Our own developed DragonDrive Flashcart works with all MegaDrive- and Genesis-Consoles.
It's perfect if you want to create your own Homebrew game on cartridge.
It can also be used for Hacks, RePros (be sure to stay on the legal side!) and other uses.
The ROM can be reflashed multiple times, if need be.
Once flashed, it behaves like an original game: Insert it into your console, switch on and play - without any waiting time!
This cartridge supports SRAM battery backed up saves, so you can create games that save the highscore, the played progression, etc.
Please note that this is a 4MB cartridge which means that you need to use a mapper to read and write the SRAM (like Phantasy Star IV does).
The SGDK does support this, the fan-port of Cave Story MD for example works perfectly fine with our flashcart.
We also added a small capacitor on the PCB - which means: You can replace the battery without losing the saved data!
(I removed the battery for 5 minutes and the SRAM was still intact!)
The biggest difference to Krikzz FlashKit Cart MD (besides the added SRAM) is that we're using level shifters instead of resistors. See our notes about that below.
This is the PCB only, but we're also selling empty shells and are also offering an all-in-one Flash-Service.
To flash the PCB yourself, you need to use Krikzz FlashKit Cart Programmer.
Krikzz' Software does NOT support the memory used on the DragonDrive, so you need to use your own software.
It's a quick compile under Linux and can be downloaded here:
* Supports games up to 4MB
* Supports battery backup with 32KB SRAM
* Battery can be replaced without losing the SRAM data
* VARTA Battery is included
* Can be written to multiple times
* Hiqh-Quality PCB developed and produced in Germany, using proper level shifters.
* Standard mapper is used (top 2MB is switched between ROM and SRAM using bit 0 of register 0xa130f1, SRAM is 8-bit at odd addresses).
Some information about the Level Shifters:
There's an article written by db-electronics (you can read it here), which explains how and why flashcarts can damage your console.
In theory, the use of proper level shifters (as we do in this cartridge) is better than simple resistors (as in Krikzz FlashCart MD).
In practical use, no issues or damages are known so far - but it's up to you to decide what you think is better.
The level shifter solution is more expensive - that's why our carts cost a bit more.
Is it worth it? Decide yourself.