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Segasonic Bros. Going From Arcade To Genesis/Mega Drive

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Segasonic Bros. Going From Arcade To Genesis

Or the Mega Drive for our friends on the other side of the pond. The Segasonic Bros. prototype was quite the surprise find that showed up earlier this year; I got a chance to play it at CAX2018, although I was not good at it. For those who would love to play the game on their Sega Genesis, someone is working hard to make that happen:

A hack project to convert the System C2 prototype "SegaSonic Bros" to run on a stock Genesis/Megadrive. It's mostly done except for a few final touches that I'm working on right now.

tem a explicaçao no video legendado em ingles de o por que da conversao ser facilitada em certo pontos.

http://arcadeheroes.com/2018/12/22/newsbytes-2019-releases-d-arcade-christmas-parody-more/

 

Edited by Dav
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Muito legal esse resgate, fazer rodar assim no Mega Drive o jogo completo é muito bom! Mais um pra lista de lançamentos do Mega Drive que só cresce nos últimos tempos! :) 

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A lógica do jogo é que você tem que fazer um círculo de pedras rodeando outras pedras. Meio complicado e contraintuitivo, não é à toa que o teste foi um fracasso e eles cancelaram.

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19 horas atrás, Stormwatch disse:

A lógica do jogo é que você tem que fazer um círculo de pedras rodeando outras pedras. Meio complicado e contraintuitivo, não é à toa que o teste foi um fracasso e eles cancelaram.

Acho que abusaram mesmo... Não é nada intuitivo. Seria mais fácil se tivessem mantido o esquema Puyo Puyo ou Collumns... :lol: 

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Imagina se voce fosse uma criança e na locadora pegasse essa fita pra alugar, a raiva que voce nao ia ficar.

Que jogo ruim.

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quando eu vi o video, pensei que era um clone do jogo original, mas é a propria rom com codigo adicionado entao

quem deve estar fazendo deve ser fodao

nao que isso salve o jogo de ser uma porcaria :troll_face:

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2 horas atrás, burn disse:

quando eu vi o video, pensei que era um clone do jogo original, mas é a propria rom com codigo adicionado entao

quem deve estar fazendo deve ser fodao

nao que isso salve o jogo de ser uma porcaria :troll_face:

sim por isso fiz uma pesquisa sobre essa placa e quais jogos ela teria derrepente algo exclusivo que nao saiu para o Mega Drive ate onde busquei nao encontrei muita informaçao sobre...parece que existe variantes desta placa...

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1 hora atrás, burn disse:

Se não me engano o thunder force de arcade é para essa placa

sim lembrei do site Sega Retro e procurei sobre a placa abaixo as infos:

https://segaretro.org/Sega_System_C#System_C2_games

Hardware

The System C hardware is built on top of the Sega Mega Drive with a few differences that make them incompatible:

  • The 68000 is clocked at ~9Mhz. The Z80 was removed; the faster 68000 allows it to handle sound without slowdown in games.
  • The VDP no longer uses its internal CRAM for palettes. Instead, it relies on external hardware to provide color information. The hardware is capable of producing 4096 possible colors which can be fed to the VDP in a variety of ways.

The System C2 adds a NEC µPD7759 ADPCM sample playback chip and a sample ROM which can be banked (as the chip can only access 128kB of samples at a time). This serves as a replacement for using the YM2612's DAC for samples, and has the extra advantage of not needing to constantly provide sample data to the µPD7759 — the 68000 merely sets the sample ROM bank and writes a sample number to play. However, the µPD7759 can only play one sample at a time.

Technical specifications

See Sega Mega Drive technical specifications for more details on base Mega Drive hardware

This hardware is based closely on the Sega Mega Drive/Genesis hardware, with the main CPU, sound processor and graphics processor being the same, but with the addition of the Altera EPM5032 and Sega 315-5242 color encoder increasing the color palette. The CPU clock speed is slightly faster (8.94 MHz instead of 7.67 MHz), there is no Z80, and the sound chip is driven by the CPU. The DAC is also replaced by the NEC µPD7759, the same as the System 16 hardware.

  • Board composition: Single JAMMA board
  • Main CPU: MC68000 @ 8.948862 MHz (16-bit & 32-bit instructions @ 1.566 MIPS)
  • Sound chips: Yamaha YM3438 @ 7.670453, SN76496 @ 3.579545
  • Optional sound chip: NEC µPD7759 @ 640 kHz (9-bit ADPCM @ 8 kHz sampling rate)
  • Graphics chips: Yamaha YM7101 VDP, Altera EPM5032, Sega 315-5242 color encoder[1][2]
  • Video resolution: 320×224 pixels
  • Color palette: 98,304[3]
  • Sega's 16-bit arcade color palette: 15-bit RGB high color depth (32,768 colors) and 1-bit shadow & highlight that triples up to 98,304 colors.

List of games

System C games

System C2 games

Note: there are a number of other Print Club games omitted from this list because they are undiscovered/undumped/etc.

 

 

https://segaretro.org/Thunder_Force_AC

ThunderForceAC_SystemC2TitleScreen.png

History

This port was ported to the SNES in 1991 as Thunder Spirits without Sega's involvement (it was handled by Toshiba EMI, with Seika publishing in the US). The new music for Planet Haides is included as a bonus track (OMAKE-2) in Thunder Force IV, accessible after beating the game.

Versions

The port is identical to the console version, except Planets Haides and Ellis are completely different, the level layouts are somewhat different, the level select and level intros have been removed and continuing starts you where you died instead of at the beginning of the stage. Furthermore, the game takes advantage of the System C2's µPD7759 ADPCM chip, providing a larger number of voice samples and sampled sound effects — similar to the original X68000 version of Thunder Force II (even borrowing some cues).

Edited by Dav

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na descricao do video tem link de down de um build do mame modificado pra rodar a rom e da propria

SEGURA ESSA EMOCAO :troll_face:

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