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View topic - Master System 3 Collection 120 Super Jogos

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  • Joined: 26 Feb 2021
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Master System 3 Collection 120 Super Jogos
Post Posted: Tue Feb 20, 2024 8:08 pm
Hi all,

I got this console from Révo in hope to extract the following previously undumped games:
A Ponte
Air Hockey
Anaconda
Aniversário
Asa Delta
Batalha Naval
Bil Bolha
Blocos Mágicos
Caça Palavras
Canhão
Corrida da Pesada
Corrida de Tampinhas
Encanamento
Faroeste
Força Alienígena
Guerra dos Monstros
Lance Livre
Mexe Mexe Tupi
Mosaico
Natação
Pedreiro Polar
Zôo

A lot has been discovered about this hardware and to his disappointment all those games are in fact Megadrive ROMs not Master System ones.

There are only 3 chips on the motherboard:
- TECTOY-580 (QFP138)= Megadrive on a chip, yes it's actually a MD not a SMS
- 16MB (128Mb) 16 bit flash (TSOP48) with a similar pinout than a MX29L3211 with two repurposed pins to extend addressable size: pin 12 (GND) becomes A21 and pin 36 (!WR) is A22
- Altera EPM3064A CPLD (TQFP100) for the games decoding logic. I populated the missing JTAG port and to my surprise it wasn't even locked (file in attachment)

What's interesting:
- populating the missing SMS cart slot allows to boot physical SMS carts
- replacing the first 4MB of the flash by a MD ROM does boot the game

To be completed...
EPM3064A (3.0).zip (5 KB)
CPLD

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Post Posted: Tue Feb 20, 2024 8:36 pm
Last edited by PrOfUnD Darkness on Fri Feb 23, 2024 12:21 am; edited 1 time in total
That's a cool find congrats! I wonder if they ever thought about releasing a Master-Mega console at some point.
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Post Posted: Wed Feb 21, 2024 9:45 am
PrOfUnD Darkness wrote
I wonder if they ever though about releasing a Master-Mega console at some point.


Probably MegaDrive users wouldn't care that much about SMS games?
I don't know, but it didn't in fact happen.
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Post Posted: Wed Feb 21, 2024 12:27 pm
Thank you for this! Can you share the menu ROM also?
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Post Posted: Wed Feb 21, 2024 9:33 pm
Sure, I was waiting for the green light from Révo and got it now.
But even zipped it's too big to be attached here...
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Post Posted: Wed Feb 21, 2024 10:19 pm
Here it is… it’s apparently implemented as one giant Mega Drive game rather than separate ROMs.
MS3_120_in_1.zip (10.07 MB)

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Post Posted: Thu Feb 22, 2024 8:51 am
to byte swap you can:
dd conv=swab if=MS3_120_in_1.bin of=MS3_120_in_1_swab.bin
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Post Posted: Sat Mar 02, 2024 9:45 pm
Some games have small changes from other releases, like the copyright year,or instructions.
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Post Posted: Sun Jun 16, 2024 2:28 am
Hi, I didn't think this was worth making a thread, but in case anyone is searching about this console or another version that uses the same chip, it's possible to make it sound better and mod it for RGB. Akino_R11NOR wrote a tutorial on his Twitter, I can't post a link because it's one of my first posts.
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Post Posted: Sun Jun 16, 2024 7:36 am
As Twitter is somewhat impossible to use now and will likely not be a stable source, you could copy/paste it here.
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Post Posted: Mon Jun 17, 2024 3:00 am
Maxim wrote
As Twitter is somewhat impossible to use now and will likely not be a stable source, you could copy/paste it here.

Good idea, the pinout is:
R; Pin 9
G; Pin 10
B; Pin 11
C-Sync; Pin 13
He didn't mention which pin has the mono audio, but that's easy to figure out, and of course since it's an RGB mod it needs a board with a THS7316 or something similar. Interestingly he also used the second internal cartridge slot to wire a Mega Drive cartridge port.
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Post Posted: Wed Jun 19, 2024 6:04 pm
Apocalypse wrote

- TECTOY-580 (QFP138)= Megadrive on a chip, yes it's actually a MD not a SMS


This doesn't surprise me since I'd imagine a lot of the SMS-specific chips were out of production at the time and TecToy was churning out GOACs by the bucketload. Interesting that all the games were crammed into a single ROM file though.
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Post Posted: Wed Jun 19, 2024 10:44 pm
ApolloBoy wrote
Apocalypse wrote

- TECTOY-580 (QFP138)= Megadrive on a chip, yes it's actually a MD not a SMS


This doesn't surprise me since I'd imagine a lot of the SMS-specific chips were out of production at the time and TecToy was churning out GOACs by the bucketload. Interesting that all the games were crammed into a single ROM file though.

Not that it affects the console a lot, there is a list here that has less than 30 incompatible games for the Mega Drive with an adapter, plus all of the games that rely on the TMS9918 modes, like SG-1000 and Coleco games. Still, if they wanted to have more authentic hardware they could have asked Majesco, which was manufacturing the Game Gear all the way until 2002, it would have been interesting to have a GG in a Master System shell. If Akino finds a way to install the 3D glasses adapter I'll post here the how to.
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Post Posted: Wed Jun 26, 2024 3:46 pm
Apocalypse wrote

What's interesting:
- populating the missing SMS cart slot allows to boot physical SMS carts
- replacing the first 4MB of the flash by a MD ROM does boot the game

To be completed...


It seems like some people have already tried, but even by restoring the missing components the slot won't work.

This guy said he used the 112 version as a comparison and even then it didn't work.
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Post Posted: Wed Jun 26, 2024 9:35 pm
It might be a case of whatever BIOS is there isn't programmed to detect the cart slot.
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Post Posted: Tue Jul 09, 2024 10:29 pm
Hey there, I've just got a Master System 74 Super Jogos from a street market. From what I've seen it uses the same TECTOY-580.

Until now all the games I've tested using a flash cart works.

Let me know if you guys want me to do any test on it.
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Post Posted: Wed Jul 10, 2024 9:05 am
you can run the SMS Test Suite and confirms that the VDP is detected as a Genesis/MegaDrive one - it should be
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Post Posted: Wed Jul 10, 2024 11:15 am
I've done the test, here are the results:

Hardware tests
JPN?: No
VDP?: 315-5313
TV?: 60Hz (NTSC)
MediaEnable?: No
Z80 type?: CMOS

Model: Genesis/MegaDrive
Region: USA/BRA TV:60Hz (NTSC)

Is there any way I could boot a Mega Drive game on it? LoL
I've tried but I only get a black screen.
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Post Posted: Wed Jul 10, 2024 12:55 pm
NaiAdventure wrote
Is there any way I could boot a Mega Drive game on it? LoL
I've tried but I only get a black screen.


According to Apocalypse (first post of this very same topic) if you change the contents of the internal Flash with an MD game, it will run (the menu you see when you boot the console with no cartridge inserted is an MD ROM). Of course you would have to restore the original contents to get back to the standard functionality.
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Post Posted: Wed Jul 10, 2024 10:59 pm
sverx wrote
NaiAdventure wrote
Is there any way I could boot a Mega Drive game on it? LoL
I've tried but I only get a black screen.


According to Apocalypse (first post of this very same topic) if you change the contents of the internal Flash with an MD game, it will run (the menu you see when you boot the console with no cartridge inserted is an MD ROM). Of course you would have to restore the original contents to get back to the standard functionality.


That's amazing! What a finding.
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