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David Youd

@c64cryptoboy.bsky.social
264 followers 178 following 213 posts

Otrovert, 8-bit preservationist, and armchair ludomusicologist www.youtube.com/@DavidYoud

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David Youd @c64cryptoboy.bsky.social · 15m
I will be talking about #C64 #agentic #reversing using #retrodebugger at #CRX2026 in November www.crxevent.com There's nothing special about this harness, but this one is mine:
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David Youd @c64cryptoboy.bsky.social · 27/09/2026
There's now software to make C64 Transwarp 50x fast loads on native C64 hardware: www.obliterator918.com/transwarp-wr...
obliterator918.com
Transwarp Writer (Native C64 encoder) | Obliterator918's Commodore 64 Project Haven
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David Youd @c64cryptoboy.bsky.social · 26/09/2026
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David Youd @c64cryptoboy.bsky.social · 17/09/2026
The latest #C64 stuff from CBMstuff (Jim Drew): www.youtube.com/watch?v=ENK6...
youtube.com
We're Getting 20MHz Commodore 64 CPUs?! // Jim Drew VCF Midwest Interview
YouTube video by Run Stop Restored
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David Youd @c64cryptoboy.bsky.social · 13/09/2026
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David Youd @c64cryptoboy.bsky.social · 13/09/2026
@kimchikawaii.bsky.social created some custom artwork for my workplace again this past week. Highly recommended for feel-good #kawaii art commissions. <3
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David Youd @c64cryptoboy.bsky.social · 11/09/2026
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David Youd @c64cryptoboy.bsky.social · 25/08/2026
Michael Cranford (#bardstale) is back #c64: www.youtube.com/watch?v=48JL...
youtube.com
Shadow Snare — Commodore 64 Gameplay Demonstration
YouTube video by Shadow Snare
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David Youd @c64cryptoboy.bsky.social · 25/08/2026
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David Youd @c64cryptoboy.bsky.social · 20/08/2026
Autocomplete your ideas on the piano: simedw.com/2026/08/20/m...
simedw.com
Training a 125M-parameter Model to Autocomplete Piano
Can a small transformer autocomplete MIDI performances in real time?
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David Youd @c64cryptoboy.bsky.social · 20/08/2026
Mail call: Could you have earned a Computers merit badge in 1984?
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Reposted by David Youd
Lava Level 🌋Game Publishing🌋 @lavalevel.bsky.social · 15/08/2026
I've maintained my handcrafted RPG on Mobile (iOS/Android) for 13 years (No small accomplishment) & soon, very very soon, to release the sequel! Share & join this account to follow along! I'm almost at 100 followers!! Only 12 away!! We party at One Hundy!! #DevParty #NoAI #RPG #IndeDev #QuestLord
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David Youd @c64cryptoboy.bsky.social · 07/08/2026
Mail call: new #RPG for the #commodorePET
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David Youd @c64cryptoboy.bsky.social · 28/07/2026
Got my hands on a rare C64 text adventure (and fixed some bugs): www.youtube.com/watch?v=OiUZ...
youtube.com
Quill Adventure Hacking: Secrets of the Pyramid of Light Walkthrough & Patch Tutorial
YouTube video by David Youd
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Reposted by David Youd
Eric Kinkead⚔️ @erickinkead.bsky.social · 12/07/2026
Little Red Dot appears every now and then, and for the life of me I can't figure out where or what is causing it. 🤬Well that's what I'm doing today... Chasing a single random pixel as if I am playing Warren Robinett's Adventure form 1980 🫩 #debug #debugging #gamedev #indiegamedev #indiedev
Frustration over the little red pixel in QuestLord 2FRUSTRATING LITTLE RED DOT!
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David Youd @c64cryptoboy.bsky.social · 21/06/2026
Enjoying Kauai :)
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David Youd @c64cryptoboy.bsky.social · 19/06/2026
Victimhood culture checklist: - polarizing "us-vs-them" mindset - poor conflict resolution - dependence on validation - resistance to feedback - reduced personal agency (and expecting others to perform agency on their behalf) - loss of credibility over time
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David Youd @c64cryptoboy.bsky.social · 15/06/2026
More retirement gaming goals:
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David Youd @c64cryptoboy.bsky.social · 04/06/2026
After a decade of development retro debugger has an official v1.0.0 release: csdb.dk/release/?id=...
csdb.dk
Retro Debugger V1.0.0
Other Platform Commodore 64 Tool: Retro Debugger V1.0.0 by Slajerek. Released on 4 June 2026
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David Youd @c64cryptoboy.bsky.social · 28/05/2026
I once saw an "it is what it is" t-shirt like this in an online store. I can't find it (which drives my OCD nuts), so I had AI mockup the image (although I have aphantasia, so I'm sure I got the overall style wrong). I'd love to buy it from the original artist if anyone could find it:
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David Youd @c64cryptoboy.bsky.social · 08/05/2026
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David Youd @c64cryptoboy.bsky.social · 21/04/2026
A cool project from @mrdoornbos.bsky.social imapenguin.com/2026/03/brea...
imapenguin.com
Breaking Enigma with Index of Coincidence on a Commodore 64
Breaking Enigma without known plaintext using statistical analysis on the Commodore 64.
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Reposted by David Youd
LaurieWired @lauriewired.bsky.social · 15/04/2026
How do you kill a Supercomputer?

