David Shadoff
@dshadoff.bsky.social
Mostly PC Engine and PC-FX reverse-engineering and development. I also contribute to MiSTer FPGA cores and a Mednafen fork. (hobby).
Reposted by David Shadoff
I was switching between Famicom & PCE/TG16 games and was annoyed at how PCE screens were shifted to the left compared to Fami. So I did some measurements: the Fami's active pixels start ~7.6us after the end of HSync while the PCE's can be 7.0us (early) or 8.47us (late), but never the same as Fami :/
November 10, 2025 at 11:37 PM
I was switching between Famicom & PCE/TG16 games and was annoyed at how PCE screens were shifted to the left compared to Fami. So I did some measurements: the Fami's active pixels start ~7.6us after the end of HSync while the PCE's can be 7.0us (early) or 8.47us (late), but never the same as Fami :/
I agree with pretty much every point that he made in this article.
www.theregister.com/2025/11/07/d...
www.theregister.com/2025/11/07/d...
Former Microsoft engineer explains why Windows 'sucks' now
: Respecting users choices and offering a hardcore mode among key suggestions.
www.theregister.com
November 7, 2025 at 7:41 PM
I agree with pretty much every point that he made in this article.
www.theregister.com/2025/11/07/d...
www.theregister.com/2025/11/07/d...
Reposted by David Shadoff
This time on PC-88 Paradise, it's LAST ARMAGEDDON! Can I make it through this infamously player-unfriendly game? And how does the original version compare to the ports for the PC Engine, Famicom, and other systems? Find out in the video!
youtu.be/L03amxANZqs
youtu.be/L03amxANZqs
November 5, 2025 at 5:08 PM
This time on PC-88 Paradise, it's LAST ARMAGEDDON! Can I make it through this infamously player-unfriendly game? And how does the original version compare to the ports for the PC Engine, Famicom, and other systems? Find out in the video!
youtu.be/L03amxANZqs
youtu.be/L03amxANZqs
I just realized that Queen's "Bohemian Rhapsody" was released 50 years ago (plus a few days).
Time flies...
Time flies...
November 5, 2025 at 4:27 PM
I just realized that Queen's "Bohemian Rhapsody" was released 50 years ago (plus a few days).
Time flies...
Time flies...
It's apple season, so I made an apple galette.
Much faster/easier to make than a proper apple pie.
Much faster/easier to make than a proper apple pie.
November 3, 2025 at 1:25 AM
It's apple season, so I made an apple galette.
Much faster/easier to make than a proper apple pie.
Much faster/easier to make than a proper apple pie.
Reposted by David Shadoff
I've spent the last two years developing firmware and software for a WS/WSC/PCv2 flash/development cartridge. Now, it has finally been announced and will be sold by 49bitcat in Germany. Sales start November 24th!
Learn more here: 49bitcat.com/news/2025-10...
Learn more here: 49bitcat.com/news/2025-10...
October 31, 2025 at 6:23 AM
I've spent the last two years developing firmware and software for a WS/WSC/PCv2 flash/development cartridge. Now, it has finally been announced and will be sold by 49bitcat in Germany. Sales start November 24th!
Learn more here: 49bitcat.com/news/2025-10...
Learn more here: 49bitcat.com/news/2025-10...
Quick update on a few interesting crowdfunded electronics tools:
TermDriver 2 - received yesterday, about a week EARLY!
(Now waiting for firmware repository to be published.)
www.crowdsupply.com/excamera/ter...
TermDriver 2 - received yesterday, about a week EARLY!
(Now waiting for firmware repository to be published.)
www.crowdsupply.com/excamera/ter...
TermDriver 2
A better USB-to-serial adapter with a built-in screen
www.crowdsupply.com
October 30, 2025 at 2:33 AM
Quick update on a few interesting crowdfunded electronics tools:
TermDriver 2 - received yesterday, about a week EARLY!
(Now waiting for firmware repository to be published.)
www.crowdsupply.com/excamera/ter...
TermDriver 2 - received yesterday, about a week EARLY!
(Now waiting for firmware repository to be published.)
www.crowdsupply.com/excamera/ter...
Reposted by David Shadoff
New episode up!
