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:The mother of all Sharp X1 emulators. First released in January 1999 and last updated in July 1999, X1EMU is designed to be compatible both with [[Intel CPUsPOS_(Pong_Consoles)_CPUs_and_Other_Chips#Intel_CPU.27s|IBM-PCs]] and [[NEC PC-9800 series|PC-98s]] running MS-DOS. The emulator runs in DOS protected mode, as such, it needs a copy of DOS4GW.EXE to sit in the same folder as it. Unlike most of its offspring, it is entirely in Japanese. In late-1990s machines, it might not exhibit this issue, yet in modern computers, its emulation is ridiculously fast, as there seems to be no programmed limitation on the clock speed.