Zenith 85-3202-01 CPU Memory Board Long Card 111285 181-6116-0A-01

Zenith 85-3202-01 CPU Memory Board Long Card 111285 181-6116-0A-01

The Zenith 85-3202-01 is a full-length CPU and memory expansion board produced by Zenith Data Systems for use in their vintage personal computer line. This is a long-card ISA-form-factor board populated densely with SRAM ICs, PAL logic devices, and supporting TTL chips across its full length. The PCB silkscreen confirms the board designation as "CPU/MEMORY BOARD 111285," and a label on the reverse identifies a secondary part number of 181-6116-0A-01.

Specifications & What's Included

• Manufacturer: Zenith Data Systems
• Part Number: 85-3202-01
• Board Designation: CPU/Memory Board
• PCB Silkscreen ID: 111285
• Secondary Part Number (label): 181-6116-0A-01
• Form Factor: Full-length long card
• Bus Interface: ISA (full-length edge connector)
• Connector: Proprietary edge connector — not standard ISA pinout
• Notable ICs visible: 74LS125AN (quad bus buffer), PAL16L8ACN (programmable array logic)
• Board populated with multiple rows of SRAM and TTL logic ICs
• ISA bracket present
• Board only — no cables or accessories included

Applications

Zenith Data Systems was a major U.S. personal computer manufacturer through the 1980s and into the early 1990s, producing rugged and business-class machines including the Z-100 series and related desktop systems. CPU/memory combo boards like this one were a common architecture in that era, combining processor support logic and on-board RAM expansion onto a single full-length card to maximize system memory capacity within the constraints of early PC buses. This board dates from the mid-1980s, consistent with the 111285 date code visible on the PCB silkscreen. Zenith's proprietary connector implementations mean this board is specifically matched to compatible Zenith chassis and backplanes rather than generic ISA systems. Today these boards are primarily sought by collectors and restorers of vintage Zenith systems who need original replacement or spare logic boards.