BusTek BT-747S BT-747D EISA SCSI Host Adapter Controller Card 1002013

BusTek BT-747S BT-747D EISA SCSI Host Adapter Controller Card 1002013

The BusTek BT-747S and BT-747D are full-length EISA SCSI host adapter cards designed to connect SCSI storage devices — hard drives, tape drives, CD-ROM drives, and scanners — to EISA-bus personal computers and workstations. Both models share the same PCB assembly (1002013, made in the USA) and differ primarily in their supported SCSI configuration (single vs. dual channel). The card features a DB50 (50-pin) external SCSI connector on the bracket and internal SCSI headers on the PCB, along with a multi-chip controller layout typical of early-1990s SCSI designs.

Specifications & What's Included

• Models: BT-747S and BT-747D (shared PCB)
• Assembly / MPN: 1002013
• Bus interface: EISA (Extended Industry Standard Architecture)
• SCSI interface: SCSI (50-pin / DB50)
• External connector: DB50 on bracket
• Internal SCSI header(s): present on PCB
• Form factor: Full-length EISA expansion card
• Country of manufacture: Made in USA (printed on PCB)
• Included: card only — no cables, drivers, or documentation

Applications

EISA was introduced in 1988 as a 32-bit extension of the ISA bus, widely adopted in high-performance PCs and server-class workstations of the late 1980s and early 1990s. EISA SCSI host adapters like the BT-747 series were the standard way to connect SCSI storage subsystems — large-capacity hard drives, DAT tape libraries, and optical drives — to EISA platforms from Compaq, HP, AST, and others. BusTek (later acquired by Mylex) was a respected SCSI controller manufacturer of that era, and the BT-747 family competed directly with Adaptec's EISA offerings. Today these cards are sought by vintage computer collectors, retro-computing enthusiasts, and anyone maintaining legacy EISA-based systems that require a SCSI host adapter. EISA slots accept ISA cards as well, but dedicated EISA SCSI adapters like this one deliver full 32-bit bus-mastering performance unavailable to ISA-width cards.