diff --git a/Core/Inc/floppy.h b/Core/Inc/floppy.h
index 45a0a5d..860ff3e 100644
--- a/Core/Inc/floppy.h
+++ b/Core/Inc/floppy.h
@@ -1,10 +1,22 @@
-//
-// Created by Vlad on 11.10.2023.
-//
-
 #ifndef FLOPPOTRON_FLOPPY_H
 #define FLOPPOTRON_FLOPPY_H
 
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+    /**
+     * Функция, вызываемая в прерывании таймера несущей частоты
+     */
+    void FloppySoundTickHandler();
+
+    /**
+     * Функция, вызываемая в прерывании таймера времени (по умолчанию должно быть время 100bpm)
+     */
+    void FloppyTrackTick();
+#ifdef __cplusplus
+};
+#endif
 
 #endif //FLOPPOTRON_FLOPPY_H
diff --git a/Core/Inc/main.h b/Core/Inc/main.h
index 054f4bf..ddcb5d8 100644
--- a/Core/Inc/main.h
+++ b/Core/Inc/main.h
@@ -57,12 +57,20 @@ void Error_Handler(void);
 /* USER CODE END EFP */
 
 /* Private defines -----------------------------------------------------------*/
-#define STEP1_Pin GPIO_PIN_0
-#define STEP1_GPIO_Port GPIOA
-#define DIR1_Pin GPIO_PIN_1
+#define DIR1_Pin GPIO_PIN_0
 #define DIR1_GPIO_Port GPIOA
-#define TEST_Pin GPIO_PIN_2
-#define TEST_GPIO_Port GPIOA
+#define STEP1_Pin GPIO_PIN_1
+#define STEP1_GPIO_Port GPIOA
+#define SEL1_Pin GPIO_PIN_2
+#define SEL1_GPIO_Port GPIOA
+#define DIR2_Pin GPIO_PIN_3
+#define DIR2_GPIO_Port GPIOA
+#define STEP2_Pin GPIO_PIN_4
+#define STEP2_GPIO_Port GPIOA
+#define SEL2_Pin GPIO_PIN_5
+#define SEL2_GPIO_Port GPIOA
+#define SOUND_TICK_Pin GPIO_PIN_11
+#define SOUND_TICK_GPIO_Port GPIOB
 
 /* USER CODE BEGIN Private defines */
 
diff --git a/Core/Inc/stm32f1xx_it.h b/Core/Inc/stm32f1xx_it.h
index a85ae55..d120170 100644
--- a/Core/Inc/stm32f1xx_it.h
+++ b/Core/Inc/stm32f1xx_it.h
@@ -56,6 +56,7 @@ void DebugMon_Handler(void);
 void PendSV_Handler(void);
 void SysTick_Handler(void);
 void USB_LP_CAN1_RX0_IRQHandler(void);
+void TIM3_IRQHandler(void);
 void TIM4_IRQHandler(void);
 /* USER CODE BEGIN EFP */
 
