Vintage Rare Retro ZIDA (Lucky Star) 486 Motherboard

4DVS 2.0 Socket 3 SiS 85C471 / SiS 85C407 VLB / ISA slots

📌 Key Features:

• CPU Socket: Socket 3 (ZIF, 237-pin) — supports Intel, AMD, Cyrix 486 (DX, DX2, DX4, 5x86; 3.3V/5V)

• BIOS: AMIBIOS (label: 486DX ISA BIOS (c) 1993, chip marking: AC4642459)

• Chipset: SiS 85C471 + SiS 85C407

• Model: 4DVS 2.0 (printed between VLB slots)

• Manufacturer: ZIDA (Lucky Star)

• Production year: 1995 (based on label: S/N 22574672, No: 091296, 95)

🧩 Slots and × 30-pin SIMM slots (FPM DRAM)

One of the white plastic module latches is broken (see photo 7,8)

Expansion slots:

• 6 × full-length ISA slots (black)

• 1 × short ISA slot (below the BIOS chip)

• 3 × VLB (VESA Local Bus) slots (brown, longer than PCI)

• Note: These are not PCI slots — they are true VLB slots, typical for 486-era boards

Power: 12-pin AT connector (standard P8/P9)

Keyboard port: Round DIN (AT-style)

💾 Additional Chips:

• Keyboard controller: AMIKEY-2 (© '85-'92 Am. Megatrends Inc.)

• 8 DRAM chips near memory slots:

  • NKK 9529 (256K x 16-bit DRAM)

• 1 SRAM chip (right of the NKK (32K x 8 SRAM used as L2 cache)

⚠️ Condition:

• Untested, sold as is

• Broken 1 SIMM slot latch (clearly shown in the photo 7,8)

• No warranty or returns — for collectors, restoration, or parts only

🧾 Identifiers and Labels:

• Board marking: 4DVS 2.0 (between VLB slots)

• Serial Numbers:

  • S/N 091296

  • Year marking: 95

• BIOS chip code: AC4642459

📌 Notes:

This is a vintage collectible motherboard from the 486 era. Ideal for retro PC enthusiasts, restoration projects, or collectors. Please review all photos carefully before purchase and feel free to ask questions.

Weight - 575 g
You will receive what is shown in the photos!
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