Ben and Matt talk about Pachio-kun FX, a competitive pachinko title featuring fantastical anime girls using their skills and magical powers to gamble. We cover how Pachinko works, our experiences with the game, and how it uses the PC-FX's capabilities.
youtu.be/jTOZ2zoPO5o
Ben and Matt talk about Pachio-kun FX, a competitive pachinko title featuring fantastical anime girls using their skills and magical powers to gamble. We cover how Pachinko works, our experiences with the game, and how it uses the PC-FX's capabilities.
youtu.be/jTOZ2zoPO5o
Pachio-kun FX (PC-FX Pachinko) Game Discussion – PC-FX Fan Club Podcast
YouTube video by PC-FX Fan Club
youtu.be
October 28, 2025 at 9:08 PM
New episode up!
Ben and Matt talk about Pachio-kun FX, a competitive pachinko title featuring fantastical anime girls using their skills and magical powers to gamble. We cover how Pachinko works, our experiences with the game, and how it uses the PC-FX's capabilities.
youtu.be/jTOZ2zoPO5o
Ben and Matt talk about Pachio-kun FX, a competitive pachinko title featuring fantastical anime girls using their skills and magical powers to gamble. We cover how Pachinko works, our experiences with the game, and how it uses the PC-FX's capabilities.
youtu.be/jTOZ2zoPO5o
Reposted by David Shadoff
Who Did What At Irem: A (Semi-)Comprehensive Thread
Today, we're going to be doing a deepdive on one of the premier arcade giants of the 1980's. We're all familiar with enduring classics such as R-Type and In The Hunt, but who were the talented men & women that created them?
Today, we're going to be doing a deepdive on one of the premier arcade giants of the 1980's. We're all familiar with enduring classics such as R-Type and In The Hunt, but who were the talented men & women that created them?
November 23, 2024 at 11:01 AM
Who Did What At Irem: A (Semi-)Comprehensive Thread
Today, we're going to be doing a deepdive on one of the premier arcade giants of the 1980's. We're all familiar with enduring classics such as R-Type and In The Hunt, but who were the talented men & women that created them?
Today, we're going to be doing a deepdive on one of the premier arcade giants of the 1980's. We're all familiar with enduring classics such as R-Type and In The Hunt, but who were the talented men & women that created them?
Reposted by David Shadoff
Japan-Only TAITO Quiz Games Just Hit the #MiSTerFPGA F2 Core! Thanks @wickerwaka.com
Read more here: metalgamesolid.com/fpga/mister-...
Read more here: metalgamesolid.com/fpga/mister-...
October 28, 2025 at 10:55 AM
Japan-Only TAITO Quiz Games Just Hit the #MiSTerFPGA F2 Core! Thanks @wickerwaka.com
Read more here: metalgamesolid.com/fpga/mister-...
Read more here: metalgamesolid.com/fpga/mister-...
Started getting a lot of spam chat requests here, so I had to change settings to "only users I follow".
Just so you know.
It would be nice if BlueSky had an intermediate choice - for example, people who follow me for a certain period of time first (or something like that).
Just so you know.
It would be nice if BlueSky had an intermediate choice - for example, people who follow me for a certain period of time first (or something like that).
October 25, 2025 at 1:51 AM
Started getting a lot of spam chat requests here, so I had to change settings to "only users I follow".
Just so you know.
It would be nice if BlueSky had an intermediate choice - for example, people who follow me for a certain period of time first (or something like that).
Just so you know.
It would be nice if BlueSky had an intermediate choice - for example, people who follow me for a certain period of time first (or something like that).
Apparently, I'm not finished with the XE-1AP/CyberStick code on MiSTer.
Christoph Smaul showed me that there is a protocol difference between "computer" and "console" settings on the XE-1AP, and a converter is needed to use the CyberStick on a MegaDrive.
github.com/herr-g/cyber...
Christoph Smaul showed me that there is a protocol difference between "computer" and "console" settings on the XE-1AP, and a converter is needed to use the CyberStick on a MegaDrive.
github.com/herr-g/cyber...
GitHub - herr-g/cyber-to-md-converter
Contribute to herr-g/cyber-to-md-converter development by creating an account on GitHub.
github.com
October 23, 2025 at 11:19 PM
Apparently, I'm not finished with the XE-1AP/CyberStick code on MiSTer.
Christoph Smaul showed me that there is a protocol difference between "computer" and "console" settings on the XE-1AP, and a converter is needed to use the CyberStick on a MegaDrive.
github.com/herr-g/cyber...
