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Analog Audio Circuitry

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Analog circuit design remains an enigmatic discipline that has, to date, evaded the expansive reach of ChatGPT and similar technologies. It's therefore not ent...

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1942/1943 and Work on Audio Filters

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Arcade video games have three types of sound sources:

  1. Square/triangular waveforms at different frequencies: PSG sound (1942, Exed Exes, Kicker, Tra...

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Vendetta (Crime Fighters 2)

Last minute release today, please excuse us for the short  post: we've managed to get Vendetta working in the JTSIMSON core. The  hardware is extremely similar between the two systems, al...

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Parodius da!

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We worked on Parodius da! schematics last year. It turned out to be very similar to The Simpsons board, with some differences:

  • Di...

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Body Slam / Quartet / JTALIENS release

Thanks for the feedback on last week's service release.  Some regression errors were quickly identified by the community and  appropiate patches have been applied:

Service Release

Thanks to everyone who has taken the time to report an issue in GitHub. All files have been updated in 2024-01-26 10:03:54 +0000 UTC View Post

Global Core Review and Issue Solving

As most of you know, issues related to JTCORES are collected here.  This includes road map items, reverse engin...

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NeoGeo Pocket Beta Core

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Just in time for reyes,  the first beta core...

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NGP Development Update / 1942/Higemaru for Pocket

2023-12-29 NGP Development Update / 1942/Higemaru for Pocket

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NeoGeo Pocket Update

The NeoGeo Pocket core is the worst time to market f...

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MCU Time! Bubble Bobble, Tokio, Renegade...

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When I made the JTBUBL (Bubble Bobble, Tokio) core, I had  to limit it to certain game versions that used a MCU (Micro Controller  Unit) for which I ...

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Thunder Cross, Space Odyssey and Keyboard Support on the Pocket

Thunder Cross

JTALIENS core gets support for one more game: Thunder  Cross. This is a spectacular shooter with a good depth feeling thanks to  the use of parallax s...

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2023-11-17 Gang Busters and Public Releases

The JTALIENS core receives support for a new game added this week: Konami's Gang Busters.  This is a cute two-player game that reminds of Labyrinth Runner and  CAPCOM's A...

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Unplayable? Only credits?

Unplayable?

If you see the core credits rolling through the s...

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More Halloween Games

Today is Halloween so we are going to introduce five Halloween-ish games. All of them are playable on multiple FPGA platforms through JT cores. Try them out if you haven't already!

First up i...

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Halloween special: Splatter House

Important: jtbeta.zip changed, you need to update your copy.

I used to believe in Christmas miracles, now I have to believe in Halloween miracles too! Just five days ago, the...

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FPGA Platform Poll

As there has been a recent surge in Patreon subscribers (thank you!) let me ask you about which FPGA model you are using. Select as many as you own. Note that multiple choice may only work through ...

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Bubble Bobble (MiSTer update), CPS15 (Pocket/beta), CPS2 (Pocket/public)

Work on the Splatter House core continues. The game graphics are correct and the demo is stable and does not hang up. But, the MCU seems not to be working correctly and as a result...

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Dragon Ninja and news

Quick update:

  • Namco System 1 core is coming up soon. A couple of iconic games for it are Splatter House and PacMania. Currently the logic is hooked up but there is some problem at boot ...

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Out Run/Super Hang On Update & Development News

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Service Release

JTOUTRUN update: (Out Run support)

  • Fixed odd line in the middle of the r...

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Punk Shot (JTTMNT new beta)

The Pocket files have been corrected and are available at JTBIN  View Post

The Final Round

Important note for Pocket users

In order to facilitate the installation of beta cores, this will be added to JTBIN from now on. Third party updaters will take them from there...

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MIA (Green Beret 2) beta and fixes

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Following last week’s Teenage Mutant Ninja Turtles' beta, we add support to MIA (Green Beret 2) to th...

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Teenage Mutant Ninja Turtles (beta)

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As you probably all know, Furrtek made an awesome View Post

The Simpsons (beta), Black Tiger (Pocket, public release)

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MiSTer users: update your jtbeta.zip file using the attached one

The late 1980s and early 1990s marked a dynamic e...

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Development Update

The NeoGeo Pocket core is taking most of our time at the moment. All monochrome games boot up now and are somewhat playable (see details 2023-07-21 18:31:24 +0000 UTC View Post

System 16 Service Release

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I developed the SEGA System 16 compatible cores in 2021. It was a difficult project because under that unifying System 16 name there are ind...

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Crime Fighters (beta), HCastle (release) and hotfixes

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Another week with too many things to talk about. Let’s just focus on the highlights

  • New game in the JTALIENS core: Cri...

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System 16B (Pocket) and NeoGeo Pocket Update

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The NGP core saw good progress this week with the first successful boot on MiSTer FPGA. Almost all the monochrome NGP system is implemented ...

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Super Contra (JTALIENS) beta

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As promised, we will have a long run of Konami compatible cores either based on the Konami CPU or the TMNT video chipset. Super Contra joins...

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NeoGeo Pocket Update

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Today is the deadline I had set for the NeoGeo Pocket beta. I set this deadline to force myself to focus solely on this project. The core ha...

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