This modded Dreamcast allows you to use both standard Dreamcast GD discs and also boot games from a Compact Flash card using DreamShell.
This is a quick look around the console and also a comparison of loading times from the optical drive and the CF card.
Full written review and details here: http://www.thedreamcastjunkyard.co.uk/2017/09/hardware-review-gd-rom-compact-flash.html?m=1
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