ok so still waiting for the updates to go out from crowdsupply, brief news in the meantime.
revision 2.7.2 pre-production test pcb run has been ordered, i will be assembling those myself, here in taiwan, using my host's equipment. btw i didn't hear from anyone about the offer to send out pre-production cards.
i'm having fun with the rk3288 board: putting on 600-pin 0.6mm pitch bga ICs is tricky but doable. the first board i managed to get access via USB, and learned that it is actually possible to initialise them by uploading u-boot-spl over USB. however the DDR3 RAM would only initialise if the clockrate was limited to 200mhz. the second board i tried, unfortunately the 3.3v power output was shorted to the DDR3 RAM 1.5v line and destroyed $20 worth of RAM ICs and a $20 processor. not doing that again. the third board i am currently trying, i have to get the ACT8846 properly soldered down: it's not initialising (yet) so all outputs measure 0v.
the passthrough card i am still waiting for an adapter cable in order to be able to wire a 2.4.1 revision a20 card's HDMI output to the passthrough card's HDMI input. it has to be micro-hdmi to micro-hdmi hence why an adapter had to be ordered.
l.
--- crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68