In old NES games, why would graphical glitches cause graphics to turn into numbers?

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It doesn’t happen often but I’ve seen it a few times. Why would NES graphics turn into numbers when they glitch out?

In: Technology

4 Answers

Anonymous 0 Comments

It’s because the glitch overwrites a memory pointer and graphics are stored at specific memory locations as a”Sprite sheet” which has all the graphics at specific location offsets. Think of a chess board with a graphic in each square. They are usually referenced using math offsets, and some squares are larger or smaller (text). When the pointer or variable is overwritten, like for example the start position of the image, or the Y axis, then you end up getting the wrong part of the image. There are literally thousands of ways a glitch can happen, or what it does, but in this instance it broke the image reference.

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