What does Lea mean in assembly?
As others have pointed out, LEA (load effective address) is often used as a "trick" to do certain computations, but that's not its primary purpose. The x86 instruction set was designed to support high-level languages like Pascal and C, where arrays—especially arrays of ints or small structs—are common.
a register is a small bit of memory that sits inside the CPU. and is used by assembly language to perform various tasks.
- EIP is a register in x86 architectures (32bit). It holds the "extended instruction pointer" for the stack. In other words, it tells the computer where to go next to execute the next command and controls the flow of a program. Research Assembly language to get a better understanding of how registers work.
- A memory buffer register (MBR) or memory data register (MDR) is the register in a computer's processor, or central processing unit, CPU, that stores the data being transferred to and from the immediate access storage. It contains the copy of designated memory locations specified by the memory address register.
- The MOV instruction. The MOV instruction is the most important command in the 8086 because it moves data from one location to another. It also has the widest variety of parameters; so it the assembler programmer can use MOV effectively, the rest of the commands are easier to understand. format: MOV destination,source.
Updated: 3rd December 2019