 (Accidentally) using radioactive solder is a good way.

 IBM’s Blue Gene/L frequently crashed when running simulations at LLNL.

 Turned out that alpha particles from the lead solder in the board carrier were slamming the L1 cache with bit flips.
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David Youd @c64cryptoboy.bsky.social · 10/03/2026
My latest short: youtube.com/shorts/kXzG7...
youtube.com
What ears care about (it's not 256 Hz vs 261.63 Hz tuning)
YouTube video by David Youd
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Reposted by David Youd
BastichB64K @bastichb64k.bsky.social · 07/03/2026
Trying out this old keyboard peripheral on the #C64ultimate ... Little bit of 'Sonic' from my daughter ❤️
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David Youd @c64cryptoboy.bsky.social · 16/02/2026
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David Youd @c64cryptoboy.bsky.social · 12/02/2026
www.dexerto.com/gta/this-sto...
dexerto.com
This store is giving away GTA 6 for free – if you have a baby on release day - Dexerto
A Norwegian electronics company is promising to give away free copies of GTA 6 to parents who manage to give birth on the day that the game releases.
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David Youd @c64cryptoboy.bsky.social · 11/02/2026
Some AI 8-bit reverse engineering www.youtube.com/watch?v=sLWf...
youtube.com
Can AI Find the RNG in Bard’s Tale (C64)?
YouTube video by David Youd
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David Youd @c64cryptoboy.bsky.social · 03/02/2026
Got a new toy today. :) www.youtube.com/shorts/71jwc...
youtube.com
Enigma machine replica reveals disappointing secret
YouTube video by David Youd
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Reposted by David Youd
Martin Piper @martinpiper.bsky.social · 02/02/2026
I look at #Commodore64 demo "The Hat" by Fairlight and Genesis Project, specifically the part with the "14 balloon sprites" in a row and its "hires" scrolling border message. youtu.be/DyteWLEPKzE
youtu.be
C64 Demos peek - The Hat - Up, Up, and Away! - The balloons part
YouTube video by Martin Piper's mostly Commodore related memories
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David Youd @c64cryptoboy.bsky.social · 28/01/2026
Online #Zork I through III, but with an #LLM that replaces the normal input parser: infocom.tambo.co For instance, I just typed a prompt, and it translated it into two zork commands:
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David Youd @c64cryptoboy.bsky.social · 15/01/2026
Remember having to swap disks all the time on 8-bit RPGs? Well, this 21-year-old beat the modern (2020) game Factorio, after converting the game to an unfathomable disk-swapping hell of over 1,000 floppies: www.youtube.com/watch?v=cTPB...
youtube.com
I beat Factorio on 1,000 Floppy disks.
YouTube video by DocJade
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David Youd @c64cryptoboy.bsky.social · 10/01/2026
Of course, someone has already AI- #MCP -wrapped the new #C64Ultimate: github.com/Martijn-DevR...
github.com
GitHub - Martijn-DevRev/Ultimate64MCP: MCP server for the Ultimate 64 series mainboards and cartridges
MCP server for the Ultimate 64 series mainboards and cartridges - Martijn-DevRev/Ultimate64MCP
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David Youd @c64cryptoboy.bsky.social · 08/01/2026
A new 8K PET RPG: youtu.be/dzSJlNHcFME
youtu.be
Tower And Dragon 4.0 Trailer
YouTube video by Jason Cook
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David Youd @c64cryptoboy.bsky.social · 30/12/2025
An early #Commdore #PET RPG worth exploring: Dragon’s Eye ( #EPYX, 1981) youtu.be/jJfGN4Zeb7M
youtu.be
Dragon's Eye: Exploring an EPYX PET-Era RPG
YouTube video by David Youd
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David Youd @c64cryptoboy.bsky.social · 25/12/2025
Another Christmas Gift, a new version of VICE just dropped: vice-emu.sourceforge.io
