An Adaptec AHA1740 EISA SCSI Host Adapter
https://digipres.club/system/media_attachments/files/110/978/757/004/393/686/original/1333bfbab76eb7bd.jpg
Here's the one I ordered incorrectly. Adaptec AHA-1740. EISA. Spoiler - you can put an ISA card in an EISA slot, but you can't put an EISA card in an ISA slot.
See the second and third photos to see why that doesn't work...
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