Live December 2020
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Set your start and end points and Snonav will instantly give you the best and quickest route.
Live in-ear audio instructions at every turn means no more stopping to look at the map.
Share your location or a meet-up location and let Snonav guide everyone there.
Set your preferences, plan your route, get in-ear turn-by-turn directions so you can navigate the mountain with ease and meet up with friends and family
While we now work in high-resolution GUI environments, the logic of "CLS" remains fundamental for several reasons:
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 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
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 clear the screen, programmers use the "Scroll Window Up" function ( AH = 06h ). By setting the number of lines to scroll to zero, the BIOS clears the specified region. While we now work in high-resolution GUI environments,
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:
Many industrial x86 systems still operate in text mode for diagnostic displays. Here is a deep dive into the mechanics,
If you are writing a bootloader or a hobbyist OS, you must implement your own screen-clearing routine to handle kernel output.
