Daughter Card SBC for P64

[MarkHaysHarris777]

I dunno if any of you remember, but in the 90's and 2k's you could buy a single-board computer that slotted into an ISA or PCI slot and acted as a very, very expensive watchdog for big servers. Well, history is repeating itself: here's a pi zero acting as a daughterboard for a pine64.

can you explain the uses of this daughter board thing..

He just added four more A53 cores to his PineA64 board;  the daughter card can now interact with the PineA64 (maybe) for extended SMP computing, but probably he's got monitor|watchdog in mind here;  the PI can "operate" the PineA64 directly... and there might be some interesting things one might do with that !

Depends what he does with the gpio(s) on both boards, whether they work together or not, or whether there is blue smoke and suffering.