diff --git a/Core/Src/floppy.cpp b/Core/Src/floppy.cpp
index 33d58b4..90efe9f 100644
--- a/Core/Src/floppy.cpp
+++ b/Core/Src/floppy.cpp
@@ -1,3 +1,230 @@
-//
-// Created by Vlad on 11.10.2023.
-//
+#include "floppy.h"
+#include "main.h"
+
+#define FLOPPOTRON_TICK_SPEED (uint16_t)(72000000 / 3600)
+#define FLOPPOTRON_SOUND_FREQ (FLOPPOTRON_TICK_SPEED / 2)
+
+#define FLOPPOTRON_MAX_STEPS (100 * 2 * 2)
+
+// класс, описывающий программный таймер для флоппи привода, но мы сделаем вместо него структуру
+struct FloppyDrive {
+public:
+    uint16_t cnt = 0; // текущий счетчик таймера
+    uint16_t top = 0; // верхнее значение таймера
+    uint16_t curr_step = 0; // текущий шаг флоппи привода
+    bool isStarted = false; // запущен ли таймер
+
+    GPIO_TypeDef* gpio{};
+    const uint16_t gpioDirBit{}; // бит ноги GPIO для подключения к Floppy::DIR
+    const uint16_t gpioStepBit{}; // бит ноги GPIO для подключения к Floppy::STEP
+    const uint16_t gpioSelBit{}; // бит ноги GPIO для подключения к Floppy::DRVSB (Drive select B)
+
+    void setFreq(uint16_t freq) {
+        // freq = FLOPPOTRON_SOUND_FREQ / top
+        top = FLOPPOTRON_SOUND_FREQ / freq;
+    }
+
+    void setEnable(bool en) {
+        isStarted = en;
+    }
+
+    void tick() {
+        if (isStarted) {
+            cnt++;
+            if (cnt >= top) {
+                cnt = 0;
+                curr_step++;
+                if (curr_step >= FLOPPOTRON_MAX_STEPS) {
+                    curr_step = 0;
+                }
+                if (curr_step & 1) {
+                    // нечетные шаги, это тик направления
+                    if (curr_step < FLOPPOTRON_MAX_STEPS / 2) {
+                        gpio->ODR |= gpioDirBit;
+                    } else {
+                        gpio->ODR &= ~gpioDirBit;
+                    }
+                } else {
+                    // четные шаги, это шаги мотора
+                    gpio->ODR ^= gpioStepBit;
+                }
+            }
+        } else {
+            cnt = 0;
+        }
+    }
+};
+
+FloppyDrive drives[] = {
+        {.gpio = DIR1_GPIO_Port, .gpioDirBit = DIR1_Pin, .gpioStepBit = STEP1_Pin},
+        {.gpio = DIR2_GPIO_Port, .gpioDirBit = DIR2_Pin, .gpioStepBit = STEP2_Pin},
+};
+
+
+void FloppySoundTickHandler() {
+    for (auto& drive:drives) {
+        drive.tick();
+    }
+}
+
+#define FT_CMD_NOTES_ON 0x1000
+#define FT_CMD_NOTES_OFF 0x2000
+#define FT_CMD_WAIT 0x3000
+
+// составная команда - частота на
+#define FT_CMD_SET_FRQ1 0x8000
+#define FT_CMD_SET_FRQ2 0x9000
+
+#define FT_CMD_STOP 0x0000
+#define FT_CMD_MASK 0xF000
+
+
+// хандлер для проигрывания нот
+void FloppyTrackTick() {
+    // байткод для 100bpm, тестовая мелодия
+    const static uint16_t bytecode[] = {
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 165, FT_CMD_WAIT | 50, // '3'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 247, FT_CMD_WAIT | 50, // '7'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 196, FT_CMD_WAIT | 50, // '5'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 247, FT_CMD_WAIT | 50, // '7'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 165, FT_CMD_WAIT | 50, // '3'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 247, FT_CMD_WAIT | 50, // '7'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 196, FT_CMD_WAIT | 50, // '5'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 247, FT_CMD_WAIT | 50, // '7'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 147, FT_CMD_WAIT | 50, // '2'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 247, FT_CMD_WAIT | 50, // '7'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 196, FT_CMD_WAIT | 50, // '5'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 247, FT_CMD_WAIT | 50, // '7'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 147, FT_CMD_WAIT | 50, // '2'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 247, FT_CMD_WAIT | 50, // '7'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 196, FT_CMD_WAIT | 50, // '5'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 247, FT_CMD_WAIT | 50, // '7'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 147, FT_CMD_WAIT | 50, // '2'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 247, FT_CMD_WAIT | 50, // '7'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 174, FT_CMD_WAIT | 50, // '4'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 247, FT_CMD_WAIT | 50, // '7'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 147, FT_CMD_WAIT | 50, // '2'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 247, FT_CMD_WAIT | 50, // '7'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 174, FT_CMD_WAIT | 50, // '4'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 247, FT_CMD_WAIT | 50, // '7'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 147, FT_CMD_WAIT | 50, // '2'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 220, FT_CMD_WAIT | 50, // '6'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 174, FT_CMD_WAIT | 50, // '4'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 220, FT_CMD_WAIT | 50, // '6'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 147, FT_CMD_WAIT | 50, // '2'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 220, FT_CMD_WAIT | 50, // '6'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 174, FT_CMD_WAIT | 50, // '4'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 220, FT_CMD_WAIT | 50, // '6'
+//            FT_CMD_NOTES_OFF | 3, FT_CMD_WAIT | 50, // ' '
+//            FT_CMD_NOTES_OFF | 3, FT_CMD_WAIT | 50, // ' '
+//            FT_CMD_NOTES_OFF | 3, FT_CMD_WAIT | 50, // ' '
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 165, FT_CMD_WAIT | 50, // '3'
+//            FT_CMD_NOTES_OFF | 3, FT_CMD_WAIT | 50, // ' '
