Stored program

Stored program concept

Instructions and data are stored in the same memory

Instructions are simply another kind of data

Instructions are executed sequentially unless branch elsewhere or stop

Fetch-execute cycle

- Instruction fetch

Get the next instruction from memory

- Decode

Figure out what operation to perform on which operands

- Operand fetch

Get the operand values

- Execute

Perform the operation

- Store result

Repeat until done