Zenith 85-3359-01 16-Bit ISA I/O Controller Board 070887 Long Card Vintage PC
Zenith 85-3359-01 16-Bit ISA I/O Controller Board 070887 Long Card Vintage PC
This is a full-length 16-bit ISA I/O controller board manufactured by Zenith, carrying part number 85-3359-01 and PCB date/revision code 070887, as silkscreened directly on the board. The card occupies a standard full-length ISA slot and provides I/O controller functions — including serial and parallel port connectivity — for Zenith desktop PC systems of the era that used 16-bit ISA expansion architecture.
Specifications & What's Included
- Manufacturer: Zenith
- Part Number: 85-3359-01
- PCB Code / Date Stamp: 070887
- Bus Interface: 16-Bit ISA
- Form Factor: Full-Length (Long Card)
- Bracket Connectors: DB-25 (parallel port) and DB-9 (serial port)
- Notable ICs: Hitachi HD14681BAP, Siemens SN74LS245N (multiple), Intel-marked logic ICs
- PCB: Green, fully populated with through-hole components
- Includes: Card only — no cables, manuals, or accessories
Applications
The 16-bit ISA (Industry Standard Architecture) bus was introduced with the IBM PC/AT in 1984 and became the dominant expansion standard for DOS-era desktop PCs through the late 1980s and into the early 1990s. I/O controller cards of this type provided the system with serial (RS-232) and parallel (Centronics/DB-25) port connections, which were essential for attaching printers, modems, and peripheral devices in that era. This specific board was designed for Zenith Data Systems desktop computers — Zenith was a major U.S. manufacturer of IBM-compatible PCs during the 1980s, widely used in business, government, and military installations. By the mid-1990s, ISA I/O functions were integrated directly onto PC motherboards, making standalone ISA I/O cards obsolete. Today these boards are sought by collectors and technicians maintaining or restoring vintage Zenith and compatible IBM AT-class systems.
Condition: For Parts or Not Working
This Zenith 85-3359-01 16-Bit ISA I/O Controller Board (070887) is being sold as-is for parts or repair. Due to its age, we cannot confirm functionality and it is not guaranteed to work. The board appears visually clean with no obvious physical damage — traces, solder joints, and the bracket connectors look intact in photos. ICs and passive components appear present and unmodified. Please view our photo set and contact us if you have any questions. Please note: We have multiple units in stock — yours may not be the one shown in the photos, however, it will be similar in condition and function. Visit Our Store
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