I am using the ZVI fast ata controller in my 1200 and no exter driver is needed for OS4.
If you need to use IDEFix etc with yours whan using OS3.x than there is a exter module that needs adding to the kicklayout "MODLE Kickstart/A1200/ATAPIismajik" Remove the leading semicolon. It is about harf way down just befor the Picasso96 bits
Just ckecked
http://www.acube-systems.biz/compatibility and FastATA 1200 MK-III needs AllowBbasePageAcess enabled, see page19 of OS4 Quickstart Guide for more.
Hope this helps Steve
