For all the confused devs under age 30 in here, this is IDE meaning Integrated Drive Electronics, what later became known as ATA and then retronymmed as PATA.
I installed a bunch of these and loved them compared to the head-scratching misery of SCSI - which had far superior performance but also many more opportunities for things to go wrong. Those BIOS screens brought back memories of watching machines count slowly up to 8mb of RAM and thinking 'what a beast...one day I too shall own a machine of such power.'
That unpopulated 68-pin connector reminds me of SCSI. Perhaps they were intending to make a combo SCSI + IDE controller, or reusing much of the PCB layout from a SCSI HBA?
Obscure piece of hardware! Why would anyone who needs up to 16 drives in a single system not use SCSI? IDE was never designed for more than two drives per bus connector (eg a 3.5” hard drive and a 5.25” zip / cd rom drive).