a and b are just decoded value bits. That means they can be either one of those ...

		viraptor on April 4, 2012 \| parent \| context \| favorite \| on: Notch's Specification for the In-Game DCPU-16 a and b are just decoded value bits. That means they can be either one of those things. 0x00-0x07: registers themselves, 0x08-0x0f: addressing via register, etc.