Cls Magic X86 Verified May 2026

After this, you must manually move the cursor back to the start:

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. cls magic x86

While we now work in high-resolution GUI environments, the logic of "CLS" remains fundamental for several reasons: After this, you must manually move the cursor

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? Whether you're building a retro game or just

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

To clear an 80x25 screen, you need to write 2,000 spaces (ASCII 20h) to memory.