@dinob: That is one interesting system, especially the case, yes? Whomever owned the system did a great job keeping that system in good shape.
Judging by the stickers it would have spent its original working life in a data center providing Legal Intercept services to some fairly small telco. There are tell-tale signs of some pretty hefty full-length PCI cards having been installed for most of its operating life - they probably did the heavy lifting there.
That SBC should most definitely have full ISA support.
For the PCI/ISA SBC boards, you should have full ISA support no matter what from what I have found. I am guessing that that board has an ITE8888 PCI to ISA bridge chip on it... which incidentally has full ISA support including DMA.
Certainly looks like it. Does make me wonder though why my non-PnP card completely failed to work, but if I really want to do stuff with it there's more to do (emm386.exe failed, presumably due to 2GB being too much RAM). TBH this thing goes pretty low down the to-do list right now. It clearly works, and is clearly too new for my preferred era 😉
I've been doing quite a bit of research on the SBC setups as I have a 386DX-40 SBC, a full Pentium 4 PCI/ISA SBC based rackmount computer, and am working on getting stuff for a Pentium 4 PIAGP system although the LPC to ISA and PCI to ISA bridge modules that are needed (either one will work with my SBC and backplane) for ISA support are eluding me.
Good luck with that!
If it turns out I've fried my old 386 CPU and board (messed up CPU orientation 😢 ) I'll be looking for something more 486/Pentium era for this backplane. The one bit of unobtainium I'd love: there exists a DEC Alpha PICMG module...