diff --git a/src/mame/sharp/x1.h b/src/mame/sharp/x1.h
index 31bd1a98ed6..91c0b82831b 100644
--- a/src/mame/sharp/x1.h
+++ b/src/mame/sharp/x1.h
@@ -2,7 +2,7 @@
 // copyright-holders:Angelo Salese, Barry Rodewald
 /*****************************************************************************
  *
- * includes/x1.h
+ * sharp/x1.h
  *
  ****************************************************************************/
 
@@ -187,6 +187,7 @@ public:
 	void x1_mem(address_map &map);
 	void x1turbo_io_banks(address_map &map);
 	void x1turbo_mem(address_map &map);
+
 protected:
 	struct scrn_reg_t
 	{
@@ -250,7 +251,7 @@ protected:
 	turbo_reg_t m_turbo_reg;    /**< Turbo Z Video Registers. */
 	x1_rtc_t m_rtc;         /**< Struct for RTC related variables */
 	emu_timer *m_rtc_timer = nullptr;     /**< Pointer for RTC timer. */
-	emu_timer *m_motor_timer = nullptr;     /**< Pointer for RTC timer. */
+	emu_timer *m_motor_timer = nullptr;   /**< Pointer for FDC motor timer. */
 	uint8_t m_pcg_write_addr = 0;     /**< @todo Unused variable. */
 	uint8_t m_sub_cmd = 0;        /**< MCU side: current command issued from Main to Sub. */
 	uint8_t m_sub_cmd_length = 0;     /**< MCU side: number of parameters, in bytes. */
diff --git a/src/mame/sharp/x1twin.cpp b/src/mame/sharp/x1twin.cpp
index 80bed757305..c4088e30603 100644
--- a/src/mame/sharp/x1twin.cpp
+++ b/src/mame/sharp/x1twin.cpp
@@ -35,8 +35,8 @@ namespace {
 class x1twin_state : public x1_state
 {
 public:
-	x1twin_state(const machine_config &mconfig, device_type type, const char *tag)
-		: x1_state(mconfig, type, tag)
+	x1twin_state(const machine_config &mconfig, device_type type, const char *tag) :
+		x1_state(mconfig, type, tag)
 	{ }
 
 	void x1twin(machine_config &config);
@@ -483,8 +483,6 @@ void x1twin_state::x1twin(machine_config &config)
 	GFXDECODE(config, m_gfxdecode, m_palette, gfx_x1);
 
 	MB8877(config, m_fdc, MAIN_CLOCK / 16);
-	// TODO: guesswork, try to implicitly start the motor
-	m_fdc->hld_wr_callback().set(FUNC(x1_state::hdl_w));
 
 	FLOPPY_CONNECTOR(config, "fdc:0", x1_floppies, "dd", x1_state::floppy_formats);
 	FLOPPY_CONNECTOR(config, "fdc:1", x1_floppies, "dd", x1_state::floppy_formats);