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486 motherboard using the OPTi OPTi 82C392, 82C493 chipset

Motherboard published by Unknown

486 motherboard using the OPTi OPTi 82C392, 82C493 chipset screenshot

Listed and emulated in MAME.

486 motherboard using the OPTi OPTi 82C392, 82C493 chipset © 199? Unknown

SOURCES

Machine's Bios.