Magic X86 Better - Cls

mov ax, 0B800h ; Point to video memory segment mov es, ax xor di, di ; Start at offset 0 mov ax, 0720h ; 07 = White/Black, 20 = Space character mov cx, 2000 ; 80 * 25 = 2000 words rep stosw ; "Magic" happens here: Repeat storing AX into ES:DI Use code with caution.

By writing directly to this memory block, you could clear the screen instantly. Each character on the screen takes up two bytes: The ASCII character. Byte 2: The Attribute (Color). The "Magic" Loop:

mov ah, 02h ; Set cursor position function mov bh, 00h ; Page number mov dx, 0000h ; Row 0, Column 0 int 10h Use code with caution. Method 2: Direct Video Memory Manipulation (The "Fast" Way) cls magic x86

mov ah, 06h ; Scroll up function mov al, 00h ; AL = 0 means clear the entire window mov bh, 07h ; BH = Attribute (07h is white text on black background) mov cx, 0000h ; CH, CL = Upper left corner (0,0) mov dx, 184Fh ; DH = 24 (Rows), DL = 79 (Cols) int 10h ; Call BIOS Use code with caution.

Whether you're building a retro game or just curious about how computers work under the hood, mastering the screen clear is your first step toward total control of the machine. AI responses may include mistakes. Learn more mov ax, 0B800h ; Point to video memory

Here is a deep dive into the mechanics, the code, and the history behind clearing the screen in x86 environments. The Concept: What Does "CLS" Actually Do?

To perform the magic, you simply need to decide between (BIOS interrupts) or raw performance (direct memory access). Both methods reflect the core philosophy of x86: giving the programmer total control over the hardware. Byte 2: The Attribute (Color)

Many industrial x86 systems still operate in text mode for diagnostic displays.