Adaptec SCSI Cards with BIOS-level support to make Floptical (21MB) drives appear as drive letter A: or B: in MS-DOS.
- AHA-1520A (Optional)
- AHA-1522A (Optional)
- Has additional 34-pin floppy connector
- AHA-1520FS
- AHA-1522FS
- Has additional 34-pin floppy connector
- AVA-2820
- AVA-2822
- Has additional 34-pin floppy connector
- AVA-2825
- Has additional 34-pin floppy connector
- AHA-1542CF - maybe only V2.01 of the card (ROM sticker: 553601-00 C BIOS C38D), or MCODE 563D/BIOS C38D