Both of them are pointers, but otherwise they are completely unrelated. The former points to the current position of the stack, the latter points to the current instruction of the program.
There isn't any difference. Two different words forexactly same thing. Third way to call it is instruction address register.
Program Counter is just a synonim for Instruction Pointer.
Pointer to Pointer is a double pointer, denoted by (**). Pointer stores the address of the variable and pointer to pointer stores the address of a pointer variable and syntax can be given as int **ptr2ptr;
This error message means that somewhere in your program you have used a pointer-varible containing NULL-value. (Within an actual OS it with stop the program immediately, but in MS-DOS it doesn't.)
a sprite is a computer program that moves.
The stack pointer keeps track of the top of the stack used by the current thread. The program counter keeps track of the next instruction in a program. Both are registers and both store a memory address.
There isn't any difference. Two different words forexactly same thing. Third way to call it is instruction address register.
Synonym for Instruction Pointer.
Program Counter is just a synonim for Instruction Pointer.
In 8085 program counter stores the address of the next instruction which is to be fecthed.same function is performed by instruction pointer in 8086.
The Instruction Location Counter is a variable inside of the assembler. While the Program Counter is a register. The PC solely keeps track of the next instruction in a program, ILC increments by each instruction's operand length.
The program counter (PC) and stack pointer (SP) registers are 16-bit registers in the 8085 and in the 8086/8088 because that is how Intel designed the processors.
The program counter (PC) and the stack pointer (SP).
The most significant difference between the Intel 8085 and 8086 microprocessors is that the 8085 is an 8-bit system and the 8086 is a 16-bit system. This difference allows the 8086 system to have a much larger set of operational instructions and can make calculations to more significant places. Note: the 8085 processor does have two 16-bit registers. The pointer and the program counter.
function pointer is a variable that hold the address of any function which declared in the program but function pointer is the array of the function that accept the run time size of the function.
Because that's how Intel designed it. Even though the 8085 is an 8-bit computer, the program counter and stack pointer are 16 bits wide in order to support the address bus, which is also 16 bits wide. In the case of the 8086/8088, the program counter and stack pointer are still 16 bits wide, even though the address bus is 20 bits wide, because the 8086/8088 adds segmentation through the 16 bit segment register which is left shifted by 4.
The Program Counter and Stack Pointer registers are called special purpose registers because they can not be used arbitrarily; they are, well, special. You cannot, for instance, load a new value into the Program Counter and blithely continue, that action would cause an unconditional jump. Also, the Program Counter is automatically incremented by the size of the instruction, so you can not just put something in it and expect its value to persist. Similarly, you cannot load a new value into the Stack Pointer without losing the entire stack context that you are in.