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View topic - Master System 3 Collection 120 Super Jogos

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  • Joined: 26 Feb 2021
  • Posts: 159
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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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  • Joined: 29 Jun 1999
  • Posts: 383
  • Location: Brazil
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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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  • Joined: 05 Sep 2013
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  • Location: Stockholm, Sweden
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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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  • Joined: 13 Mar 2007
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  • Location: Vitória da Conquista, Brazil
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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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  • Joined: 19 Oct 1999
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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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