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David Shadoff

@dshadoff.bsky.social

930 followers 61 following 630 posts

Mostly PC Engine and PC-FX reverse-engineering and development. I also contribute to MiSTer FPGA cores and a Mednafen fork. (hobby).

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David Shadoff @dshadoff.bsky.social · 1d

Here's an article I need to bookmark for later.
If I want to do some ASIC design, I'll eventually want to do mixed-signal stuff, so I'll want to know how the analog is dealt with.

hackaday.com/2025/10/08/t...

The Entire Process Of Building An Open Source Analog ASIC

Our hacker [Pat Deegan] of Psychogenic Technologies shows us the entire process of designing an analog ASIC. An ASIC is of course an Application-Specific Integrated Circuit, which is basically just…

David Shadoff @dshadoff.bsky.social · 1d

I noticed that @crowdsupply.bsky.social has been busy posting the talks from Teardown 2025 onto their Youtube channel. I don't think that all of the talks are up yet, so keep checking on them !

www.youtube.com/@crowd_suppl...

Crowd Supply is a curated crowdfunding platform for exceptionally transparent and creative manufactured goods. We help you launch with the funding and support you need to deliver your new, thoughtfull...

www.youtube.com

David Shadoff @dshadoff.bsky.social · 2d

I'm not sure how I feel about Qualcomm's purchase of Arduino - I just don't see what they have in common.

Since I've moved on to other microcontrollers, it doesn't really affect me though.

But maybe Qualcomm is planning a line of microcontollers ? More competition is probably a good thing.

David Shadoff @dshadoff.bsky.social · 2d

I'll have to think about attending this.
Hopefully it will be interesting.

OSHWA @oshwassociation.bsky.social · 2d

The 2026 Open Hardware Summit is coming.... to Berlin, Germany! On May 22nd and 23rd!! Still so much news to come here but we wanted to be sure you knew! For now you can enjoy the beautiful logo designed by @[email protected] and check out the site at 2026.oshwa.org

(livestream heard it first🤭)

Reposted by David Shadoff

BadComputer @badcomputer.bsky.social · 3d

To celebrate the 40th Anniversary of the SEGA Mark III console in Japan, Astro Climber will be released and available for free on 20th October. #homebrew #mastersystem

David Shadoff @dshadoff.bsky.social · 3d

I've been having this same thought a lot lately.

Jeff Geerling @jeffgeerling.com · 3d

I wonder if Microsoft secretly wants everyone to switch to Linux. There are certainly fewer reasons to stick to Windows every day: www.theverge.com/news/793579/...

Microsoft is plugging more holes that let you use Windows 11 without an online account

Microsoft is disabling the best local account workarounds

www.theverge.com

David Shadoff @dshadoff.bsky.social · 3d

During the dot-com bubble, dot-com companies felt more and more under pressure to actually commit the invested money to specific purposes, and many of those purposes were building out infrastructure.
The stock market from 1999 to 2002 was interesting. Even Amazon, a victor, lost 90% in this period.

David Shadoff @dshadoff.bsky.social · 4d

And finally, some of these items are small enough to exist on the same chip as some of the others. One design could fail (and be a source of learning), if the other design works.

David Shadoff @dshadoff.bsky.social · 4d

4. Miscellaneous:
- ADC for analog controller digitization
- MIDI / FM Synth generators

David Shadoff @dshadoff.bsky.social · 4d

3. While I would be afraid of mixed-mode design initially:
- video drivers including PPU stable replacements
- a lookup-table driven RGB driver for PC Engine/TurboGrafx (since original RGB doesn't currently have the same analog output as the modulated signal).

David Shadoff @dshadoff.bsky.social · 4d

2. Specialty chips which were based on mask-programmable PALs of the 80s and early 90s.
Includes:
- multi-taps
- RAM/ROM address decoders
- special-function chips from cartridges

David Shadoff @dshadoff.bsky.social · 4d

1. Anything related to 80s/90s controllers (except USB):
Include:
- Protocol converters, specialty signalling (such as XE-1AP or other unique controllers).
- Special-function devices (like save units) which use the controller signals for communications.

David Shadoff @dshadoff.bsky.social · 4d

I really want
@mith.ro 's wafer.space silicon manufacturing shuttles to succeed and continue to be available, so I was trying to brainstorm some retro-computer/console chips which may be viable.
Most can be done on FPGA today, but custom silicon could make assembly cheaper (reducing FPGA support).

wafer.space - Budget silicon manufacturing.

Create integrated circuits without breaking the bank!

David Shadoff @dshadoff.bsky.social · 4d

My iPad Pro 10.5" from 2017 has been a bit sluggish lately, so I thought I'd look at replacing it with a current-generation basic iPad.
Apple stuff never goes on sale in Canada... but what ? Amazon and Best Buy both have the same >10% off sale.
I wonder what's driving this.

David Shadoff @dshadoff.bsky.social · 5d

Well, I guess that aged well.

David Shadoff @dshadoff.bsky.social · 5d

先日この動画を見て、とても印象に残りました。日本人は日本社会が均質的だと世界に伝えています、この動画はそれとは違うことを示しています。
日本にいても安全だと感じることは変わりませんが、人々は実際何を考えているのか気になります。
www.youtube.com/watch?v=mGjF...

Chaos Erupts Between Japanese Patriots and Antifa at Anti-Immigration Rally

YouTube video by Interviewing Japan

www.youtube.com

David Shadoff @dshadoff.bsky.social · 5d

I somehow feel that it's pretty rare in Japan to have this kind of "deadpan delivery" of comedy, so I wonder how many people would try to take it seriously (as a silly idea), and how many would immediately realize it was a joke from the start.

David Shadoff @dshadoff.bsky.social · 5d

Oh, I found a Youtube playlist of their past keyboards...

www.youtube.com/watch?v=EHqP...

Gboard 両面バージョン

YouTube video by Google Japan

www.youtube.com

David Shadoff @dshadoff.bsky.social · 5d

Google Japan's tradition of making videos about new keyboard creations continues. Although most of them in the past have been released on April 1st, for reasons which will become clear...

www.youtube.com/watch?v=BgdW...

Gboard ダイヤルバージョン / Gboard Dial Version

YouTube video by Google Japan

www.youtube.com

David Shadoff @dshadoff.bsky.social · 8d

I wonder if any company would have ever bought Excel if there was a 57% chance that the worksheet totals were correct.

Reposted by David Shadoff

Romhack.ing @romhack.ing · 9d

News Added: Dead of the Brain 2 - English Translation Released!

Dead of the Brain 2 - English Translation Released! - News

Fairytale's Dead of the Brain 2 for the PC-98 received a full English translation. This unique adventure game is a sequel to the first one. Now in English for the first time!

David Shadoff @dshadoff.bsky.social · 9d

I thought nothing these days was sold like that - without at least a 10GB day-zero mandatory download to update before it can be played.
This is why I only play old games.

David Shadoff @dshadoff.bsky.social · 12d

Nice idea !

David Shadoff @dshadoff.bsky.social · 12d

Sorry, didn't properly tag @zaxour.bsky.social above.

David Shadoff @dshadoff.bsky.social · 12d

The PC Engine's true colour palette isn't linear RGB; the palette goes through a transformation when it gets modulated. And while its composite output is good, S-Video is better. Here's a video that shows off @zaxour 's TurboNanza modification:

www.youtube.com/watch?v=05x7...

PC Engine & Enhanced S-Video - TurboNanza Mod on the RetroTINK 4K! :: RGB331 / MY LIFE IN GAMING

YouTube video by My Life in Gaming

www.youtube.com