This is a vole machine emulator based on the Von Neumann Architecture. It consists of memory, CPU (CU, ALU, registers), and a user interface. Instruction are stored in memory. Each instruction consists of 4 hexadecimal digits, and each memory cell stores 2 hexadecimal digits, meaning that each 2 memory cells make an instruction. A program counter loops over all memory cells and fetches instructions from them, which can then be executed. The UML diagram can be found here.
You can run the program directly from the executable, which can be found in the latest release in the repository. You can also build it directly using Visual Studio with the Desktop Development with C++ pack, the .NET Desktop Development pack, and the C++/CLI support for v143 build tools component. The Visual Studio project solution file is called "Vole-Machine.sln" and can be found in the repository.
Instructions can be written directly in the memory list cells in the user interface, by loading them from a file using the "Load From File" button in the UI, or using the "Batch Add Code" button in the UI. Sample test cases can be found here.
- 1RXY -> Load content of memory cell "XY" into register "R"
- 2RXY -> Load "XY" into register "R"
- 3RXY -> Copy content of register "R" into memory cell "XY"
- 3R00 -> Write content of register "R" to memory cell "00" (write to screen)
- 4xRS -> Copy content of register "R" into register "S"
- 5RST -> Add contents of registers "S" and "T" and store them in two's complement notation into register "R"
- 6RST -> Add contents of registers "S" and "T" and store them in floating point notation into register "R"
- 7RST -> Bitwise OR (⌄) the contents of registers "S" and "T" and store them in register "R"
- 8RST -> Bitwise AND (^) the contents of registers "S" and "T" and store them in register "R"
- 9RST -> Bitwise XOR (⊕) the contents of registers "S" and "T" and store them in register "R"
- ARxX -> Rotate the content of register "R" cyclically right "X" steps
- BRXY -> Jump to instruction in memory cell "XY" if the contents of registers "R" and "0" are equal
- Cxxx -> Halt execution
- DRXY -> Jump to instruction in memory cell "XY" if the content of register "R" is greater than (>) that of register "0"
You can execute instructions by pressing "Fetch", (optionally) "Decode", then "Execute"; pressing the "Step" button; the "Play" button, or the "Run Until Halt" button.
- Invalid instructions are ignored
- To print to screen in hexadecimal form, choose the "Print HEX" option in the screen settings, and to print in ASCII form, choose the "Print ASCII" option
- You can select an address for the program counter to be set at by clicking on the memory list address you want in the UI
- If you want to select an odd address, you can toggle the option "Odd Selection" in memory list settings
- If you want to change the address at which execution starting or instruction loading from file starts, you can change it in the textbox "Starting Address" in memory list settings
- The program works only on Windows