Compatible emulators

Description

Motherboard published 32 years ago:

UCM-486V30 (c) 1994 Lucky Star

The UCM-486V30 is a mainstream 80486 Baby AT motherboard manufactured by Lucky Star Technology around 1994 to 1995. Built upon a flexible 168-pin Socket 3 architecture, the board is driven by the highly efficient UMC UM8498F (or UM8496F) core logic chipset. It provides comprehensive processor compatibility, natively supporting Intel 486SX/DX/DX2, AMD Am486, and Cyrix chips operating at Front-Side Bus speeds from 25 MHz to 50 MHz, with late revisions supporting 3.3V CPUs via onboard voltage regulators. For expansion, its layout offers three high-performance 32-bit VESA Local Bus (VLB) slots lined up alongside five 16-bit ISA slots. System memory is managed via four 72-pin SIMM sockets supporting up to 64 MB of Fast Page Mode (FPM) RAM, backed by an expandable discrete L2 secondary cache holding up to 256 KB of static SRAM DIP modules.

- TRIVIA -

The Builder's Workhorse: Lucky Star motherboards were staples of the "white box" PC cloning boom in Europe and Asia. The UCM-486V30 was highly praised by budget system integrators because its clean silkscreened jumper charts printed directly on the PCB made configuring CPU voltages, clock multipliers, and bus speeds incredibly straightforward compared to documentation-sparse rivals.

The UMC Trace Efficiency: By utilizing the unified UMC chipset, Lucky Star managed to implement three full VLB expansion slots on a very compact Baby AT footprint. However, following standard VLB hardware limitations of the era, operating a 50 MHz Front-Side Bus typically required setting a jumper to introduce a hardware wait-state on the VLB slots to prevent graphical artifacting or IDE data corruption.

- CONTRIBUTE -

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