Christoph Smaul showed me that there is a protocol difference between "computer" and "console" settings on the XE-1AP, and a converter is needed to use the CyberStick on a MegaDrive.
github.com/herr-g/cyber...
Reposted by David Shadoff
The @hackadayofficial.bsky.social Supercon Badge this year will feature a KeebDeck derivative! ⌨️
hackaday.com/2025/10/23/a...
hackaday.com/2025/10/23/a...
Announcing The 2025 Hackaday Superconference Communicator Badge
It’s the moment you hard-core hardware nerds have been waiting for: the reveal of the 2025 Hackaday Supercon Communicator Badge. And this year, we’ve outdone ourselves, but that’s thanks to help fr…
hackaday.com
October 23, 2025 at 8:51 PM
The @hackadayofficial.bsky.social Supercon Badge this year will feature a KeebDeck derivative! ⌨️
hackaday.com/2025/10/23/a...
hackaday.com/2025/10/23/a...
Reposted by David Shadoff
New interview! A followup to a recent post where I unearthed a 2008 interview with turboxray, who was doing cool things with the PC Engine.
Well near enough 18 years later he's doing more cool stuff! I asked about Ghouls n Ghosts for the SuperGrafx, Street Fighter, Bonk and Dracula X!
Well near enough 18 years later he's doing more cool stuff! I asked about Ghouls n Ghosts for the SuperGrafx, Street Fighter, Bonk and Dracula X!
Updating Old Games
Talking about game 16 bit game hacking: updating the PC Engine SuperGrafx versions of Street Fighter 2, Ghouls n Ghosts, and drawing graphics the Neo Geo way.
nfgworld.com
October 22, 2025 at 11:56 AM
New interview! A followup to a recent post where I unearthed a 2008 interview with turboxray, who was doing cool things with the PC Engine.
Well near enough 18 years later he's doing more cool stuff! I asked about Ghouls n Ghosts for the SuperGrafx, Street Fighter, Bonk and Dracula X!
Well near enough 18 years later he's doing more cool stuff! I asked about Ghouls n Ghosts for the SuperGrafx, Street Fighter, Bonk and Dracula X!
This CrowdSupply item - the ESP32JTAG - just went live, and it has a lot more functionality than I thought it would when I first heard about it.
Impressive.
Also, 40% of the way to its target, and it only started a few hours ago.
www.crowdsupply.com/ez32/esp32jtag
Impressive.
Also, 40% of the way to its target, and it only started a few hours ago.
www.crowdsupply.com/ez32/esp32jtag
ESP32JTAG
A multifunction, wireless JTAG tool powered by an ESP32 and an FPGA
www.crowdsupply.com
October 21, 2025 at 10:01 PM
This CrowdSupply item - the ESP32JTAG - just went live, and it has a lot more functionality than I thought it would when I first heard about it.
Impressive.
Also, 40% of the way to its target, and it only started a few hours ago.
www.crowdsupply.com/ez32/esp32jtag
Impressive.
Also, 40% of the way to its target, and it only started a few hours ago.
www.crowdsupply.com/ez32/esp32jtag
Reposted by David Shadoff
Here's another really old one from Falcom to wrap up my Haloween videos for this year: "Demon's Ring". Have you ever heard of this one? The video should explain pretty much everything you'd ever want to know!
youtu.be/C9xUR8PZhwA
#nihonfalcom #ys #trailsinthesky #retropcgames
youtu.be/C9xUR8PZhwA
#nihonfalcom #ys #trailsinthesky #retropcgames
October 20, 2025 at 1:54 PM
Here's another really old one from Falcom to wrap up my Haloween videos for this year: "Demon's Ring". Have you ever heard of this one? The video should explain pretty much everything you'd ever want to know!
youtu.be/C9xUR8PZhwA
#nihonfalcom #ys #trailsinthesky #retropcgames
youtu.be/C9xUR8PZhwA
#nihonfalcom #ys #trailsinthesky #retropcgames
Has anybody determined the pinout of the HuC6202 video priority chip used in the SuperGrafx ? I can't seem to find it online.
It seems like it could be re-implemented in silicon pretty easily, so that SuperGrafx machines wouldn't need to be sacrificed.
(Please don't send AI-generated stuff).
It seems like it could be re-implemented in silicon pretty easily, so that SuperGrafx machines wouldn't need to be sacrificed.
