36 lines
1.1 KiB
Markdown
36 lines
1.1 KiB
Markdown
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# NEMU
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NEMU(NJU Emulator) is a simple but complete full-system emulator designed for teaching purpose.
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Currently it supports x86, mips32, riscv32 and riscv64.
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To build programs run above NEMU, refer to the [AM project](https://github.com/NJU-ProjectN/abstract-machine).
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The main features of NEMU include
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* a small monitor with a simple debugger
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* single step
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* register/memory examination
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* expression evaluation without the support of symbols
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* watch point
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* differential testing with reference design (e.g. QEMU)
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* snapshot
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* CPU core with support of most common used instructions
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* x86
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* real mode is not supported
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* x87 floating point instructions are not supported
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* mips32
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* CP1 floating point instructions are not supported
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* riscv32
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* only RV32IM
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* riscv64
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* only RV64IM
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* memory
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* paging
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* TLB is optional (but necessary for mips32)
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* protection is not supported
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* interrupt and exception
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* protection is not supported
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* 5 devices
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* serial, timer, keyboard, VGA, audio
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* most of them are simplified and unprogrammable
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* 2 types of I/O
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* port-mapped I/O and memory-mapped I/O
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