this post was submitted on 22 Sep 2024
218 points (95.0% liked)

Games

16926 readers
1772 users here now

Video game news oriented community. No NanoUFO is not a bot :)

Posts.

  1. News oriented content (general reviews, previews or retrospectives allowed).
  2. Broad discussion posts (preferably not only about a specific game).
  3. No humor/memes etc..
  4. No affiliate links
  5. No advertising.
  6. No clickbait, editorialized, sensational titles. State the game in question in the title. No all caps.
  7. No self promotion.
  8. No duplicate posts, newer post will be deleted unless there is more discussion in one of the posts.
  9. No politics.

Comments.

  1. No personal attacks.
  2. Obey instance rules.
  3. No low effort comments(one or two words, emoji etc..)
  4. Please use spoiler tags for spoilers.

My goal is just to have a community where people can go and see what new game news is out for the day and comment on it.

Other communities:

Beehaw.org gaming

Lemmy.ml gaming

lemmy.ca pcgaming

founded 2 years ago
MODERATORS
[email protected]
218
Huge Half-Life discovery found from a decades-old CD sitting in a storage unit (www.pcgamesn.com)
submitted 2 months ago by [email protected] to c/[email protected]
82 comments fedilink hide all child comments
you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 9 points 2 months ago (1 children)

It wasn't the colour, you would burn little bubbles into the disk. The bubbles would deflect a laser and flat parts would not. This would give the 0 or 1 bits.

There were CD- and CD+ versions. I don't know which is which but one would create a divot, and the other would create a bubble. Either way the laser is diverted away from the sensor.

[–] [email protected] 3 points 2 months ago (1 children)

Ah, that's what it was! I always thought it was just a different color for 0 and 1, today I learned! That makes more sense when I think about it.

[–] [email protected] 6 points 2 months ago (2 children)

CD - red laser

BlueRay - blue laser.. shorter wavelength --> more data on same size disk

and inbetween there was DL - dual layer
light scribe - could etch a picture on the top of the cd
and RW - rewriteable CDs

(CD is short for compact disc)

[–] [email protected] 1 points 2 months ago

light scribe

I remember having one, but I never actually etched a picture onto the CD, it never seemed worth doing.

[–] [email protected] 1 points 2 months ago (1 children)

CDs like laserdiscs before them are read with an infrared laser.

DVDs use a red laser, and Blu-ray does indeed use a blue-violet laser. The smaller wavelengths, plus the ability to do multiple layers, are indeed how they cram more data more densely onto a disc of nearly identical size.

[–] [email protected] 1 points 2 months ago

I stand corrected. thx