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 196, FT_CMD_WAIT | 50, // '5'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 174, FT_CMD_WAIT | 50, // '4'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 196, FT_CMD_WAIT | 50, // '5'
+//            FT_CMD_NOTES_OFF | 3, FT_CMD_WAIT | 50, // ' '
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 247, FT_CMD_WAIT | 50, // '7'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 262, FT_CMD_WAIT | 50, // '1''
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 247, FT_CMD_WAIT | 50, // '7'
+//            FT_CMD_NOTES_OFF | 3, FT_CMD_WAIT | 50, // ' '
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 147, FT_CMD_WAIT | 50, // '2'
+//            FT_CMD_NOTES_OFF | 3, FT_CMD_WAIT | 50, // ' '
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 174, FT_CMD_WAIT | 50, // '4'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 196, FT_CMD_WAIT | 50, // '5'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 174, FT_CMD_WAIT | 50, // '4'
+//            FT_CMD_NOTES_OFF | 3, FT_CMD_WAIT | 50, // ' '
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 196, FT_CMD_WAIT | 50, // '5'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 220, FT_CMD_WAIT | 50, // '6'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 196, FT_CMD_WAIT | 50, // '5'
+//            FT_CMD_NOTES_OFF | 3, FT_CMD_WAIT | 50, // ' '
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 147, FT_CMD_WAIT | 50, // '2'
+//            FT_CMD_NOTES_OFF | 3, FT_CMD_WAIT | 50, // ' '
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 174, FT_CMD_WAIT | 50, // '4'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 165, FT_CMD_WAIT | 50, // '3'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 174, FT_CMD_WAIT | 50, // '4'
+//            FT_CMD_NOTES_OFF | 3, FT_CMD_WAIT | 50, // ' '
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 247, FT_CMD_WAIT | 50, // '7'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 262, FT_CMD_WAIT | 50, // '1''
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 247, FT_CMD_WAIT | 50, // '7'
+//            FT_CMD_NOTES_OFF | 3, FT_CMD_WAIT | 50, // ' '
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 147, FT_CMD_WAIT | 50, // '2'
+//            FT_CMD_NOTES_OFF | 3, FT_CMD_WAIT | 50, // ' '
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 174, FT_CMD_WAIT | 50, // '4'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 165, FT_CMD_WAIT | 50, // '3'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 174, FT_CMD_WAIT | 50, // '4'
+//            FT_CMD_NOTES_OFF | 3, FT_CMD_WAIT | 50, // ' '
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 196, FT_CMD_WAIT | 50, // '5'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 220, FT_CMD_WAIT | 50, // '6'
+//            FT_CMD_NOTES_ON | 1, FT_CMD_SET_FRQ1 | 196, FT_CMD_WAIT | 50, // '5'
+
+            // недо-имперский марш
+            FT_CMD_NOTES_ON | 3, FT_CMD_SET_FRQ1 | 165, FT_CMD_SET_FRQ2 | 165, FT_CMD_WAIT | 25, // '3'
+            FT_CMD_NOTES_OFF | 3, FT_CMD_WAIT | 25, // ' '
+            FT_CMD_NOTES_ON | 3, FT_CMD_SET_FRQ1 | 165, FT_CMD_SET_FRQ2 | 165, FT_CMD_WAIT | 25, // '3'
+            FT_CMD_NOTES_OFF | 3, FT_CMD_WAIT | 25, // ' '
+            FT_CMD_NOTES_ON | 3, FT_CMD_SET_FRQ1 | 165, FT_CMD_SET_FRQ2 | 165, FT_CMD_WAIT | 25, // '3'
+            FT_CMD_NOTES_OFF | 3, FT_CMD_WAIT | 25, // ' '
+            FT_CMD_NOTES_ON | 3, FT_CMD_SET_FRQ1 | 131, FT_CMD_SET_FRQ2 | 131, FT_CMD_WAIT | 25, // '1'
+            FT_CMD_NOTES_OFF | 3, FT_CMD_WAIT | 25, // ' '
+            FT_CMD_NOTES_ON | 3, FT_CMD_SET_FRQ1 | 196, FT_CMD_SET_FRQ2 | 196, FT_CMD_WAIT | 25, // '5'
+            FT_CMD_NOTES_ON | 3, FT_CMD_SET_FRQ1 | 165, FT_CMD_SET_FRQ2 | 165, FT_CMD_WAIT | 25, // '3'
+            FT_CMD_NOTES_OFF | 3, FT_CMD_WAIT | 25, // ' '
+            FT_CMD_NOTES_ON | 3, FT_CMD_SET_FRQ1 | 131, FT_CMD_SET_FRQ2 | 131, FT_CMD_WAIT | 25, // '1'
+            FT_CMD_NOTES_OFF | 3, FT_CMD_WAIT | 25, // ' '
+            FT_CMD_NOTES_ON | 3, FT_CMD_SET_FRQ1 | 196, FT_CMD_SET_FRQ2 | 196, FT_CMD_WAIT | 25, // '5'
+            FT_CMD_NOTES_ON | 3, FT_CMD_SET_FRQ1 | 165, FT_CMD_SET_FRQ2 | 165, FT_CMD_WAIT | 25, // '3'
+
+            FT_CMD_NOTES_OFF | 3, FT_CMD_WAIT | 500,
+            FT_CMD_STOP
+    };
+
+    static const uint16_t* pc = bytecode;
+    static uint16_t wait = 0;
+
+    if (wait == 0) {
+        while (wait == 0) {
+            uint16_t cmd = *(pc++);
+            uint16_t value = cmd & (~FT_CMD_MASK);
+            switch (cmd & FT_CMD_MASK) {
+                case FT_CMD_STOP:
+                    pc = bytecode; // просто все начнем сначала
+                    drives[0].setEnable(false);
+                    drives[1].setEnable(false);
+                    break;
+
+                case FT_CMD_NOTES_ON:
+                    if (value & 1) {
+                        drives[0].setEnable(true);
+                    }
+                    if (value & 2) {
+                        drives[1].setEnable(true);
+                    }
+                    break;
+
+                case FT_CMD_NOTES_OFF:
+                    if (value & 1) {
+                        drives[0].setEnable(false);
+                    }
+                    if (value & 2) {
+                        drives[1].setEnable(false);
+                    }
+                    break;
+
+                case FT_CMD_WAIT:
+                    wait = value;
+                    break;
+
+                case FT_CMD_SET_FRQ1:
+                    drives[0].setFreq(value);
+                    break;
+
+                case FT_CMD_SET_FRQ2:
+                    drives[1].setFreq(value);
+                    break;
+            }
+        }
+    } else {
+        wait--;
+    }
+}
\ No newline at end of file
diff --git a/Core/Src/main.c b/Core/Src/main.c
index 94483a4..f5a6b4d 100644
--- a/Core/Src/main.c
+++ b/Core/Src/main.c
@@ -22,7 +22,7 @@
 
