E4 is more of a personal research project then anything else. I wondered what, or how a virtual machine works, and more specifically, how CPUs work in general.

I'm started with virtualizing a real, old CPU, then once I can successfully virtualize it, i'll try and build the real CPU.

Choices:

• AGC (Apollo Guidance Computer) ** More specifically the block 2 version

• DCPU-16 (Mainly because of the vast resources on it, AGC is pretty old - as it's the first integrated circuit computer)

• Split the system in individual files.
  • cpu.h/cpu.c
  • stack.h/stack.c
  • program.h/program.c
  • ...
• Emulate a real CPU (I'm not emulating anything real atm)
• Add the appropriate opcodes
• Ability to read a program from a file. Either text or binary.
• Ability to write assembly code and compile it into correct machine code.

• Create a simple programming language with the VM
  • Somewhat similar to C/JavaScript
  • Steps:
    • Parser/Lexer
    • Compiler
      • First Compile to Assembly
      • Assembly -> Machine Code

The language would be somewhat simple, nothing huge.

MIT

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