Ted Fried's MicroCore Labs Projects which include microsequencer-based FPGA cores and emulators for the 8088, 8086, 8051, 6502, 68000, Z80, Risc-V, and also Typewriter and EPROM Emulator projects.
NT Virtual DOS Machine. Not the real one, but this one runs on 64-bit Windows (x64 and ARM64). It also runs on Linux (32 and 64 bit) and MacOS.
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