 /* Private includes ----------------------------------------------------------*/
 /* USER CODE BEGIN Includes */
-
+#include "floppy.h"
 /* USER CODE END Includes */
 
 /* Private typedef -----------------------------------------------------------*/
@@ -41,6 +41,7 @@
 /* USER CODE END PM */
 
 /* Private variables ---------------------------------------------------------*/
+TIM_HandleTypeDef htim3;
 TIM_HandleTypeDef htim4;
 
 /* USER CODE BEGIN PV */
@@ -51,6 +52,7 @@ TIM_HandleTypeDef htim4;
 void SystemClock_Config(void);
 static void MX_GPIO_Init(void);
 static void MX_TIM4_Init(void);
+static void MX_TIM3_Init(void);
 /* USER CODE BEGIN PFP */
 
 /* USER CODE END PFP */
@@ -90,9 +92,11 @@ int main(void)
   MX_GPIO_Init();
   MX_TIM4_Init();
   MX_USB_DEVICE_Init();
+  MX_TIM3_Init();
   /* USER CODE BEGIN 2 */
 
     HAL_TIM_Base_Start_IT(&htim4);
+    HAL_TIM_Base_Start_IT(&htim3);
 
   /* USER CODE END 2 */
 
@@ -153,6 +157,51 @@ void SystemClock_Config(void)
   }
 }
 
+/**
+  * @brief TIM3 Initialization Function
+  * @param None
+  * @retval None
+  */
+static void MX_TIM3_Init(void)
+{
+
+  /* USER CODE BEGIN TIM3_Init 0 */
+
+  /* USER CODE END TIM3_Init 0 */
+
+  TIM_ClockConfigTypeDef sClockSourceConfig = {0};
+  TIM_MasterConfigTypeDef sMasterConfig = {0};
+
+  /* USER CODE BEGIN TIM3_Init 1 */
+
+  /* USER CODE END TIM3_Init 1 */
+  htim3.Instance = TIM3;
+  htim3.Init.Prescaler = 71;
+  htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
+  htim3.Init.Period = 9999;
+  htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
+  htim3.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
+  if (HAL_TIM_Base_Init(&htim3) != HAL_OK)
+  {
+    Error_Handler();
+  }
+  sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
+  if (HAL_TIM_ConfigClockSource(&htim3, &sClockSourceConfig) != HAL_OK)
+  {
+    Error_Handler();
+  }
+  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
+  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
+  if (HAL_TIMEx_MasterConfigSynchronization(&htim3, &sMasterConfig) != HAL_OK)
+  {
+    Error_Handler();
+  }
+  /* USER CODE BEGIN TIM3_Init 2 */
+
+  /* USER CODE END TIM3_Init 2 */
+
+}
+
 /**
   * @brief TIM4 Initialization Function
   * @param None
@@ -212,17 +261,31 @@ static void MX_GPIO_Init(void)
   /* GPIO Ports Clock Enable */
   __HAL_RCC_GPIOD_CLK_ENABLE();
   __HAL_RCC_GPIOA_CLK_ENABLE();
+  __HAL_RCC_GPIOB_CLK_ENABLE();
 