vice-emu.sourceforge.io
VICE - the Versatile Commodore Emulator
Homepage of VICE - the Versatile Commodore Emulator
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David Youd @c64cryptoboy.bsky.social · 25/12/2025
New version of Retro Debugger just dropped today! #c64 #reversing github.com/slajerek/Ret...
github.com
Release Retro Debugger v0.64.74 · slajerek/RetroDebugger
Retro Debugger v0.64.74 Bug fixed: VIC Display bitmap/text Y pixel line was off 1 pixel (thanks to Brush/Elysium for reporting) Bug fixed: VIC Editor screen may become blank when view is not displa...
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David Youd @c64cryptoboy.bsky.social · 24/12/2025
Just arrived!
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David Youd @c64cryptoboy.bsky.social · 25/11/2025
David Given uses #ghidra to explore a new 6502-based toy (bypassing some "security" in the process): www.youtube.com/watch?v=jJ0X...
youtube.com
Reverse engineering a 'tony' 6502-based game console
YouTube video by Poking Technology
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David Youd @c64cryptoboy.bsky.social · 16/11/2025
If you'd like to msg Becky Heineman, now is the time
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David Youd @c64cryptoboy.bsky.social · 14/11/2025
It's #CRX2025 (Commodore Retro eXpo) weekend! It's free to virtually attend. I'm unable to join this year, but they've got a great lineup: #c64 www.crxevent.com/presenters.htm
crxevent.com
CRX EVENT
Website for Commodore Retro eXpo
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David Youd @c64cryptoboy.bsky.social · 13/11/2025
Michael Cranford's recent retrospective on developing The Bard's Tale (EA, 1985) www.youtube.com/watch?v=oHc5...
youtube.com
The History of “The Bard's Tale” by Michael Cranford - PRGE 2025 Portland Retro Gaming Expo
YouTube video by Portland Retro Gaming Expo
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Reposted by David Youd
SmilaIcon64 @smilaicon64.bsky.social · 28/10/2025
VALE OF THE LOST GODDESS. Right that's all the location bitmaps done and first pass on all the sprites done too. Stu wrote me a quick editor so i could link up all the rooms and add little descriptions of what you see. #c64
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David Youd @c64cryptoboy.bsky.social · 02/11/2025
Looked at that #BardsTale "IRKM DESMET DAEM" red herring again... Tried a running key cipher of two plain texts. C=(P1+P2)mod26 where "A"=0 to "Z"=25, so "Z"+"B"="A". Nothing plausible, but found fun nonsense: "IF GAZE PIECHART" + "A MEME A DEAR WANT" = "IRKM DESMET DAEM"
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David Youd @c64cryptoboy.bsky.social · 30/10/2025
Did a #Halloween 3D-print last night (hollow-face #illusion) www.youtube.com/shorts/uKcgI...
youtube.com
Hollow-face illusion: "turns" to face you (ABS 3D-print)
YouTube video by David Youd
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David Youd @c64cryptoboy.bsky.social · 26/10/2025
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David Youd @c64cryptoboy.bsky.social · 21/10/2025
www.scientificamerican.com/article/a-so...
scientificamerican.com
After 35 Years, a Solution to the CIA’s Kryptos Puzzle Has Been Found
After decades of speculation, two writers uncovered the answer to the Kryptos code’s final cipher
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David Youd @c64cryptoboy.bsky.social · 19/10/2025
Visited both C.S. Lewis and J.R.R. Tolkien (in Oxford) today
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David Youd @c64cryptoboy.bsky.social · 06/10/2025
Planning my pilgrimage to The Cave ( @visitthecave.bsky.social ) and the Arcade Archive ( @arcadearchive.co.uk ) on the 18th. :)
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David Youd @c64cryptoboy.bsky.social · 05/10/2025
My laptop died prematurely. Time to say goodbye to all these awesome stickers:
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