Building the core

I've completed the CPU code re-engineering and I'm currently putting together a disassembler so that I can debug the new CPU. Once I've got this together I'll build a simple monitor/debugger and start running some tests to ensure the CPU instructions all function as they should. It's all rather monotonous at the moment so I'll spare you the details, but I just wanted to let you know that work is continuing, there's just not a lot to show at the moment.

Hack n Slash

I'm still plodding on with writing the unit tests.  The end is in sight as I've nearly finished the instructions and I think I should be able to output tests a bit quicker when I haven't got to keep calculating opcodes by hand.

Unfortunately, last week I went an bought a copy of Fable II.  What a time sink that has been, and I would've finished the tests by now if it wasn't for that.  Cracking good game though.

Once the tests are complete the next step is to write a monitor/debugger application to wrap the CPU up in.  I want to be able to step through the emulated code and set breakpoints etc.  This will no doubt involve quite a bit of effort but is going to be crucial in keeping me sane as this project progresses.  Once I'm happy that I can accurately emulate the CPU and monitor the code running on it, I can start thinking about turning it into an Amiga.

Of course, I'm making a big assumption that the performance of my code is going to be adequate for the job, but that's a whole new kettle of fish that we'll have to wait for.  I'm just concentrating on developing a clean and robust model for now.