rubydrive

A really incomplete and very early stage Motorola 68000 emulator (Mega Drive) in ruby. It's only capable of running a few instructions which is just sufficient for the "minimal" ROM (which does not do anything useful) at the moment.

Running

First, use bundler to install gems:

bundle install

Run the following command in the repo directory:

bundle exec ruby src/main.rb examples/minimal.bin

Right now, it won't have a lot of output.

To see which instructions it is running, run the following:

DEBUG=1 bundle exec ruby src/main.rb examples/minimal.bin

You should get output like this:

starting rubydrive...
looking at instruction word at 8: 46fc
instruction: #<struct Instruction::MOVE_TO_SR value=9984>
Instruction::MOVE_TO_SR
looking at instruction word at c: 4e71
instruction: #<struct Instruction::NOP>
Instruction::NOP
looking at instruction word at e: 4e71
instruction: #<struct Instruction::NOP>
Instruction::NOP
looking at instruction word at 10: 4a79
instruction: #<struct Instruction::TST target=#<struct Target::AbsoluteLong address=0>, size=2>
Instruction::TST
looking at instruction word at 16: 4e72
instruction: #<struct Instruction::STOP value=9984>
Instruction::STOP
rubydrive finished

This is a really 'minimal' ROM I have prepared. Bigger, ROMS will be added later on.

Testing

Tests can be run with:

bundle exec rake test