Because hey, why not?
Should be cross-platform, but not guaranteed - you will have to create your own Makefiles (there are also some Windows-only features). The project was recently restarted, so there may be remnants of old code used for re-implementation.
- Real mode
- 1MB of memory
- If an infinite loop (jmp $) occurs, execution will automatically end
- Extensive logging: writes everything to a debug file, including opcode and arguments, and write memory access. Successful jump instructions are also
- A small set of opcodes (see OPCODES.md)
- No protected mode switching implemented yet, so to run a PM sample, you must recompile with protected mode on (see main.cpp)
- Visual Studio 2012 solution
- Four test examples (and their NASM source code):
- call_test.asm: Protected mode Tests calling functionality; sets up two variables, adds them (in a separate function), leaves the result in EAX and sets EBX to 64. Ends in infinite loop.
- loop_test.asm: Protected mode Moves 1 into EAX, and then loops until EAX matches 32 (through shifting left). After finishing, 0xDEADBEEF is moved into ECX. Ends in infinite loop.
- rebuild_test.asm: Protected mode Used to test functionality after restarting project, does a simple addition. Ends in infinite loop.
- bootloader.asm: Real mode Real mode assembly I derivative. Used as an example of "real world" code. Use the command 'halt' to quit.
- A bochsrc.txt configured to run bootloader.bin, so that comparisons against a tried and tested emulator can be made
- compile_asm.bat, a simple batch file that compiles all assembly files with nasm