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5 votes

How did wolfenstein do 3D graphics when 3D graphics couldn't exist?

Wolfenstein 3D used ray tracing/ray casting, but only in one screen dimension (two world dimensions). For each of the 300-or-so screen columns, it cast a ray through the 2D world to find the ...
benrg's user avatar
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25 votes
Accepted

How did wolfenstein do 3D graphics when 3D graphics couldn't exist?

Did they use trigonometric functions to place every pixel on the screen independently? Yes, exactly. And, well, not quite. As you've said, without any kind of accelerated drawing hardware, a ...
knol's user avatar
  • 12.5k
-1 votes

Using the reset button to enable double firing in Space Invaders on the Atari VCS\Atari 2600: was it a glitch or a hidden feature?

If it were intentional, they wouldn't trigger it by repeatedly jamming the reset switch. It would be a secret key combination or something controllable. It's a bug, not a feature.
Jess Fuckett's user avatar
4 votes

Is there a technical reason why Datel Action Replay on PC required a card?

I understand that it's necessary to use hardware in some cases (e.g. action replay for an 8-bit console such as the NES) but for the PC it's less obvious. It's needed for the very same reason as it ...
Raffzahn's user avatar
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12 votes

Is there a technical reason why Datel Action Replay on PC required a card?

Jean-François Fabre’s answer mentions a number of advantages of a hardware solution over software, but I think it’s worth expanding on the main reason (IMO): hardware can reliably generate an ...
Stephen Kitt's user avatar
24 votes
Accepted

Is there a technical reason why Datel Action Replay on PC required a card?

Disclaimer: I always managed with Turbo Debug on games, which relied exclusively on software, and only used the amiga version of Action Replay. That said, the hardware Action Replay on PC gives it ...
Jean-François Fabre's user avatar
14 votes
Accepted

Is there any DOS game before Quake era (1996) that makes heavy use of the FPU?

MobyGames lists a number of games with support for a FPU¹. The earliest shown there are Falcon 3.0 and Scorched Earth (1991), and like most of the other games in the list, the FPU is optional: Note ...
Stephen Kitt's user avatar

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