Retro gaming is huge right now, and like probably millions of other people, [wrongbaud] found himself taking possession of a couple faux-classic gaming gadgets over the holidays. But unlike most people, who are now using said devices to replay games from their youth, he decided to tear into his new toys to see how they work.
The first to get pulled apart is a handheld The Oregon Trail game, which Hackaday readers may recall from a teardown we did back when it was first released. His work continues right where our teardown left off, by pulling the game’s two EEPROM chips out and dumping their contents. As expected, [wrongbaud] found that the I2C connected chip contained the game save information, and the SPI flash chip stored the actual game files.
Next up was an HDMI “stick” from Bandai Namco that allows the user to play a selection of NES games. Here again [wrongbaud] liberates the flash chip and dumps it for examination, this time using an ESP32 tool of his own creation. Inside the firmware image he’s able to identify several elements with the help of
binwalk, such as splash screen graphics and text strings.
But perhaps most interestingly, he found that
binwalk was able to automatically extract the NES ROMs themselves. After verifying they were standard ROMs with an NES emulator, he theorizes that repacking the firmware with different ROMs should be possible should anyone feel so inclined.
Both of these hacks are fantastic examples of how you can reverse engineer a device’s firmware with low cost hardware, open source tools, and a healthy dose of patience. Even if you aren’t interested in fiddling with The Oregon Trail or swapping out the Mappy ROM for Contra, this write-up is an invaluable resource for anyone looking to do their own firmware analysis.
This isn’t the first time [wrongbaud] has hacked around inside these extremely popular retro games, either. Just last month we covered some of his previous exploits with the re-released versions of Rampage and Mortal Kombat.
5 thoughts on “Poking Around Inside A Pair Of Classic Gaming Gifts”
bookmarking that site for future reference, nice!
A poc for that Bandai example would be juicy.
Just read the link, additionally interesting for hacking purposes is that embedded certificate.
I suppose the antenna is for Bluetooth.
And the $5 price point (plus availability – selling at Target).
I have one of the Oregon Trail games but haven’t done much with it yet. I didn’t know about debug mode, I wish [wrongbaud] had documented what keys have to be held down to access it. I suppose it won’t be too hard to rediscover.
The keys are Up and “Y” when the thing is booting!
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