Companion

The number of continuations in my caller chain. It can be as low as zero, indicating this is a base frame.

Either zero or the hash of this A_Continuation.

The Level Two instruction index at which to resume.

The index into the current continuation's FUNCTION's compiled code's tuple of nybblecodes at which execution will next occur.

An index into this continuation's frame slots. It grows from the top + 1 (empty stack), and at its deepest it just abuts the last local variable.