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USB Disk Recorder #teardown & SCSI Tinkering

Micah Scott finds, opens, and then tinkers with a USB disk recorder! Interestingly, the device’s main IC is suspected to contain the “microcontroller, USB interface, flash interface, DC-to-DC converter, battery charger, and all the audio circuitry.” Fun!

This time I find something in my junk drawer with a few teeth marks on it, and it leads to a weirdly specialized CPU built on a super oldschool core.

Continuing the adventures from Part 1, this video wanders along several tangential paths, trying to get some data out of this device worthy of reversing. This time we spend a bit more time in IDA looking for Z80 code, tinker with SCSI trying to break things, and we even do some necromancy in trying to get grumpydisk working.


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