Traditional Culture Encyclopedia - Photography major - The principle of microcomputer interrupts the periodic information flow. SP is the stack pointer, and SP represents the top address of the stack. What does information flow mean: CU control (SP)- 1?
The principle of microcomputer interrupts the periodic information flow. SP is the stack pointer, and SP represents the top address of the stack. What does information flow mean: CU control (SP)- 1?
The stack is a data structure, which is an 8-bit register indicating the position of the top of the stack in the internal RAM. After the system is reset, the initial value of SP is 07H, which makes the stack actually start from 08H. Because sp has the property of automatically adding 1. After reset, sp indicates the bottom of the stack, and it increases upward with the increase of sp, so sp indicates the address of the top of the stack.
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