BusLogic BT-946C Fast SCSI-2 PCI Host Adapter Card 50-Pin ASSY 1002183 Rev D

BusLogic BT-946C Fast SCSI-2 PCI Host Adapter Card 50-Pin ASSY 1002183 Rev D

The BusLogic BT-946C is a Fast SCSI-2 host adapter on the PCI bus, designed to connect SCSI peripherals — hard drives, tape drives, optical drives, and scanners — to PCI-based desktop computers and workstations. It provides a 50-pin high-density external SCSI connector and onboard internal SCSI headers for flexible device connectivity. This example is assembly revision Rev D (ASSY 1002183), placing its manufacture in the mid-1990s PCI transition era.

Specifications & What's Included

• Model: BusLogic BT-946C
• Assembly Number: ASSY 1002183
• Hardware Revision: Rev D
• Bus Interface: PCI (full-height card)
• SCSI Standard: Fast SCSI-2
• External Connector: 50-pin high-density SCSI
• Internal SCSI headers visible on PCB
• Main Controller IC: BusLogic BT-946C (large center IC, BusLogic-marked)
• Onboard SRAM: Alliance AS7C164-20JC (date code 9513 — manufactured 1995)
• PCB is clean with no visible damage or broken components
• Card only — no cables or software included

Applications

BusLogic (later acquired by Mylex) produced a well-regarded line of SCSI host adapters throughout the 1990s, widely used in workstations running Windows NT, OS/2, NetWare, and various Unix variants. The BT-946C targets the mid-1990s PCI workstation and server market, providing Fast SCSI-2 throughput (up to 10 MB/s) for attaching SCSI hard drives, tape backup units, CD-ROM drives, and scanners. PCI SCSI adapters of this generation are still sought for maintaining legacy workstations, vintage computing systems, and older servers that depend on 50-pin SCSI peripherals. BusLogic cards were also notable for their compatibility with VMware early hypervisors, which emulated the BusLogic virtual SCSI adapter — making original BusLogic hardware relevant even in virtualization and retro-computing contexts today.