Irrespective of 3.5 or 3.9 ROM being fake, the 4000D using 3.1 Rom is Rev 40.68.
The A4000T uses 3.1 Rom, but version 40.70 as this includes the on-board SCSI, which was only available on the A4000T.
40.68 Roms work in an A4000T mobo, but this makes the SCSI non-functional.
IDE should never have been used on the Amiga; Just too much CPU usage! :pissed: