Pemrosesan Data Pada Komputer

Summary

This video explains the intricate process of how a keyboard input is processed by a computer. It covers the journey of a key press, from the initial electrical signal sent to the keyboard processor, to the character mapping and binary conversion. The signal is then passed through the keyboard controller, the motherboard's southbridge chipset, and the processor’s control unit. After being processed and stored in a register, the input is sent to the ROM BIOS, and ultimately, the character is displayed on the monitor via the VGA card. The process is detailed step-by-step, emphasizing the role of each component in this seamless action.

Takeaways

• 😀 The process begins when a key on the keyboard is pressed, completing a circuit and creating an electric current.
• 😀 The keyboard processor matches the input with a character map to determine which key was pressed.
• 😀 The input is then converted into binary code for further processing by the system.
• 😀 The keyboard processor sends the command to the keyboard controller to inform whether the key is still pressed or released.
• 😀 The keyboard controller communicates with the system’s mainboard via a bus, ensuring smooth transmission of data.
• 😀 On a Gigabyte motherboard, the southbridge chipset manages keyboard and mouse bus communication and bridges PCI connections.
• 😀 The command is passed to the processor’s control unit, where it is stored temporarily in a register.
• 😀 After processing, the control unit sends signals that trigger actions based on the processed command.
• 😀 The command is transferred to the ROM BIOS chip, which acts as firmware storage for fast execution of operations.
• 😀 The input is processed and converted into the desired character (e.g., 'B') for display on the screen.
• 😀 The processed signal is sent through the VGA card and transmitted via a VGA cable to the monitor, where the character appears on the screen.

Q & A

What happens when a key is pressed on a keyboard?

When a key is pressed, an electrical signal is generated and sent to the keyboard processor, which identifies the corresponding key from the character map and converts it into binary code.

How does the keyboard processor determine which key was pressed?

The keyboard processor checks the character map to match the electrical signal generated by the pressed key with the correct character or key code.

What role does the keyboard controller play in the process?

The keyboard controller acts as a bridge between the keyboard processor and the motherboard, relaying information about whether a key is still pressed or has been released.

How does the system communicate the keypress to the motherboard?

The binary code generated by the keyboard processor is sent through the system bus to the motherboard's Southbridge chipset, which handles input/output communication.

What does the CPU's control unit do with the input data?

The control unit of the CPU processes the input data, stores it temporarily in a register, and then sends the processed result to the ROM BIOS.

What is the function of ROM BIOS in this process?

ROM BIOS stores the system's firmware, allowing the quick execution of input commands and supporting the interaction between hardware components like the keyboard and CPU.

Why is the keyboard controller involved twice in the process?

The keyboard controller is involved twice to first relay the processed input back to the motherboard and then verify the accuracy of the input before it is displayed on the screen.

How does the final character appear on the screen?

The processed input is sent to the VGA card through a cable, which then displays the corresponding character on the monitor.

What is the role of the Southbridge chipset in this system?

The Southbridge chipset manages the communication between various peripheral devices like the keyboard and mouse and ensures proper data transfer between them and the CPU.

What would happen if the key's input did not reach the control unit?

If the input did not reach the control unit, the keypress would not be processed, and no action would occur on the screen or in the system, causing the input to be lost.