h83337: add readback of wscr and stcr

src/devices/cpu/h8/h83217.cpp

@@ -88,6 +88,9 @@ void h83217_device::map(address_map &map)
 
 	map(0xffaa, 0xffab).rw(m_watchdog, FUNC(h8_watchdog_device::wd_r), FUNC(h8_watchdog_device::wd_w));
 
+	map(0xffac, 0xffac).rw(m_port[0], FUNC(h8_port_device::pcr_r), FUNC(h8_port_device::pcr_w));
+	map(0xffad, 0xffad).rw(m_port[1], FUNC(h8_port_device::pcr_r), FUNC(h8_port_device::pcr_w));
+	map(0xffae, 0xffae).rw(m_port[2], FUNC(h8_port_device::pcr_r), FUNC(h8_port_device::pcr_w));
 	map(0xffb0, 0xffb0).w(m_port[0], FUNC(h8_port_device::ddr_w));
 	map(0xffb1, 0xffb1).w(m_port[1], FUNC(h8_port_device::ddr_w));
 	map(0xffb2, 0xffb2).rw(m_port[0], FUNC(h8_port_device::port_r), FUNC(h8_port_device::dr_w));

src/devices/cpu/h8/h83337.cpp

@@ -8,7 +8,11 @@
 
     TODO:
     - 16-bit timer module is different from how it's implemented in h8_timer16.cpp
+    - PWM timer module
+    - Host Interface module
     - finish WSCR emulation, CKDBL flag would need support in peripherals
+    - finish STCR emulation
+    - finish SYSCR emulation
 
 ***************************************************************************/
 
@@ -38,7 +42,6 @@ h83337_device::h83337_device(const machine_config &mconfig, device_type type, co
 	m_timer16(*this, "timer16"),
 	m_timer16_0(*this, "timer16:0"),
 	m_watchdog(*this, "watchdog"),
-	m_syscr(0),
 	m_ram_start(start)
 {
 }
@@ -193,12 +196,22 @@ void h83337_device::internal_update(u64 current_time)
 void h83337_device::device_start()
 {
 	h8_device::device_start();
+
+	m_wscr = 0;
+	m_stcr = 0;
+	m_syscr = 0;
+
+	save_item(NAME(m_wscr));
+	save_item(NAME(m_stcr));
 	save_item(NAME(m_syscr));
 }
 
 void h83337_device::device_reset()
 {
 	h8_device::device_reset();
+
+	m_wscr = 0x08;
+	m_stcr = 0x00;
 	m_syscr = 0x09;
 }
 
@@ -209,30 +222,35 @@ u8 h83337_device::syscr_r()
 
 void h83337_device::syscr_w(u8 data)
 {
-	m_syscr = data;
 	logerror("syscr = %02x\n", data);
+	m_syscr = (m_syscr & 0x08) | (data & 0xf7);
 }
 
 u8 h83337_device::wscr_r()
 {
-	return 0x00;
+	return m_wscr;
 }
 
 void h83337_device::wscr_w(u8 data)
 {
 	logerror("wscr = %02x\n", data);
+	m_wscr = data;
 }
 
 u8 h83337_device::stcr_r()
 {
-	return 0x00;
+	return m_stcr;
 }
 
 void h83337_device::stcr_w(u8 data)
 {
 	logerror("stcr = %02x\n", data);
+
+	// ICKS0/1
 	m_timer8_0->set_extra_clock_bit(BIT(data, 0));
 	m_timer8_1->set_extra_clock_bit(BIT(data, 1));
+
+	m_stcr = data;
 }
 
 u8 h83337_device::mdcr_r()

src/devices/cpu/h8/h83337.h

@@ -83,8 +83,10 @@ protected:
 	required_device<h8_timer16_channel_device> m_timer16_0;
 	required_device<h8_watchdog_device> m_watchdog;
 
-	u8 m_syscr;
 	u32 m_ram_start;
+	u8 m_wscr;
+	u8 m_stcr;
+	u8 m_syscr;
 
 	virtual void update_irq_filter() override;
 	virtual void interrupt_taken() override;