For the NVATABUS.CAT I was wrong I thought, I misunderstood how the WHQL certication works. I thought that the .CAT wasn't linked to a file but that a XYZ.CAT was used for the XYZ.SYS file. But NVATA.SYS and NVATABUS.SYS are 100% identical. So if a NVATABUS.CAT had existed it will be the same as NVATA.CAT. The IDE remix (I've a little updated it since) could work from nF1 to nF4. I've tested it on nF3 250Gb & nF4 Ultra. It seems that the legacy folder can be a problem sometimes. I don't tested it on textmode.