Hi,

Although, this would work, given the speed of the vs3100 SCSI would it 
end up any faster than the 10Bt?, does the data need to be physically
commited to disk or would the disk cache operate as a "shared memory" 
interface.? 

I've been working on an FPGA design for a 16bit bus link between 
unibus/qbus <-> ISA bus (The early prototype in discrete logic 
managed something like "hheelloooooo wwwrrllllddd" ).
The FPGA design allows some extra complexity to provide 
synchronisation between the two machines using hardware 
interupts, avoiding the need for this to be handled in software..  
It sits between a DR11C on the DEC side and a 16bit io card on the PC 
side.
    
Have 2 VS3100's and would be quite keen to look into 
anything that gets max I/O between a VS3100 & the world.

Was thinking more along the lines of finding a rom/eprom socket
that I can steal some address space from, preferably something common 
to several models. Any ideas??
Presumably most eproms use less than 100% of the address space allocated 
to them.

Cheers,
  Steve