chuni/chusan: added LED output to DLLs (will break most DLLs)

Credits: somewhatlurker, skogaby
https://dev.s-ul.net/skogaby/segatools/-/blob/ongeki-15093/

dist/chusan/segatools.ini

@@ -63,16 +63,53 @@ framed=0
 ; Select the monitor to run the game on. (Fullscreen only, 0 =primary screen)
 monitor=0
 
-[led15093]
-; 837-15093-06 LED strip emulation setting.
-enable=1
-
 [chuniio]
 ; Uncomment this if you have custom chuniio implementation.
 ; x86 chuniio to path32, x64 to path64. Both are necessary.
 ;path32=
 ;path64=
 
+[led15093]
+; Enable emulation of the 15093-06 controlled lights, which handle the air tower 
+; RGBs and the rear LED panel (billboard) on the cabinet.
+enable=1
+
+[led]
+; Output billboard LED strip data to a named pipe called "\\.\pipe\chuni_led"
+cabLedOutputPipe=1
+; Output billboard LED strip data to serial
+cabLedOutputSerial=0
+
+; Output slider LED data to the named pipe
+controllerLedOutputPipe=1
+; Output slider LED data to the serial port
+controllerLedOutputSerial=0
+
+; Serial port to send data to if using serial output. Default is COM5.
+;serialPort=COM5
+; Baud rate for serial data
+;serialBaud=921600
+
+; Data output a sequence of bytes, with JVS-like framing.
+; Each "packet" starts with 0xE0 as a sync. To avoid E0 appearing elsewhere,
+; 0xD0 is used as an escape character -- if you receive D0 in the output, ignore
+; it and use the next sent byte plus one instead.
+;
+; After the sync is one byte for the board number that was updated, followed by
+; the red, green and blue values for each LED.
+;
+; Board 0 has 53 LEDs:
+;   [0]-[49]: snakes through left half of billboard (first column starts at top)
+;   [50]-[52]: left side partition LEDs
+;
+; Board 1 has 63 LEDs:
+;   [0]-[59]: right half of billboard (first column starts at bottom)
+;   [60]-[62]: right side partition LEDs
+;
+; Board 2 is the slider and has 31 LEDs:
+;   [0]-[31]: slider LEDs right to left BRG, alternating between keys and dividers
+
+
 ; -----------------------------------------------------------------------------
 ; Input settings
 ; -----------------------------------------------------------------------------