## Link to GitHub Issue or related Pull Request, if one exists
#618
## Description of change
Add overlay for subscreen.
Add an option for no subscreen window.
Use the same "force redraw subscreen" logic we used in SDVX to fix the
same issue.
Known issues:
* still crashing when running windowed if there is only one monitor
* having only one monitor causes sunscreen overlay to not work
(NumberOfAdaptersInGroup issue?)
## Testing
## Link to GitHub Issue or related Pull Request, if one exists
#618
## Description of change
Basic support for lights - subwoofer RGB and button lights.
## Testing
Tested on title screen and in-game.
Tested beat pop as well since that lights up the colors in white/blue.
## Link to GitHub Issue or related Pull Request, if one exists
#618
## Description of change
Turns out running this with bi2x doesn't process buttons properly, so we
have to use bi3a.
## Testing
Seems playable now.
## Link to GitHub Issue or related Pull Request, if one exists
#618
## Description of change
Implement BI2X hook I/O for service/test/coin/headphones and the deka
pop-kuns.
## Link to GitHub Issue or related Pull Request, if one exists
#618
## Description of change
The game expects the main display to be *not* HDMI, and at port 2.
Hooking DisplayConfigGetDeviceInfo allows us to boot the game on any
monitor.
Add basic I/O hook. It gets stuck in `USB I/O Checking...` for a couple
minutes but it'll eventually skip and boot to title screen.
## Testing
ugh.
bicarusandGitHub
sp2xdev