![]() This late 386DX motherboard also supports the Intel i487SX (A80487) upgrade chip. The onboard cache can be configured from 64KB up to 256KB in eight 28-pin sockets plus one TAG RAM socket.ĬPU support: 80386DX, Am386DX, 80486SX, 80486DX, or 80486DX2. The board also supports the Cyrix Cx486DLC. When used it would disable to existing CPU and bring the computer to the same performance as a 80486DX computer. The Intel 80487 was more than just a math coprocessor for 486-era computers - it was a full 80486DX CPU with integrated math coprocessor, and can be considered the first chip-only (rather than full expansion card) Intel-branded upgrade for supporting 386 and 486SX motherboards. This tells us that the board can support a socketed 386 math coprocessor (the 80387) or the Intel 80487 chip which was released in 1991. The board revision above appears to have a PQFP 386DX CPU soldered in, though the coprocessor socket clearly states it supports a 387 or 487 FPU. This late 386DX motherboard is interesting. FIC was a motherboard manufacturer for the IBM PC and its compatibles during the DOS era. ![]()
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