Worked on interrupts more

Wrote a tool that generates digraphs out of the microcode. Also did a bunch of prep work that had to be done before doing more interrupt work, now have instructions to disable/enable interrupts and can individually set/reset FLAGS bits (instead of having to do all at once like before).

Realized I need a read path for FLAGS so that the interrupt microcode can push/pop them, but I’m now (sort of beyond) out of inputs on the XY muxes, so will have to figure that out.