[coreboot] Dual SPI Flash adapter

[Oliver Schinagl]

Hi list,

Unfortunately I have had little feedback so far. But here's a small update.

I have finally received my SO8 memory modules and those babies are 
small. Because of this, I have replaced the SO8M footprint with an SO8W 
footprint, making it quite a bit wider, but should be much easier to 
manually solder. I tried for an hour to fit a 1008 footprint for the 
resistors but there would be hardly any room left for silkscreening. 
Also all the smd compontens that I have to salvage seem to be 0603 
components anyway. I'm sure people will manage to solder 2 resistors.

I've also saw a screenshot of an Asus motherboard that had the bios chip 
right next to a Sata port, in the wrong/different orientation, so I've 
added a 3rd design so all 3 possible insertations are possible. (Left, 
center and right facing connector).

I've attached the gEDA .pcb file with the 3 orientation, with each 
having their individually nets/defs so that the DRC/rat check works. 
When sending out the final rev. I'll copy/paste the silk screens from 
the left design so they all look identical.

If I get no negative feedback, I'll try to send the boards out for 
manufacture next week, so in a month or two I should have about 40 PCB's 
and would be happy to send a few out to coreboot dev's, if there's any 
interest at all :)

Oliver
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