Behind The Code

Why does the game run so fast in Level 6? Why is the frame rate so inconsistent on the NES?

Technical pursuit of the code that leads to a crash on the NES for Tetris.

Let's exploit the logic that crashes Tetris and write code by using the High Score Tables! All you need are a few extra controllers...

Why is there a flashing line above Shadow Man on the Stage Select screen? Why does the pause menu flicker? How do these NES graphics work, anyway? Let's find out!

Contra Force performance analysis, Mappers, porting the first Contra from NES to Famicom, Tiny Toon Adventures (yeah, seriously), and a small bit of Castlevania. It is all here.

Developer Micronics made some rather odd decisions about the controls for Ikari Warriors when porting it to the NES. Let's dive into arcade rotary controls, the NES d-pad, calculating velocities, and a terrible frame rate.

Can we run Ghosts 'N Goblins at 60 fps on the NES? Yes. How does the graphics engine work? What is wrong with these sprites? Why do they jitter? Let's go.