[Gerry O'Brien] tackled his most recent project, designing a flash ROM cartridge for the Sega Game Gear, with great success. Above you can see the test rig he used to reverse engineer the communications between an original ROM chip and the circuit board that it came on. He removed the chip, soldered a ZIF socket to the pads, then used a DIP socket as an adapter for that chip. Connected to each pin is a test lead for a logic analyzer. That’s a heck of a lot of channels to decipher!
It turns out that the cartridges use Integrated Mapping (does anyone have a link explaining this?) so dropping in a flash memory chip is not an option; you need a memory bank controller. [Gerry's] solution to this issue is twofold: you can etch your own board with a controller chip and ZIF socket for the flash chip, or you can modify a Sega Master System cartridge to use as an adapter board. We’ve got pictures of both methods after the break, as well as his five instructional videos walking us through the fabrication process.
This isn’t [Gerry's] first time working with flash cartridges. We looked at his work with Game Boy ROMS earlier in the year.
Welcome to the DCEmu Homebrew and Gaming Network. This Network of sites is owned and ran by fans of the retro consoles and the latest next-gen consoles, we post news on all the consoles we cover about hardware aspects, gaming, modification, Hacking and Homebrew. Homebrew and Emulation are software thats made using free and legal tools to play on games consoles. This Network is the only worldwide network of sites where coders can upload and post news of their own releases and get the credit and comments they deserve for all their hardwork. We have a Network that currently supports PSvita, Nintendo 3DS, WiiU, PS4, Xbox720, Nintendo Wii, Xbox360,Pandora, Dingoo, Wiz, PS3, PS2, Xbox, Gamecube, Nintendo DS, PSP, GBA, Dreamcast, Sega Saturn, Android, Apple, Blackberry, GP32, GP2X, Nintendo 64, Snes, Gameboy, Nes, Virtual Boy, Apple iPhone, Ipad, Ipod Touch, Ipod, Windows Phone and also Mobile Phone Emulation. When new consoles appear we will expand to cover those consoles.
Please help DCEmu become stronger by posting on the forums every day and make our community larger.