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xinyangli 9cca9de2a8
pa1.2: use flex and bason to implement expr parser
2024-01-12 22:16:35 +08:00
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configs NJU-ProjectN/nemu ics2023 initialized 2023-12-21 00:20:36 +08:00
include pa1.1: add handler for x, info, si 2024-01-11 23:00:49 +08:00
resource NJU-ProjectN/nemu ics2023 initialized 2023-12-21 00:20:36 +08:00
scripts pa1.2: use flex and bason to implement expr parser 2024-01-12 22:16:35 +08:00
src pa1.2: use flex and bason to implement expr parser 2024-01-12 22:16:35 +08:00
tools NJU-ProjectN/nemu ics2023 initialized 2023-12-21 00:20:36 +08:00
.clang-format pa1.2: use flex and bason to implement expr parser 2024-01-12 22:16:35 +08:00
.gitignore pa1.2: use flex and bason to implement expr parser 2024-01-12 22:16:35 +08:00
flake.lock nemu: basic devShell 2024-01-11 17:14:41 +08:00
flake.nix fix: failed at quit 2024-01-11 17:36:00 +08:00
Kconfig NJU-ProjectN/nemu ics2023 initialized 2023-12-21 00:20:36 +08:00
LICENSE pa1.2: use flex and bason to implement expr parser 2024-01-12 22:16:35 +08:00
Makefile NJU-ProjectN/nemu ics2023 initialized 2023-12-21 00:20:36 +08:00
README.md NJU-ProjectN/nemu ics2023 initialized 2023-12-21 00:20:36 +08:00

README.md

NEMU

NEMU(NJU Emulator) is a simple but complete full-system emulator designed for teaching purpose. Currently it supports x86, mips32, riscv32 and riscv64. To build programs run above NEMU, refer to the AM project.

The main features of NEMU include

  • a small monitor with a simple debugger
    • single step
    • register/memory examination
    • expression evaluation without the support of symbols
    • watch point
    • differential testing with reference design (e.g. QEMU)
    • snapshot
  • CPU core with support of most common used instructions
    • x86
      • real mode is not supported
      • x87 floating point instructions are not supported
    • mips32
      • CP1 floating point instructions are not supported
    • riscv32
      • only RV32IM
    • riscv64
      • only RV64IM
  • memory
  • paging
    • TLB is optional (but necessary for mips32)
    • protection is not supported
  • interrupt and exception
    • protection is not supported
  • 5 devices
    • serial, timer, keyboard, VGA, audio
    • most of them are simplified and unprogrammable
  • 2 types of I/O
    • port-mapped I/O and memory-mapped I/O