I have 13 of these boards! They are labeled A ... M. I see this selling on Ebay right now for prices ranging from $18 to $90, mostly in China.
The Console runs at the usual 115200 baud. Two out of two boards I tested had bad connections to the console port, so pay attention to that after pulling these out of storage.
I am using an old Qualcomm "wall wart" to power these boards. It is labeled 8.4 volts 400 mA and works just fine.
Board B is my surprise 1G of ram board; the only one. I sort of reserve it for running the onboard linux.
Board C is mounted on a piece of 2x6 lumber and was used for some experiments with an LED panel. It does nothing without an SD card. With an SD card it does a network boot of Kyu. It does an alternating blink of the red/green LED pair once Kyu boots. Kyu announces that it is loading a bitstream. It does have a working reset button.
Board E works just like board C, but does NOT have a working reset button. It boots Kyu and gives us the blink demo.
To start, it would be good to fix the reset button and to mount it nicely on a pretty piece of wood. Some kind of power switch would be good as well.
These boards have no mounting holes! I got frisky and drilled some for board C, but now any metal screws in those holes short power to ground. What I should do is to use my 3D printer to print some "brackets" to slide the boards into. I could use these to securely mount board C and to set up board E.
Also, I should use my hot air rework station to do something about two super bright LED on the board. They have 220 ohm current limiting resistors. Perhaps 1K resistors would yield something more reasonable.
The Kyu image for this board is "bitcoin.bin" and the image I used for these tests was built on January 22, 2025.
cd /Projects/Kyu/src ./config zynq makeI get one error (the ARM compiler is now more picky than the last time I built this). It is from the Dhrystone benchmark, which is an ugly mess of code, but for now we are keeping it around. For some stupid reason it is split into two files. Probably some ancient compiler couldn't handle it otherwise. I make a quick correction. The Dhrystone code still gives warnings, but now it compiles.
I use the "R" command in Kyu to reboot. It seems to run fine.
It announced it is running the HUB75 demo, which apparently was the last thing I was working on with this board.
Tom's software pages / tom@mmto.org