David Shadoff Profile
David Shadoff

@Shadoff_d

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389
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Mostly PC Engine and PC-FX reverse-engineering and development. I also contribute to MiSTer FPGA cores and a Mednafen fork. (hobby)

Canada
Joined March 2011
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@Shadoff_d
David Shadoff
20 hours
RT @FG_Software: I shall now reveal the gimmick of this boss now that it's full implemented: Smooth, real-time scaling on PC Engine hardwar….
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@Shadoff_d
David Shadoff
2 days
RT @shinyaman2: 1994年8月12日発売「ぽっぷるメイル 」.ファルコムならではのゲームで遊びだすと楽しくてついつい進めてしまう。.(効果音は過去のファルコムゲーそのもの).キャラクターはよくしゃべるし、その内容も笑えるものばかりなので楽しめると思う。.#PCエ….
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@grok
Grok
3 days
Generate videos in just a few seconds. Try Grok Imagine, free for a limited time.
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@Shadoff_d
David Shadoff
2 days
RT @DerekPascarella: (1/8) It's time for another English translation patch release for the FM Towns!. This time, it's Queen Soft's "Gambler….
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@Shadoff_d
David Shadoff
2 days
RT @RgRDev: Pulled out my ancient Arduino UNO R3 (this one’s been with me for, what, 10 years?!) last Sunday,.and finally built something I….
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@Shadoff_d
David Shadoff
3 days
I created a repository with details about my PC-FX subcode analysis, including instructions on how I went about it and the Python program I wrote to scan the subcode. Here is a link to the repository - maybe it's useful for other systems' games too.
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github.com
A Study of Subcode Q sub-indexes used on PC-FX games - dshadoff/PCFX_SubcodeQ_Study
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@Shadoff_d
David Shadoff
3 days
RT @basemntbrothers: Here's a PC-98 game I've been meaning to play. Before you play the new Mado Monogatari game, here's a look back at the….
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@Shadoff_d
David Shadoff
3 days
My speculation on why indexes exist inside of data tracks - I don't believe that they are explicilty used, but may have been added as part of the mastering process. That is, several independently-coded sections are appended, and may have been assigned indexes at that point.
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@Shadoff_d
David Shadoff
3 days
I was using a program called "CD Manipulator" to extract the subcode, but I did get a small variance on a CD+G disc, as compared to a prior rip with other software (not as many pregaps), so there is probably still some room for learning more.
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@Shadoff_d
David Shadoff
3 days
Only one game (Pachio-kun) has an additional index (besides pre-gap and index 1) in AUDIO - Pachio-kun. And that is close enough to the end of the track that I don't think it's used.
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@Shadoff_d
David Shadoff
3 days
Looking at CD subcode use on PC-FX games, and I found a few interesting things:.1) Quite a few timing marks have errors (100 or more per disc), so the subcode-Q CRC is actually quite important. 2) Around 50% of PC-FX games use subindexes inside of the data tracks (!).
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@Shadoff_d
David Shadoff
5 days
RT @GallandRegis: Bientôt la fin du développement de l'émulateur de CD-rom2. Confirmation que le port USB fonctionne bien et que les jeux p….
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@Shadoff_d
David Shadoff
7 days
It's not their first overhaul, but I think it has much more (negative) impact than others in the past. It is also interesting to note that in the past they have almost always done these overhauls at the very end of an economic cycle/bubble, and often have to walk them back.
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@Shadoff_d
David Shadoff
7 days
Air Canada announced an overhaul of their frequent flier plan today (effective 2026) which makes it about 3 times more difficult to earn points and 2 to 4 times more difficult to earn status, if flying long-haul between North America and Asia.
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@Shadoff_d
David Shadoff
8 days
Reading the latest update from Termdriver, I was thinking "if displays are cheap, why don't we start putting them on everything ?".So maybe I'll think about making a PC-FX backup cart with ePaper to display what games are on it and how much space remains.
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crowdsupply.com
A better USB-to-serial adapter with a built-in screen
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@Shadoff_d
David Shadoff
8 days
I won't be attending this year, but I thought I'd post about Hackaday Supercon's discount advanced ticket sales here. I had fun attending last year, and met some really interesting people.
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hackaday.com
The wait is over — once this post hits the front page, ticket sales for the 2025 Hackaday Supercon will officially be live! As is tradition, we’ve reserved 100 tickets priced at $148 (p…
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@Shadoff_d
David Shadoff
9 days
RT @yuzokoshiro: If you discovered Earthion through YouTube or elsewhere and enjoyed what you saw, we’d be truly grateful if you consider p….
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@Shadoff_d
David Shadoff
10 days
RT @lunokaretro: As a reminder, here is my last retro project for 8/16 bit consoles 😄, you can download it for free on my itchio page (in b….
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@Shadoff_d
David Shadoff
10 days
RT @yoshinokentarou: 個人開発が非常に少ない「PCエンジン」ではあるが、今から約9年前にタイトーの名作「バブルボブル」かこっそりと勝手移植され、残すはBGMのみというところで一部ユーザーにのみベータテスターという形で配布された.��が以降の続報はない.http….
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@Shadoff_d
David Shadoff
11 days
RT @SarumaruVG: Interview with @LucidPotatoPub and over on @PixelCNinja is live now on his channel. Stop by, say hi! #retrogaming #indiedev….
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