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Yellowstone 2.0 PCB

The Yellowstone version 2.0 PCBs are here! They sure look shiny. I wonder if they work.

This is the second generation of my FPGA-based disk controller design for the Apple II. In comparison to the version 1.0 PCB, you can see there’s more going on. While it’s nothing in comparison to any professionally-designed device, this will be the most complex thing I’ve ever designed or assembled.

Read 8 comments and join the conversation 

8 Comments so far

  1. Buddy - May 14th, 2021 5:20 pm

    Looks awesome!

  2. Hales - May 15th, 2021 2:54 am

    I concur, tis pretty.

    Are the bigger level shifters easier to get?

  3. Steve - May 15th, 2021 7:15 am

    Their availability looks about the same as the shifters in smaller packages. They are 74LVC245 chips, which are 3.3V bidirectional bus transceivers that are 5V tolerant.

  4. GaryFDes - May 15th, 2021 6:42 pm

    They do look pretty!

  5. keith - May 26th, 2021 1:25 pm

    Looks Great! Awaiting the updates on how they work. Keep up the awesome work

  6. J Thompson - May 31st, 2021 3:54 pm

    This is the Liron drive card replacement, right? I thought this was abandoned! Yay!

  7. Steve - May 31st, 2021 4:39 pm

    It’s more than a Liron replacement: it’s a universal drive controller that supports 5.25 inch drives, dumb 3.5 inch drives like the Apple 3.5, and smart drives like the Unidisk 3.5. It also supports Macintosh floppy drives.

  8. J Thompson - May 31st, 2021 5:08 pm

    Awesome. Please ignore the drooling.

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