What is the size of stack pointer in 8085?
Discussion Forum
| Que. | In 8085 microprocessor, what is the length of SP (stack) pointer? |
|---|---|
| b. | 8 bits |
| c. | 12 bits |
| d. | 16 bits |
| Answer:16 bits |
What is the purpose of stack pointer in 8085?
Stack Pointer: It is used as a memory pointer. It points to a memory location in read/write memory, called the stack. It is always incremented/decremented by 2 during push and pop operation. Here two binary numbers are added.
What is stack in CPU?
The stack is a list of data words. It uses Last In First Out (LIFO) access method which is the most popular access method in most of the CPU. A register is used to store the address of the topmost element of the stack which is known as Stack pointer (SP). After manipulation, the result is placed in the stack.
Is stack in RAM or CPU?
Stack is always in RAM. There is a stack pointer that is kept in a register in CPU that points to the top of stack, i.e., the address of the location at the top of stack. From Wiki: The stack area contains the program stack, a LIFO structure, typically located in the higher parts of memory.
What is Cache RAM?
Cache memory is an extremely fast memory type that acts as a buffer between RAM and the CPU. It holds frequently requested data and instructions so that they are immediately available to the CPU when needed.
Is CPU cache important?
Cache memory is important because it improves the efficiency of data retrieval. It stores program instructions and data that are used repeatedly in the operation of programs or information that the CPU is likely to need next.
Which is slowest memory?
A typical computer has 3 types of memory: Cache memory, Random Access Memory (RAM), and virtual memory. Cache is the fastest and most expensive, RAM is slower and less expensive, and virtual memory is the slowest and least expensive type.
What is the slowest storage system?
Cache memory must be loaded in from the main system memory (the Random Access Memory, or RAM). We are also familiar with the long time a program can take to load from the hard disk — having physical mechanisms such as spinning disks and moving heads means disks are the slowest form of storage.