   /*Configure GPIO pin Output Level */
-  HAL_GPIO_WritePin(GPIOA, STEP1_Pin|DIR1_Pin|TEST_Pin, GPIO_PIN_RESET);
+  HAL_GPIO_WritePin(GPIOA, DIR1_Pin|STEP1_Pin|SEL1_Pin|DIR2_Pin
+                          |STEP2_Pin|SEL2_Pin, GPIO_PIN_RESET);
 
-  /*Configure GPIO pins : STEP1_Pin DIR1_Pin TEST_Pin */
-  GPIO_InitStruct.Pin = STEP1_Pin|DIR1_Pin|TEST_Pin;
+  /*Configure GPIO pin Output Level */
+  HAL_GPIO_WritePin(SOUND_TICK_GPIO_Port, SOUND_TICK_Pin, GPIO_PIN_RESET);
+
+  /*Configure GPIO pins : DIR1_Pin STEP1_Pin SEL1_Pin DIR2_Pin
+                           STEP2_Pin SEL2_Pin */
+  GPIO_InitStruct.Pin = DIR1_Pin|STEP1_Pin|SEL1_Pin|DIR2_Pin
+                          |STEP2_Pin|SEL2_Pin;
   GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
   GPIO_InitStruct.Pull = GPIO_NOPULL;
   GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
   HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
 
+  /*Configure GPIO pin : SOUND_TICK_Pin */
+  GPIO_InitStruct.Pin = SOUND_TICK_Pin;
+  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+  GPIO_InitStruct.Pull = GPIO_NOPULL;
+  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
+  HAL_GPIO_Init(SOUND_TICK_GPIO_Port, &GPIO_InitStruct);
+
 /* USER CODE BEGIN MX_GPIO_Init_2 */
 /* USER CODE END MX_GPIO_Init_2 */
 }
diff --git a/Core/Src/stm32f1xx_hal_msp.c b/Core/Src/stm32f1xx_hal_msp.c
index 997e60c..4beb783 100644
--- a/Core/Src/stm32f1xx_hal_msp.c
+++ b/Core/Src/stm32f1xx_hal_msp.c
@@ -88,7 +88,21 @@ void HAL_MspInit(void)
 */
 void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* htim_base)
 {
-  if(htim_base->Instance==TIM4)
+  if(htim_base->Instance==TIM3)
+  {
+  /* USER CODE BEGIN TIM3_MspInit 0 */
+
+  /* USER CODE END TIM3_MspInit 0 */
+    /* Peripheral clock enable */
+    __HAL_RCC_TIM3_CLK_ENABLE();
+    /* TIM3 interrupt Init */
+    HAL_NVIC_SetPriority(TIM3_IRQn, 0, 0);
+    HAL_NVIC_EnableIRQ(TIM3_IRQn);
+  /* USER CODE BEGIN TIM3_MspInit 1 */
+
+  /* USER CODE END TIM3_MspInit 1 */
+  }
+  else if(htim_base->Instance==TIM4)
   {
   /* USER CODE BEGIN TIM4_MspInit 0 */
 
