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  1. Hi all, I received my Duo last week, and this weekend I've been porting the Acorn Atom FPGA design to run on it. Here's the end result: You can get more details from the thread over at This design currently uses an AVR Soft Processor to run the AtomMMC software stack for the SDCard interface. My next step is to try switching to the ATmega32U4, which will free up quite a lot of FPGA resources. All of the VHDL code is on github: There is also a Duo bit file: If you want to try this out, you'll need the Atom Software Archive. Download from the above thread, unzip it onto a blank FAT32 format MicroSD card, pop in into the Duo and hit Shift-F10 (F10 is mapped to the Atom Break key). Here's a screenshot of the Menu system help page: Search (S) is the single most useful way of finding a specific program, once you know what it's called. GALAXIAN (Bug Byte) is a good program to try first! Please let me know if you manage to get this working, either here, or over on the forums. Dave