[J-core] Checking in.

Rob Landley rob at landley.net
Fri Dec 6 04:55:12 UTC 2019

Turtle boards have arrived in Canada and Jeff is taking a few to Japan with him.
I believe he's attending Tron Show and should have at least one with him. We
still plan to get them up on crowdsupply early in the new year, but haven't
finished all the bitstream bits to support framebuffer and audio and such yet.

(We also switched from lx25 to lx45 this batch, and the ethernet in the
bitstream doesn't work because we haven't redone the constraints file yet.
Different pinout, the circuitry is being constrained to the wrong part of the
FPGA so the traces are too long and the timing's wrong. All the other I/O works
at least at the smoketest level.)

We have a longish todo list for our next engineering sprint, but haven't managed
to coordinate schedules quite yet. We think we've come up with two small
extensions to the j-core instruction set that would let us do the fast fourier
transforms needed for realtime GPS acquisition (yay). I should do a writeup on
that, but we want to actually implement it first.

I need to completely redo the website but haven't quite opened that can of worms
yet. Still collecting material, such as the start of a writeup on place and
route at:


Activity continues behind the scenes. Juggling a lot of balls...


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