This is exactly the problem that I’ve been facing for the last couple weeks. I could get the memory tests to pass at 100% if only the CPU was talking with the external SRAM. As soon as I added in my time slot...
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SRAM PCB built, populated, and is testing good!
The circuit board arrived from Elecrow PCB in China, and it works without modification! My friend Brian from Canada helped me out again, laying out this PCB in short order. He did a great job! Soldering the half-mm...
J68 can now speak with BEMICRO MAX 10 onboard SDRAM
So for the longest time, I’ve wanted to use the onboard 8MB SDRAM that is present on the BEMICRO MAX 10 fpga eval board. This is now a reality! I’ve successfully integrated a controller with some glue logic...
Something old, something new: building a NAS with a few older parts
About eight years ago, I bought a Dell XPS 420 pictured above. This was an Intel Core 2 Quad Q9550 running at 2.83ghz. With 8GB of ram. Despite running reliably for over 8 years, the main problem was that the case was a...
Memory controller work continues….workaround 4MB SRAM add-on
SO here’s a couple hundred dollars of SRAM parts ordered to add on to the FPGA. It goes like this: the memory controller isn’t fully integrated yet into the J68 soft-core, so I’ve decided to whack on 4...
left-justified DAC problems continue
Here you see the analog sound waveform coming out of the DAC at the top in yellow. I think I’m getting closer……I switched from the I2S DAC to a left-justified DAC just because the LJ one is a little...