@@ -113,7 +127,21 @@ void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* htim_base)
 */
 void HAL_TIM_Base_MspDeInit(TIM_HandleTypeDef* htim_base)
 {
-  if(htim_base->Instance==TIM4)
+  if(htim_base->Instance==TIM3)
+  {
+  /* USER CODE BEGIN TIM3_MspDeInit 0 */
+
+  /* USER CODE END TIM3_MspDeInit 0 */
+    /* Peripheral clock disable */
+    __HAL_RCC_TIM3_CLK_DISABLE();
+
+    /* TIM3 interrupt DeInit */
+    HAL_NVIC_DisableIRQ(TIM3_IRQn);
+  /* USER CODE BEGIN TIM3_MspDeInit 1 */
+
+  /* USER CODE END TIM3_MspDeInit 1 */
+  }
+  else if(htim_base->Instance==TIM4)
   {
   /* USER CODE BEGIN TIM4_MspDeInit 0 */
 
diff --git a/Core/Src/stm32f1xx_it.c b/Core/Src/stm32f1xx_it.c
index 061a9a4..6f0226f 100644
--- a/Core/Src/stm32f1xx_it.c
+++ b/Core/Src/stm32f1xx_it.c
@@ -22,6 +22,7 @@
 #include "stm32f1xx_it.h"
 /* Private includes ----------------------------------------------------------*/
 /* USER CODE BEGIN Includes */
+#include "floppy.h"
 /* USER CODE END Includes */
 
 /* Private typedef -----------------------------------------------------------*/
@@ -56,6 +57,7 @@
 
 /* External variables --------------------------------------------------------*/
 extern PCD_HandleTypeDef hpcd_USB_FS;
+extern TIM_HandleTypeDef htim3;
 extern TIM_HandleTypeDef htim4;
 /* USER CODE BEGIN EV */
 
@@ -213,38 +215,39 @@ void USB_LP_CAN1_RX0_IRQHandler(void)
   /* USER CODE END USB_LP_CAN1_RX0_IRQn 1 */
 }
 
+/**
+  * @brief This function handles TIM3 global interrupt.
+  */
+void TIM3_IRQHandler(void)
+{
+  /* USER CODE BEGIN TIM3_IRQn 0 */
+    // вызываем функцию обработки мелодии
+    FloppyTrackTick();
+
+    // сброс всех флагов прерывания
+    TIM3->SR = 0;
+  /* USER CODE END TIM3_IRQn 0 */
+  /* USER CODE BEGIN TIM3_IRQn 1 */
+
+  /* USER CODE END TIM3_IRQn 1 */
+}
+
 /**
   * @brief This function handles TIM4 global interrupt.
   */
 void TIM4_IRQHandler(void)
 {
   /* USER CODE BEGIN TIM4_IRQn 0 */
-  TEST_GPIO_Port->ODR ^= TEST_Pin;
+    // дергаем ногу такта таймера (для отладки)
+    SOUND_TICK_GPIO_Port->ODR ^= SOUND_TICK_Pin;
 
-  static uint16_t cnt = 0;
-  cnt += 1;
-  if (cnt >= 50) { // тут менять частоту (делитель от 40к)
-      cnt = 0;
+    // вызываем тик у флоппи приводов
+    FloppySoundTickHandler();
 
-      // тик таймера, который для флоппи
-
-      static char t = 0;
-      static int curr_step = 0;
-      if (t) {
-          STEP1_GPIO_Port->ODR ^= STEP1_Pin;
-          curr_step++;
-      } else {
-          if (curr_step >= 80) {
-              curr_step = 0;
-              DIR1_GPIO_Port->ODR ^= DIR1_Pin;
-          }
-      }
-
-      t = !t;
-  }
+    // сброс всех флагов прерывания
+    TIM4->SR = 0;
 
   /* USER CODE END TIM4_IRQn 0 */
-  HAL_TIM_IRQHandler(&htim4);
   /* USER CODE BEGIN TIM4_IRQn 1 */
 
