The reason I like the '646 and friends is because
it essentially provides
the register that is needed to hold the high data on a read and the buffer
If you have a unified bus it's a good part. S100 (raw) is not unified so
it's less than helpful.
The compromise is to make the board a channel (like mine) and use a
interface adaptor between it and the drive (IDE-16).
Frankly, I wish the current generation XILINX software
would support the
2000 and 3000 series parts, but the former was end-of-lifed some 10 years
ago and the 3000 has been replaced with the 3000-A series and 3100 series.
The 3030 would make my job MUCH simpler, but I just can't use one due to
software incompatibility.
Blame w96 for that. I have the old generation stuff and run W3.1 (though
I'm trying it under NT4).
That's how they get us to buy more parts and throw
out the old ones, doncha
know!
I just don't bend to that.
Allison