Castlevania III ※ Cracking VG Passwords S3e2

Channel:

Bisqwit

Subscribers:

147,000

Published on July 24, 2025 11:21:42 AM ● Video Link: https://www.youtube.com/watch?v=vfvaZK1ZL-U

Game:

Castlevania III: Dracula's Curse (1989)

Duration: 0:00

5,406 views

330

In the advent of 1990 I played NES games a lot. Cracking the password systems in those games captivated me. In this series we will study some of these systems.\n\nBecome a member: \n\nMy links:\nTwitter: https://twitter.com/RealBisqwit\nLiberapay: https://liberapay.com/Bisqwit\nSteady: https://steadyhq.com/en/bisqwit\nPatreon: https://patreon.com/Bisqwit (Other options at https://bisqwit.iki.fi/donate.html)\nTwitch: https://twitch.tv/RealBisqwit\nHomepage: https://iki.fi/bisqwit/

0:00 Video introduction
0:16 Game introduction
1:22 Password entry system
2:10 Numeric content
3:16 Data content in password
4:08 The “key” symbol and location of data
6:13 The name hash (asm code)
8:22 The 8-bit checksum (asm code)
10:34 The stages
11:58 Decoding an example password
13:33 All the passwords
13:58 Example code: Password codec
14:18 Teaser of next episode
14:26 End greetings

Note: The video has an error at 13:38: There are 4¹⁶ = 4294967296 different grid contents, not 4³². Sorry! (Thanks Warp)