Theállapotregiszter

Theállapotregiszter, meaning "status register" in Hungarian, is a key component within certain computing architectures, particularly those found in embedded systems or specialized microcontrollers. It is a hardware register that stores the current state of the processor or a specific functional unit. This state typically includes flags that indicate the outcome of arithmetic or logical operations, interrupt requests, or the operational mode of the system.

When an instruction is executed, the állapotregiszter is updated to reflect the result. For example, a flag might be set to indicate if an addition resulted in an overflow, if a comparison yielded equality, or if a particular condition has been met. These flags are crucial for conditional branching, allowing the program flow to change based on the outcome of previous operations. Interrupts, which are signals from external devices or internal events that require immediate attention, are also often reflected in the status register.

The exact set of flags within the állapotregiszter varies depending on the specific processor architecture. Common flags include the Zero flag (Z), which indicates if the result of an operation is zero, the Carry flag (C), which signifies a carry-out or borrow, and the Negative flag (N), which reflects the sign of the result. Other flags might control interrupt enable/disable states or indicate the current processor mode, such as user mode or supervisor mode. Programmers interact with the állapotregiszter indirectly through assembly language instructions that test these flags or directly through privileged instructions that modify them.