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Quartet 2 (World, S16A) [No Protection].mra 5.3 KB
July 9, 2021

Quartet 2 & News

I started this week trying to get System 16B games working, but I came across the i8051 MCU again. This MCU is used in many arcade games, and I have already faced it in the past. There are no good open-source cores for it. At least, not good from our retro point of view. I haven't been able to make it work reliably so far.

Ace contacted me about a sprite issue in the Contra core, and by reviewing the implementation, we found that a latch was missing. That was added, and the files in JTBIN have been updated for the MiSTer port (so far).

A lot of time went this week towards the NeoGeo Pocket CPU development. This task is finally getting some traction. Still, we need at least 2-3 months to finish the CPU.

I haven't been able to modify the System 16 RBF files substantially, but there is a game that works correctly with only a bad bug on the title screen that doesn't affect gameplay. That's the 2-player version of Quartet. Please find it in the alternatives folder after updating, or just grab the MRA file attached. (Same RBF as last week's)

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Comencé esta semana tratando de que los juegos del Sistema 16B funcionaran, pero me encontré nuevamente con la MCU i8051. Esta MCU se usa en muchos juegos de arcade, y ya la he enfrentado en el pasado. No hay buenos núcleos de código abierto para ella. Al menos, no buenos desde nuestro punto de vista retro. No he podido hacer que funcione de manera fiable de momento.

Ace se puso en contacto conmigo sobre un problema de sprites en el núcleo de Contra y, al revisar la implementación, descubrimos que faltaba un latch. Se agregó y los archivos en JTBIN se han actualizado para el puerto de MiSTer (de momento).

Esta semana hemos dedicado mucho tiempo al desarrollo de la CPU NeoGeo Pocket. Finalmente estamos cogiendo inercia con esta tarea. Aún así, necesitamos al menos 2-3 meses más para terminar la CPU.

No he podido modificar sustancialmente los archivos RBF del Sistema 16, pero hay un juego que funciona correctamente con solo un error en la pantalla de título que no afecta a la jugabilidad. Esa es la versión para 2 jugadores de Quartet. Encuéntralo en la carpeta de alternativas después de actualizar, o simplemente tome el archivo MRA adjunto. El RBF no cambia.


Comments (13)

O
Oriez · August 14, 2021

Alien syndrome works, passing tennis: after adding credit I have a black screen and altered beast only black screen. I missed something I guess

A
Alexander Holland · July 12, 2021

It is incredible there is no (good) i8051 core. It is one of the first verilog designs we did (having been a VHDL company for decades). Lots of our USB3.x->SATA bridges are powered by 8051. It's very well documented.

N
NegativeStraw · July 11, 2021

Thanks for all the hard work!

Z
Zak Bailey · July 10, 2021

love your work

1
16Bit SPY · July 9, 2021

That's one hell of a work load for the week mate, take a week off, reflect and regroup ❤️💚💙👍🇦🇺😷

D
David Filskov · July 9, 2021

Thank you! :)

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.Poly-Play. · July 9, 2021

It's not possible to get the beta.zip ... server seems to be down :/

F
Filip Kindt · July 9, 2021

Good work!

L
Luis Gomez · July 9, 2021

Thank you for continuing giving us these great games at home Jotego, we're all here for what you have in the works.

A
Adam Atom Ant · July 9, 2021

I don't know if you hear this enough. Thank you for all of this work. I don't support a lot, but your work is something that one could not help but support if they had any morals whatsoever. Thank you again, and I look forward to what you bring in the future.

E
Enrique Lopez · July 9, 2021

Neo Geo Pocket!

f
felleg · July 9, 2021

I wonder what makes the MCU tricky to map. Either way, thanks for the update! I wish success to you and the team!

h
hyp36rmax · July 9, 2021

Keeping rocking JT!