Add ES5506 configs at format.md

Fix code format

papers/format.md

@@ -1520,6 +1520,10 @@ chips which aren't on this list don't have any flags.
   - 1: 16.67MHz
 - bit 4: stereo (bool)
 
+## 0xb1: Ensoniq ES5506
+
+- bit 0-4: channels (int)
+
 ## 0xb5: tildearrow Sound Unit
 
 - bit 0: clockSel (int)

src/engine/platform/es5506.cpp

@@ -141,8 +141,8 @@ void DivPlatformES5506::acquire(short* bufL, short* bufR, size_t start, size_t l
 }
 
 void DivPlatformES5506::e_pin(bool state) {
-  if (es5506.e_falling_edge()) {
-    if (es5506.voice_update()) { // get channel outputs
+  if (es5506.e_falling_edge()) { // get channel outputs
+    if (es5506.voice_update()) {
       chan[prevChanCycle].lOut=es5506.voice_lout(prevChanCycle);
       chan[prevChanCycle].rOut=es5506.voice_rout(prevChanCycle);
       chan[prevChanCycle].oscOut=CLAMP((chan[prevChanCycle].lOut+chan[prevChanCycle].rOut)>>5,-32768,32767);
@@ -155,8 +155,7 @@ void DivPlatformES5506::e_pin(bool state) {
       }
     }
   }
-  // host interface
-  if (es5506.e_rising_edge()) {
+  if (es5506.e_rising_edge()) { // host interface
     if (cycle) { // wait until delay
       cycle--;
     } else if (!hostIntf8.empty()) {