Rare Vintage Socket 4 VLB Baby AT Motherboard - OPTi Premium 82C596 / 82C597 Chipset
Ultra-rare transitional motherboard featuring the Intel Socket 4 interface paired with 32-bit VESA Local Bus (VLB) architecture. Powered by the OPTi Premium chipset, this board bridges the first-generation 64-bit Intel Pentium processor with high-speed VLB expansion cards, making it an exceptional centerpiece for museum-grade retro PC restorations, MS-DOS, and early Windows 95 builds.
Key Specifications:- Platform / Architecture: Socket 4 / VESA Local Bus (VLB) / ISA- CPU Socket: Socket 4 (273-pin PGA ZIF socket with locking lever, 5V)- Supported Processors: Intel Pentium 60 MHz, Intel Pentium 66 MHz, and Intel Pentium OverDrive (PODP5V133)- Chipset: OPTi Premium (82C596 Data Controller + 82C597 System Controller + F82C206 Peripheral Controller)- Memory: 4x 72-pin SIMM sockets (supports 64-bit wide banks, populated in pairs)- Expansion Slots: * 2x 32-bit VLB (VESA Local Bus) slots * 6x 16-bit ISA slots (8 expansion slots total, 2 shared with VLB)- L2 Cache: 16x unpopulated DIP sockets for SRAM cache upgrade- BIOS: AMIBIOS 1993 Pentium CPU ISA BIOS in socket- Keyboard Controller: AMI Mega-KB-H-WP- Integrated Oscillators: 60.000 MHz, 40.000 MHz, 14.318 MHz- Keyboard Port: Standard 5-pin DIN (AT standard)- Power Connector: Standard 12-pin AT power connector (P8/P9)- Onboard Battery: Blue 3.6V barrel battery (BT1)- Form Factor: Baby AT (approx. 8.7" x 13.0" / 22 cm x 33 cm)- Origin: Made in Taiwan R.O.C. (Ver. 1)
Package Includes:- 1x Socket 4 VLB Motherboard (as pictured)
