From f1ecd3653bcf153bc979750caf0509e9b06ff528 Mon Sep 17 00:00:00 2001
From: "J.C. Moyer" <jcmoyer32@gmail.com>
Date: Mon, 8 Jun 2026 20:05:55 -0400
Subject: [PATCH] mcu_timer: initialize fields from manual

---
 src/mcu.cpp       | 1 +
 src/mcu_timer.cpp | 8 ++++++++
 src/mcu_timer.h   | 2 ++
 3 files changed, 11 insertions(+)

diff --git a/src/mcu.cpp b/src/mcu.cpp
index 50ca007b..c8066c8f 100644
--- a/src/mcu.cpp
+++ b/src/mcu.cpp
@@ -1761,6 +1761,7 @@ int main(int argc, char *argv[])
     MCU_Reset();
     SM_Reset();
     PCM_Reset();
+    TIMER_Reset();
 
     if (resetType != ResetType::NONE) MIDI_Reset(resetType);
     
diff --git a/src/mcu_timer.cpp b/src/mcu_timer.cpp
index 3736c2a5..b78d5610 100644
--- a/src/mcu_timer.cpp
+++ b/src/mcu_timer.cpp
@@ -60,7 +60,15 @@ void TIMER_Reset(void)
     timer_cycles = 0;
     timer_tempreg = 0;
     memset(frt, 0, sizeof(frt));
+    for (int i = 0; i < 3; ++i)
+    {
+        frt[i].ocra = 0xffff;
+        frt[i].ocrb = 0xffff;
+    }
     memset(&timer, 0, sizeof(timer));
+    timer.tcora = 0xff;
+    timer.tcorb = 0xff;
+    timer.tcsr = 0x10;
 }
 
 void TIMER_Write(uint32_t address, uint8_t data)
diff --git a/src/mcu_timer.h b/src/mcu_timer.h
index 41e0eb1d..4bb4f9f0 100644
--- a/src/mcu_timer.h
+++ b/src/mcu_timer.h
@@ -53,6 +53,8 @@ struct mcu_timer_t {
     uint8_t status_rd;
 };
 
+void TIMER_Reset(void);
+
 void TIMER_Write(uint32_t address, uint8_t data);
 uint8_t TIMER_Read(uint32_t address);
 void TIMER_Clock(uint64_t cycles);