Vintage 486 VLB Baby AT Motherboard + Intel i486DX-33 CPU Combo
Classic 486-class motherboard featuring 32-bit VESA Local Bus (VLB) architecture and the SiS 85C471 chipset, paired with an original Intel i486DX 33MHz ceramic processor. Equipped with 4x 72-pin SIMM sockets and 256KB of onboard L2 cache, ideal for period-correct MS-DOS 6.22 and Windows 3.11 / 95 retro gaming builds.
Installed Processor Details:- Brand / Make: Intel- Processor Family: Intel i486DX- Exact Model / Part Number: A80486DX-33- sSpec Number: SX419- Serial / Batch Code: C2179536- Core Clock Speed: 33 MHz- Bus Speed: 33 MHz FSB- Package Type: 168-pin Ceramic PGA (CPGA)- Operating Voltage: 5.0V- Math Coprocessor: Integrated Hardware FPU (Floating Point Unit)- Copyright Inscription: INTEL (M)(C) 1989
Motherboard Specifications:- Platform / Architecture: 486 VLB (VESA Local Bus) / ISA- Chipset: SiS 85C471 System Controller with Green PC Power Management- CPU Socket: Socket 3 (ZIF socket with locking lever)- L2 Cache: 256KB Write-Back Cache installed (9x Paradigm PDM41256SA20P SRAM chips in sockets)- Memory: 4x 72-pin SIMM sockets (supports FPM DRAM)- Expansion Slots: * 3x 32-bit VLB (VESA Local Bus) slots * 5x 16-bit ISA slots (8 expansion slots total, 3 shared with VLB)- BIOS: AMIBIOS 486DX ISA BIOS in socket (Sticker: AB1758449)- Keyboard Controller: AMI MEGAKEY in socket- Clock Generator: AvaSem AV9107-03CN14- External Ports: 1x Standard 5-pin DIN keyboard connector (AT style)- Power Connector: Standard 12-pin AT power connector (P8/P9)- Battery: Factory 3.6V Lithium Inorganic Battery (clean, no corrosion)- Form Factor: Baby AT (approx. 8.7" x 9.8" / 22 cm x 25 cm)
Package Includes:- 1x 486 VLB Motherboard- 1x Intel i486DX-33 Processor (A80486DX-33 SX419, installed in socket)- 9x Paradigm 256KB Cache SRAM Chips (installed in sockets)
