[ChainOfFools]

That is correct, power only. Even with the bridge board installed the Amiga bus could not talk directly to the ISA side, any communication went through dual port ram on the bridgeboard - signals were in no way multiplexed between the two buses directly.

[rbanffy]

Such a missed opportunity... It'd have allowed Amigas to easily tap the graphics hardware becoming available to ISA machines. Even a plain (and cheap) bridge board with just the bus interfaces would be a huge enabler that could take the Amiga out of its multimedia (and NTSC-timings) niche.