Analyzing the Castlevania III Password Algorithm #ReverseEngineering #Gaming
MeatFighter explains the mechanism Castlevania III: Dracula’s Curse uses to save and restore game state through the medium of passwords. The information discussed here applies to the North America and PAL versions released for the NES.
An unbridged table of all 3,294 valid name-and-password combos is located here.
Each column corresponds to a save point. Each row corresponds to a unique combination of name, partner, toggle mask index, and mode. Since the name is hashed to a 3‑bit value, there are only 8 name classes. As shown in the table below, the shortest names that cover all the classes are blank and B–H. These names appear at the left of each row.
Name
Hash
(blank)
4
A
4
B
5
C
6
D
7
E
0
F
1
G
2
H
3
HELP ME
1
AKAMA
2
OKUDA
3
URATA
4
FUJIMOTO
1
The table includes the special names because they modify the behavior of the game.
Eink, E-paper, Think Ink – Collin shares six segments pondering the unusual low-power display technology that somehow still seems a bit sci-fi – http://adafruit.com/thinkink
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !
No Comments
No comments yet.
Leave a comment
Adafruit has a "be excellent to each other" comment policy. Help us keep the community here positive and helpful. Stick to the topic, be respectful of makers of all ages and skill levels. Be kind, and don't spam - Thank you!