(Please don't send AI-generated stuff).
October 16, 2025 at 6:35 PM
Has anybody determined the pinout of the HuC6202 video priority chip used in the SuperGrafx ? I can't seem to find it online.
It seems like it could be re-implemented in silicon pretty easily, so that SuperGrafx machines wouldn't need to be sacrificed.
(Please don't send AI-generated stuff).
It seems like it could be re-implemented in silicon pretty easily, so that SuperGrafx machines wouldn't need to be sacrificed.
(Please don't send AI-generated stuff).
Reposted by David Shadoff
Why and how to replace electrolytic capacitors in vintage computers -- my VCF Midwest 2025 talk www.youtube.com/watch?v=iMRC...
Replacing Ticking Time Bombs: Electrolytic Capacitors | VCFMW 20 (2025)
YouTube video by VCF Midwest
www.youtube.com
October 14, 2025 at 10:32 PM
Why and how to replace electrolytic capacitors in vintage computers -- my VCF Midwest 2025 talk www.youtube.com/watch?v=iMRC...
Reposted by David Shadoff
forums.nesdev.org/viewtopic.ph...
wrote up a bit of info on a less common US revision of Micro Machines for the NES, featuring a pretty nasty bug, discovered just a little too late and then worked around by using a PLD to patch a single *bit*. this is what day one patches looked like in 1991!
wrote up a bit of info on a less common US revision of Micro Machines for the NES, featuring a pretty nasty bug, discovered just a little too late and then worked around by using a PLD to patch a single *bit*. this is what day one patches looked like in 1991!
October 13, 2025 at 10:42 PM
forums.nesdev.org/viewtopic.ph...
wrote up a bit of info on a less common US revision of Micro Machines for the NES, featuring a pretty nasty bug, discovered just a little too late and then worked around by using a PLD to patch a single *bit*. this is what day one patches looked like in 1991!
wrote up a bit of info on a less common US revision of Micro Machines for the NES, featuring a pretty nasty bug, discovered just a little too late and then worked around by using a PLD to patch a single *bit*. this is what day one patches looked like in 1991!
That's an interesting behaviour and effect.
It matches the "early 90s" animation style.
It matches the "early 90s" animation style.
The latest version of the Taito F2 core fixes the shadows in PuLiRuLa so they "shimmer" like you see in the video. The shadows are just the character sprites drawn with a black color palette and scaled down vertically. So what makes them shimmer?
October 12, 2025 at 3:46 PM
That's an interesting behaviour and effect.
It matches the "early 90s" animation style.
It matches the "early 90s" animation style.
Interesting video about consolidation of the restaurant supply business in North America. And why it has become hard to find good food made fresh from basic ingredients (or even unique food).
www.youtube.com/watch?v=rXXQ...
www.youtube.com/watch?v=rXXQ...
I Tracked Down The Company Ruining Restaurants
YouTube video by More Perfect Union
www.youtube.com
October 11, 2025 at 5:12 PM
Interesting video about consolidation of the restaurant supply business in North America. And why it has become hard to find good food made fresh from basic ingredients (or even unique food).
www.youtube.com/watch?v=rXXQ...
www.youtube.com/watch?v=rXXQ...
New source of weekly retro-game news !
Lots of news this week, so I appreciate the indexing of the stories (I probably wouldn't have time to watch in its entirety).
Lots of news this week, so I appreciate the indexing of the stories (I probably wouldn't have time to watch in its entirety).
Check out episode 1 of #Retro168 on our brand new YouTube Channel. A great round up of things that happened over the last 7 days
❤️ and RT appreciated 👍
Right here: youtu.be/tzmY_ZwySsc?...
❤️ and RT appreciated 👍
Right here: youtu.be/tzmY_ZwySsc?...
October 10, 2025 at 2:12 PM
New source of weekly retro-game news !
Lots of news this week, so I appreciate the indexing of the stories (I probably wouldn't have time to watch in its entirety).
Lots of news this week, so I appreciate the indexing of the stories (I probably wouldn't have time to watch in its entirety).
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...
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…
hackaday.com
October 9, 2025 at 2:17 AM
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...
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...
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...
www.youtube.com/@crowd_suppl...
Crowd Supply
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
October 8, 2025 at 3:40 PM
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...
www.youtube.com/@crowd_suppl...
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.
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.
October 7, 2025 at 5:40 PM
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.
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.