In December of 2019 after many years of runs, the speedrunning record for Castlevania on the NES was close to 11 minutes 24 seconds. In Summer of 2020, speedrunners took a new discovery for the implementation of scrolling for the game and used it to skip several screens at a time in various places throughout […]
If you manage to land a hit on an enemy in Castlevania on the same frame that Simon gets hit, the whip does considerably more damage than normal. But WHY? Let’s dive into the logic flow of the game to figure out the perfect storm of values in RAM that allow this to occur. Timing […]
RetroRGB gets down to business when it comes to measuring lag. That new wireless controller or fancy display might seem cool on paper, but what about performance? Modern devices and emulation of retro games can add to lag, but lag begins with the game code itself. Let’s hop into the execution time for standing attack […]
It is the summer of TMNT, and here is another Behind the Code video for the first entry on the NES. This video focuses on the application of gravity with respect to frame rate for jumping in the game and also breaks down the frame timing for making the three types of jumps – short, […]
I thought it would be fun to dig my nails into the code of Teenage Mutant Ninja Turtles for NES – a popular game that seems rather rushed. No surprises – the code is sloppy in more ways than one. Swimming, water current, that infamous Seaweed Screen of Doom, and some weird collision problems on […]
A viewer named Mike Schiraldi contacted me with a discovery he found in the code for Super Mario Bros. Apparently, there is a scrolling bug in the setup for the underground Warp Zones that involves a hidden enemy object! This video dives into how Super Mario Bros. levels are built, how scroll stops work, what […]
