Live data from Hacker News

NES Graphics – Part 3

dustmop.io

1–10 of 23 posts

Re: NES Graphics – Part 3

#6

Does the electron gun physically move, though? I thought it was fixed and the beam is just steered with magnets.

No the gun does not move. The author appears to have misunderstood this. I don't find it likely that he would have used the words "physically moves to point" if he meant that the electron beam is deflected magnetically. Still, great article.

Re: NES Graphics – Part 3

#7

Does the electron gun physically move, though? I thought it was fixed and the beam is just steered with magnets.

The gun fires straight ahead. The electrons it produces are deflected in the desired direction by electromagnets.

I don't think it's possible to create a mechanical way of moving the gun fast enough to achieve the needs of even a low-res TV screen. If it was a physical mechanism, you can imagine it'd break all the time.

Re: NES Graphics – Part 3

#8

Does the electron gun physically move, though? I thought it was fixed and the beam is just steered with magnets.

The gun fires straight ahead. The electrons it produces are deflected in the desired direction by electromagnets. I don't think it's possible to create a mechanical way of moving the gun fast enough to achieve the needs of even a low-res TV screen. If it was a physical mechanism, you can imagine it'd break all the time.

Not to mention your TV would sound like it was possessed by a banshee from the servo (presumably) noise.

Re: NES Graphics – Part 3

#9

Does the electron gun physically move, though? I thought it was fixed and the beam is just steered with magnets.

The gun fires straight ahead. The electrons it produces are deflected in the desired direction by electromagnets. I don't think it's possible to create a mechanical way of moving the gun fast enough to achieve the needs of even a low-res TV screen. If it was a physical mechanism, you can imagine it'd break all the time.

There was such a thing as a mechanical television:

https://en.wikipedia.org/wiki/Mechanical_television

Post reply on HN