@6405.adf Sigma Data IDE Adapter
All hail William Walsh for pulling this adapter out of obscurity!
Sigma Data QED/68 IDE Adapter
I'm not bothering with the component IDs on this- they're all PALs or simple logic chips.
I'll guess that this is a REAL simple-dimple IDE controller with a burnt-in drive table (like the one on the IBM MCA IDE adapter)
Went through the add a bit- it has LBA in it. I'll have to install this card and an IDE drive to see fer sure...
AdapterID 06405h IDE Controller for Model 60 & 80
Controller IO Address