   /* USER CODE END TIM4_IRQn 1 */
diff --git a/Floppotron.ioc b/Floppotron.ioc
index 1d714d8..cac1957 100644
--- a/Floppotron.ioc
+++ b/Floppotron.ioc
@@ -10,25 +10,31 @@ Mcu.Family=STM32F1
 Mcu.IP0=NVIC
 Mcu.IP1=RCC
 Mcu.IP2=SYS
-Mcu.IP3=TIM4
-Mcu.IP4=USB
-Mcu.IP5=USB_DEVICE
-Mcu.IPNb=6
+Mcu.IP3=TIM3
+Mcu.IP4=TIM4
+Mcu.IP5=USB
+Mcu.IP6=USB_DEVICE
+Mcu.IPNb=7
 Mcu.Name=STM32F103C(8-B)Tx
 Mcu.Package=LQFP48
 Mcu.Pin0=PD0-OSC_IN
 Mcu.Pin1=PD1-OSC_OUT
-Mcu.Pin10=VP_TIM4_VS_ClockSourceINT
-Mcu.Pin11=VP_USB_DEVICE_VS_USB_DEVICE_CDC_FS
+Mcu.Pin10=PA12
+Mcu.Pin11=PA13
+Mcu.Pin12=PA14
+Mcu.Pin13=VP_SYS_VS_Systick
+Mcu.Pin14=VP_TIM3_VS_ClockSourceINT
+Mcu.Pin15=VP_TIM4_VS_ClockSourceINT
+Mcu.Pin16=VP_USB_DEVICE_VS_USB_DEVICE_CDC_FS
 Mcu.Pin2=PA0-WKUP
 Mcu.Pin3=PA1
 Mcu.Pin4=PA2
-Mcu.Pin5=PA11
-Mcu.Pin6=PA12
-Mcu.Pin7=PA13
-Mcu.Pin8=PA14
-Mcu.Pin9=VP_SYS_VS_Systick
-Mcu.PinsNb=12
+Mcu.Pin5=PA3
+Mcu.Pin6=PA4
+Mcu.Pin7=PA5
+Mcu.Pin8=PB11
+Mcu.Pin9=PA11
+Mcu.PinsNb=17
 Mcu.ThirdPartyNb=0
 Mcu.UserConstants=
 Mcu.UserName=STM32F103C8Tx
@@ -44,18 +50,23 @@ NVIC.PendSV_IRQn=true\:0\:0\:false\:false\:true\:false\:false\:false
 NVIC.PriorityGroup=NVIC_PRIORITYGROUP_4
 NVIC.SVCall_IRQn=true\:0\:0\:false\:false\:true\:false\:false\:false
 NVIC.SysTick_IRQn=true\:15\:0\:false\:false\:true\:false\:true\:false
-NVIC.TIM4_IRQn=true\:0\:0\:false\:false\:true\:true\:true\:true
+NVIC.TIM3_IRQn=true\:0\:0\:false\:false\:true\:true\:false\:true
+NVIC.TIM4_IRQn=true\:0\:0\:false\:false\:true\:true\:false\:true
 NVIC.USB_LP_CAN1_RX0_IRQn=true\:0\:0\:false\:false\:true\:false\:true\:true
 NVIC.UsageFault_IRQn=true\:0\:0\:false\:false\:true\:false\:false\:false
-PA0-WKUP.GPIOParameters=GPIO_Speed,GPIO_Label
-PA0-WKUP.GPIO_Label=STEP1
+PA0-WKUP.GPIOParameters=GPIO_Speed,PinState,GPIO_Label,GPIO_ModeDefaultOutputPP
+PA0-WKUP.GPIO_Label=DIR1
+PA0-WKUP.GPIO_ModeDefaultOutputPP=GPIO_MODE_OUTPUT_PP
 PA0-WKUP.GPIO_Speed=GPIO_SPEED_FREQ_HIGH
 PA0-WKUP.Locked=true
+PA0-WKUP.PinState=GPIO_PIN_RESET
 PA0-WKUP.Signal=GPIO_Output
-PA1.GPIOParameters=GPIO_Speed,GPIO_Label
-PA1.GPIO_Label=DIR1
+PA1.GPIOParameters=GPIO_Speed,PinState,GPIO_Label,GPIO_ModeDefaultOutputPP
+PA1.GPIO_Label=STEP1
+PA1.GPIO_ModeDefaultOutputPP=GPIO_MODE_OUTPUT_PP
 PA1.GPIO_Speed=GPIO_SPEED_FREQ_HIGH
 PA1.Locked=true
+PA1.PinState=GPIO_PIN_RESET
 PA1.Signal=GPIO_Output
 PA11.Mode=Device
 PA11.Signal=USB_DM
@@ -65,11 +76,41 @@ PA13.Mode=Serial_Wire
 PA13.Signal=SYS_JTMS-SWDIO
 PA14.Mode=Serial_Wire
 PA14.Signal=SYS_JTCK-SWCLK
-PA2.GPIOParameters=GPIO_Speed,GPIO_Label
-PA2.GPIO_Label=TEST
+PA2.GPIOParameters=GPIO_Speed,PinState,GPIO_Label,GPIO_ModeDefaultOutputPP
+PA2.GPIO_Label=SEL1
