Dayna NB256 NuBus Ethernet Card BD-030 Rev C SSI LC StNic Apple Mac

Dayna NB256 NuBus Ethernet Card BD-030 Rev C SSI LC StNic Apple Mac

The Dayna NB256 is a NuBus Ethernet network card designed for Apple Macintosh computers equipped with NuBus expansion slots. Marketed under Dayna's LC StNic (Small and Simple Network Interface Card) line, this card adds 10Base-T Ethernet connectivity to NuBus-equipped Macs. The board revision is Rev C, PCB designation BD-030.

Specifications & What's Included

• Brand: Dayna
• Model: NB256 (SSI LC StNic)
• PCB / Part Number: BD-030, Rev C
• Bus Interface: NuBus
• Network Standard: Ethernet 10Base-T
• Network Controller Chip: MX MX98902QC (E9323, AC38000·1, Taiwan)
• Oscillator: Abracon 20.0 MHz
• Memory: Multiple ICs visible — includes Hyundai-branded chips
• External Connector: RJ-45 (10Base-T)
• Form Factor: NuBus card
• Country of Manufacture: Taiwan
• Included: Card only — no cables or accessories

Applications

NuBus was Apple's proprietary expansion slot architecture used in Macintosh computers from the mid-1980s through the mid-1990s, including the Mac II family, Quadra series, and LC models with NuBus slots. The Dayna NB256 was used to connect these machines to 10Base-T Ethernet networks — a common need in office and education environments where Macs needed to share files, access print servers, or connect to AppleTalk/TCP-IP networks. Today these cards are sought by collectors and retro-computing enthusiasts maintaining vintage NuBus Mac systems, as well as by anyone running a working classic Mac that needs network access. The MX98902QC Ethernet controller was a widely used single-chip Fast Ethernet solution of the early-to-mid 1990s.