It's alive! - torvalds/1590A GitHub Wiki
Ok, that's a not-entirely up-to-date board with the boost circuit and a switch to pick between a clean boost or two random sets of diodes.
Not the most interesting board to test, but the newer / better boards will have to wait for a few more days for updated enclosures to arrive.
But it does actually work, and it does fit in the 1590A enclosure.
Admittedly it fits only barely. And the bright yellow with the bright red knobs isn't exactly tasteful. But it's a happy color.