30 de julho de 2026ULSI 80387sx FPU LCC FasMath Math CoProcessor 387SX 16-40 MHz USA SellerULSI 83S87 FPU PLCC FasMath Math Processor 387SX 16-40 MHz. We marked these 25 MHz for a project many years ago but they run flawlessly 16,20,25,33 and 40 MHz.
