register?
Although a Counter Register is 16-bits wide, only the 14 Least Significant bits of the register are used to specify the number of bytes which are to be transferred using Direct Memory Access scheme. So for data transfer maximum 214 = 16K = 16,384 bytes can be programmed.
What is the purpose of register?
Registers are a type of computer memory used to quickly accept, store, and transfer data and instructions that are being used immediately by the CPU. The registers used by the CPU are often termed as Processor registers.
What is a special purpose register?
A special purpose register is one that has a specific control or data handling task to carry out. There are a number of special purpose registers within the CPU. The diagram above shows that the CPU contains a number of registers in order to process data and to follow program instructions.
What is the main difference between a register and a counter?
Explanation: The main difference between a register and a counter is that a register has no specific sequence of states except in certain specialised applications. Explanation: D stands for “data” in case of flip-flops and not delay. Registers are made of a group of flip-flops.
What are registers and counters?
∎ Register is a group of binary cells suitable for holding. binary information. ∎ A counter is essentially a register that goes through a. predetermined sequence of states.
How does a register work?
Registers are temporary storage areas for instructions or data. Registers work under the direction of the control unit to accept, hold, and transfer instructions or data and perform arithmetic or logical comparisons at high speed.
What are the types of register?
There are different types of Registers that are used. Some of the most used Registers are accumulator, data register, address register, program counter, memory data register, index register, and memory buffer register. The various operations are performed with the use of register.
Which of the following is an example of special purpose register?
3 Answers. Special purposes register are, as the name implies, registers which are designed for just a task. For example, cs , ds , gs and the other segment registers fall into the special purpose registers, because they exist to hold segments’ number.