Retro BIOS Terminal — ASCII Boot Animation with Source Code

Q: How do I add a blinking cursor?

Add a ` _ ` to the end of the content with a CSS animation that toggles its `visibility` between `hidden` and `visible` every 0.5s.

The Retro BIOS Terminal is a nostalgic immersion into the 1980s computer experience. It combines a glowing green phosphor aesthetic with scanlines, CRT-style flickers, and a sequential “boot up” sequence that types out system information, creating the ultimate retro-tech vibe.

How It Works

The authentic look is achieved through CSS layering. A .scanlines div with a repeating linear-gradient creates the horizontal lines, while a radial-gradient on the parent .monitor simulates the glass screen’s highlight. The flickering effect is a high-speed opacity keyframe animation. The text behavior is handled by a simple JavaScript “typewriter” array that progressively adds lines to the view with randomized delays to mimic slow 8-bit processing.

Use Cases

Portfolio “About Me” sections with a developer focus
Creative “System Loading” splash screens
Error 404 pages with a “system failure” theme
Cinematic intro sequences for games or retro-styled apps

How to Customize

Change Text Color: Modify the color and text-shadow in the CSS (e.g., use #ffb000 for an Amber vintage screen).
Edit Boot Sequence: Change the lines array in the JavaScript to display your own custom messages or tool metadata.
Adjust “Age” of Monitor: Increase the opacity of the .scanlines or the intensity of the flicker animation for a “broken” or older monitor feel.

Frequently Asked Questions

Can I make the text scroll?

By default, the text adds new lines. To make it scroll like a real terminal, you can set a fixed height on the .content div and use scrollTop = scrollHeight in the type() function every time a new line is added.

How do I add a blinking cursor?

Add a <span>_</span> to the end of the content with a CSS animation that toggles its visibility between hidden and visible every 0.5s.

Is it readable?

While the scanlines and flicker are authentic, they can be distracting for long-form reading. This effect is best used for short “intro” sequences or decorative headings rather than primary content.

Retro BIOS Terminal