+PA2.GPIO_ModeDefaultOutputPP=GPIO_MODE_OUTPUT_PP
 PA2.GPIO_Speed=GPIO_SPEED_FREQ_HIGH
 PA2.Locked=true
+PA2.PinState=GPIO_PIN_RESET
 PA2.Signal=GPIO_Output
+PA3.GPIOParameters=GPIO_Speed,PinState,GPIO_Label,GPIO_ModeDefaultOutputPP
+PA3.GPIO_Label=DIR2
+PA3.GPIO_ModeDefaultOutputPP=GPIO_MODE_OUTPUT_PP
+PA3.GPIO_Speed=GPIO_SPEED_FREQ_HIGH
+PA3.Locked=true
+PA3.PinState=GPIO_PIN_RESET
+PA3.Signal=GPIO_Output
+PA4.GPIOParameters=GPIO_Speed,PinState,GPIO_Label,GPIO_ModeDefaultOutputPP
+PA4.GPIO_Label=STEP2
+PA4.GPIO_ModeDefaultOutputPP=GPIO_MODE_OUTPUT_PP
+PA4.GPIO_Speed=GPIO_SPEED_FREQ_HIGH
+PA4.Locked=true
+PA4.PinState=GPIO_PIN_RESET
+PA4.Signal=GPIO_Output
+PA5.GPIOParameters=GPIO_Speed,PinState,GPIO_Label,GPIO_ModeDefaultOutputPP
+PA5.GPIO_Label=SEL2
+PA5.GPIO_ModeDefaultOutputPP=GPIO_MODE_OUTPUT_PP
+PA5.GPIO_Speed=GPIO_SPEED_FREQ_HIGH
+PA5.Locked=true
+PA5.PinState=GPIO_PIN_RESET
+PA5.Signal=GPIO_Output
+PB11.GPIOParameters=GPIO_Speed,PinState,GPIO_Label,GPIO_ModeDefaultOutputPP
+PB11.GPIO_Label=SOUND_TICK
+PB11.GPIO_ModeDefaultOutputPP=GPIO_MODE_OUTPUT_PP
+PB11.GPIO_Speed=GPIO_SPEED_FREQ_HIGH
+PB11.Locked=true
+PB11.PinState=GPIO_PIN_RESET
+PB11.Signal=GPIO_Output
 PD0-OSC_IN.Mode=HSE-External-Oscillator
 PD0-OSC_IN.Signal=RCC_OSC_IN
 PD1-OSC_OUT.Mode=HSE-External-Oscillator
@@ -103,7 +144,7 @@ ProjectManager.StackSize=0x400
 ProjectManager.TargetToolchain=STM32CubeIDE
 ProjectManager.ToolChainLocation=
 ProjectManager.UnderRoot=true
-ProjectManager.functionlistsort=1-SystemClock_Config-RCC-false-HAL-false,2-MX_GPIO_Init-GPIO-false-HAL-true,3-MX_TIM4_Init-TIM4-false-HAL-true,4-MX_USB_DEVICE_Init-USB_DEVICE-false-HAL-false
+ProjectManager.functionlistsort=1-SystemClock_Config-RCC-false-HAL-false,2-MX_GPIO_Init-GPIO-false-HAL-true,3-MX_TIM4_Init-TIM4-false-HAL-true,4-MX_USB_DEVICE_Init-USB_DEVICE-false-HAL-false,5-MX_TIM3_Init-TIM3-false-HAL-true
 RCC.ADCFreqValue=36000000
 RCC.AHBFreq_Value=72000000
 RCC.APB1CLKDivider=RCC_HCLK_DIV2
@@ -125,6 +166,9 @@ RCC.TimSysFreq_Value=72000000
 RCC.USBFreq_Value=48000000
 RCC.USBPrescaler=RCC_USBCLKSOURCE_PLL_DIV1_5
 RCC.VCOOutput2Freq_Value=8000000
+TIM3.IPParameters=Prescaler,Period
+TIM3.Period=9999
+TIM3.Prescaler=71
 TIM4.IPParameters=Period
 TIM4.Period=3600
 USB_DEVICE.CLASS_NAME_FS=CDC
@@ -135,6 +179,8 @@ USB_DEVICE.VirtualMode=Cdc
 USB_DEVICE.VirtualModeFS=Cdc_FS
 VP_SYS_VS_Systick.Mode=SysTick
 VP_SYS_VS_Systick.Signal=SYS_VS_Systick
+VP_TIM3_VS_ClockSourceINT.Mode=Internal
+VP_TIM3_VS_ClockSourceINT.Signal=TIM3_VS_ClockSourceINT
 VP_TIM4_VS_ClockSourceINT.Mode=Internal
 VP_TIM4_VS_ClockSourceINT.Signal=TIM4_VS_ClockSourceINT
 VP_USB_DEVICE_VS_USB_DEVICE_CDC_FS.Mode=CDC_FS