Retro Game Mechanics Explained

@rgmechex.com

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A YouTube channel about video games & programming. Channel: http://youtube.rgmechex.com Discord: http://discord.rgmechex.com Inquiries: http://inquiries.rgmechex.com

An assortment of 8-bit graphics tiles in a glitchy, but ordered diagonal pattern; "Early access on Patreon & YouTube Membership"
Toad using a potion in 4-3 of Super Mario Bros. 2 to create a door to subspace. He goes in, and finds that the area has been lit up so it isn't completely dark, which reveals that a lot of the background tiles are completely glitched.
Gameplay of Super Mario Bros. 2: Toad grabs a shyguy and throws it against a ladder, using it to clip through the floor and transition to the next room
@13:46 Yes, it was just an error! I disassembled the earliest version of code I have (this is actually Crazy Otto). It shows the correct patch for all four monsters: 2745: 2A 0A 4D ld hl,($4D0A) 2748: 3A 2C 4D ld a,($4D2C) 274B: CD 2F 3F call $3F2F 274E: CD 66 29 call $2966 277B: 2A 0C 4D ld hl,($4D0C) 277E: 3A 2D 4D ld a,($4D2D) 2781: CD 2F 3F call $3F2F 2784: CD 66 29 call $2966 27B8: 2A 0E 4D ld hl,($4D0E) 27BB: 3A 2E 4D ld a,($4D2E) 27BE: CD 2F 3F call $3F2F 27C1: CD 66 29 call $2966 2800: 2A 10 4D ld hl,($4D10) 2803: 3A 2F 4D ld a,($4D2F) 2806: CD 2F 3F call $3F2F 2809: CD 66 29 call $2966 Note they all have the same CALL $3F2F. So originally we had it working, all four monsters random, and then we screwed up INKY and SUE when we adjusted the patch code to align with 8-byte boundaries. Ok that is seriously depressing. A bug report for work we did in November 1981, 43 years ago.
A diagram of a circuit board with a few of the integrated circuit chips highlighted in red. "Early access on Patreon!"