From 509e46417fed75ae261cdaf5e3820277124d8667 Mon Sep 17 00:00:00 2001
From: tildearrow <tildearrow@protonmail.com>
Date: Fri, 6 May 2022 00:09:49 -0500
Subject: [PATCH] OPZ: fix fixed frequency effects

---
 src/engine/platform/tx81z.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/engine/platform/tx81z.cpp b/src/engine/platform/tx81z.cpp
index 056eeaac..c3f7e999 100644
--- a/src/engine/platform/tx81z.cpp
+++ b/src/engine/platform/tx81z.cpp
@@ -919,12 +919,13 @@ int DivPlatformTX81Z::dispatch(DivCommand c) {
     }
     case DIV_CMD_FM_FIXFREQ: {
       if (c.value<0 || c.value>3) break;
+      printf("fixfreq %x\n",c.value2);
       unsigned short baseAddr=chanOffs[c.chan]|opOffs[orderedOps[c.value]];
       DivInstrumentFM::Operator& op=chan[c.chan].state.op[orderedOps[c.value]];
       op.egt=(c.value2>0);
       rWrite(baseAddr+ADDR_RS_AR,(op.ar&31)|(op.egt<<5)|(op.rs<<6));
       if (op.egt) {
-        rWrite(baseAddr+ADDR_MULT_DT,((c.value2>>4)&15)|((c.value2>>8)&7));
+        rWrite(baseAddr+ADDR_MULT_DT,((c.value2>>4)&15)|(((c.value2>>8)&7)<<4));
         rWrite(baseAddr+ADDR_WS_FINE,(c.value2&15)|(op.ws<<4));
       } else {
         rWrite(baseAddr+ADDR_MULT_DT,(op.mult&15)|((op.egt?(op.dt&7):dtTable[op.dt&7])<<4));