From b98ff137531b85b3d7c8a7c25d4b1228d2646753 Mon Sep 17 00:00:00 2001
From: tildearrow <me@tildearrow.org>
Date: Wed, 21 May 2025 15:28:27 -0500
Subject: [PATCH] command stream ALG/FMS/AMS effects

---
 papers/export-tech.md       |  7 +++++++
 src/engine/cmdStream.cpp    |  5 +++++
 src/engine/cmdStreamOps.cpp | 10 ++++++++++
 3 files changed, 22 insertions(+)

diff --git a/papers/export-tech.md b/papers/export-tech.md
index 128cee02b..309d8e6bb 100644
--- a/papers/export-tech.md
+++ b/papers/export-tech.md
@@ -405,4 +405,11 @@ hex | description
  dc | resonance scaling (b)
 ----|------------------------------------
  dd | WonderSwan speaker volume (b)
+----|------------------------------------
+    | **FM commands (continued)**
+ de | ALG (b)
+ df | FMS (b)
+ e0 | AMS (b)
+ e1 | FMS2 (b)
+ e2 | AMS2 (b)
 ```
diff --git a/src/engine/cmdStream.cpp b/src/engine/cmdStream.cpp
index 475761608..f1605426e 100644
--- a/src/engine/cmdStream.cpp
+++ b/src/engine/cmdStream.cpp
@@ -447,6 +447,11 @@ bool DivCSPlayer::tick() {
           case DIV_CMD_SID3_CUTOFF_SCALING:
           case DIV_CMD_SID3_RESONANCE_SCALING:
           case DIV_CMD_WS_GLOBAL_SPEAKER_VOLUME:
+          case DIV_CMD_FM_ALG:
+          case DIV_CMD_FM_FMS:
+          case DIV_CMD_FM_AMS:
+          case DIV_CMD_FM_FMS2:
+          case DIV_CMD_FM_AMS2:
             arg0=(unsigned char)stream.readC();
             break;
           // TWO BYTE COMMANDS
diff --git a/src/engine/cmdStreamOps.cpp b/src/engine/cmdStreamOps.cpp
index 3c1439b15..4a7dc1718 100644
--- a/src/engine/cmdStreamOps.cpp
+++ b/src/engine/cmdStreamOps.cpp
@@ -163,6 +163,11 @@ int DivCS::getCmdLength(unsigned char ext) {
     case DIV_CMD_SID3_CUTOFF_SCALING:
     case DIV_CMD_SID3_RESONANCE_SCALING:
     case DIV_CMD_WS_GLOBAL_SPEAKER_VOLUME:
+    case DIV_CMD_FM_ALG:
+    case DIV_CMD_FM_FMS:
+    case DIV_CMD_FM_AMS:
+    case DIV_CMD_FM_FMS2:
+    case DIV_CMD_FM_AMS2:
       return 1;
     case DIV_CMD_FM_TL:
     case DIV_CMD_FM_AM:
@@ -545,6 +550,11 @@ void writeCommandValues(SafeWriter* w, const DivCommand& c, bool bigEndian) {
     case DIV_CMD_SID3_CUTOFF_SCALING:
     case DIV_CMD_SID3_RESONANCE_SCALING:
     case DIV_CMD_WS_GLOBAL_SPEAKER_VOLUME:
+    case DIV_CMD_FM_ALG:
+    case DIV_CMD_FM_FMS:
+    case DIV_CMD_FM_AMS:
+    case DIV_CMD_FM_FMS2:
+    case DIV_CMD_FM_AMS2:
       w->writeC(c.value);
       break;
     case DIV_CMD_FM_TL: