More meat to SCI

src/devices/cpu/sh2/sh7604_bus.cpp

@@ -7,7 +7,6 @@
   Lies at 0xffffffe0-0xffffffff
   
   
-  
   TODO:
   - Host CPU setter (is_slave and clock are needed);
   - timer clock emulation;

src/devices/cpu/sh2/sh7604_bus.h

@@ -1,8 +1,8 @@
 // license:BSD-3-Clause
-// copyright-holders:<author_name>
+// copyright-holders:Angelo Salese
 /***************************************************************************
 
-Template for skeleton device
+  SH7604 BUS Controller
 
 ***************************************************************************/
 

src/devices/cpu/sh2/sh7604_sci.cpp

@@ -1,8 +1,14 @@
 // license:BSD-3-Clause
-// copyright-holders:<author_name>
+// copyright-holders:Angelo Salese
 /***************************************************************************
 
-Template for skeleton device
+  SH7604 SCI Controller
+
+   Lies at 0xfffffe00-0xfffffe0f
+
+  TODO:
+  - diserial;
+  - CPU callbacks for RX and TX;
 
 ***************************************************************************/
 
@@ -23,8 +29,83 @@ const device_type SH7604_SCI = &device_creator<sh7604_sci_device>;
 //  LIVE DEVICE
 //**************************************************************************
 
-static ADDRESS_MAP_START( sci_regs, AS_0, 8, sh7604_sci_device )
+READ8_MEMBER(sh7604_sci_device::serial_mode_r)
+{
+	return m_smr;
+}
 
+WRITE8_MEMBER(sh7604_sci_device::serial_mode_w)
+{
+	m_smr = data;
+	
+	logerror("%s: serial mode set:\n",tag());
+	logerror("\tCommunication Mode: %s mode\n",data & 0x80 ? "clocked synchronous" : "asynchronous");
+	logerror("\tCharacter Length: %s mode\n",data & 0x40 ? "7-bit" : "8-bit");
+	logerror("\tParity Enable: %s\n",data & 0x20 ? "yes" : "no");
+	logerror("\tParity Mode: %s\n",data & 0x10 ? "Odd" : "Even");
+	logerror("\tStop bits: %s\n",data & 0x08 ? "2" : "1");
+	logerror("\tMultiprocessor mode: %s\n",data & 0x04 ? "yes" : "no");
+	logerror("\tClock select: clock/%d\n",4 << ((data & 0x03)*2));
+}
+
+READ8_MEMBER(sh7604_sci_device::serial_control_r)
+{
+	return m_scr;
+}
+
+WRITE8_MEMBER(sh7604_sci_device::serial_control_w)
+{
+	m_scr = data;
+	
+	if(data & 0x30)
+		throw emu_fatalerror("%s: enabled serial control %02x\n", tag(),data);
+}
+
+READ8_MEMBER(sh7604_sci_device::serial_status_r)
+{
+	return m_ssr;
+}
+
+WRITE8_MEMBER(sh7604_sci_device::serial_ack_w)
+{
+	// TODO: verify this
+	m_ssr = (m_ssr & 0x06) | (m_ssr & data & 0xf9);
+}
+
+READ8_MEMBER(sh7604_sci_device::bitrate_r )
+{
+	return m_brr;
+}
+
+WRITE8_MEMBER(sh7604_sci_device::bitrate_w )
+{
+	m_brr = data;
+}
+
+READ8_MEMBER(sh7604_sci_device::transmit_data_r)
+{
+	// ...
+	return 0;
+}
+
+WRITE8_MEMBER(sh7604_sci_device::transmit_data_w)
+{
+	// ...
+}
+
+READ8_MEMBER(sh7604_sci_device::receive_data_r)
+{
+	// ...
+	return 0;
+}
+
+static ADDRESS_MAP_START( sci_regs, AS_0, 8, sh7604_sci_device )
+	AM_RANGE(0x00, 0x00) AM_READWRITE(serial_mode_r,   serial_mode_w)
+	AM_RANGE(0x01, 0x01) AM_READWRITE(bitrate_r,       bitrate_w)
+	AM_RANGE(0x02, 0x02) AM_READWRITE(serial_control_r,serial_control_w)
+	AM_RANGE(0x03, 0x03) AM_READWRITE(transmit_data_r, transmit_data_w)
+	AM_RANGE(0x04, 0x04) AM_READWRITE(serial_status_r, serial_ack_w)
+	AM_RANGE(0x05, 0x05) AM_READ(receive_data_r)
 ADDRESS_MAP_END
 
 //-------------------------------------------------
@@ -60,6 +141,10 @@ void sh7604_sci_device::device_start()
 
 void sh7604_sci_device::device_reset()
 {
+	m_smr = 0;
+	m_scr = 0;
+	m_ssr = STATUS_TDRE|STATUS_TEND; //0x84;
+	m_brr = 0xff;
 }
 
 

src/devices/cpu/sh2/sh7604_sci.h

@@ -1,8 +1,8 @@
 // license:BSD-3-Clause
-// copyright-holders:<author_name>
+// copyright-holders:Angelo Salese
 /***************************************************************************
 
-Template for skeleton device
+  SH7604 SCI Controller
 
 ***************************************************************************/
 
@@ -11,6 +11,17 @@ Template for skeleton device
 #ifndef __SH7604_SCIDEV_H__
 #define __SH7604_SCIDEV_H__
 
+enum {
+	STATUS_MPBT = 1 << 0,
+	STATUS_MPB =  1 << 1,
+	STATUS_TEND = 1 << 2,
+	STATUS_PER =  1 << 3,
+	STATUS_FER =  1 << 4,
+	STATUS_ORER = 1 << 5,
+	STATUS_RDRF = 1 << 6,
+	STATUS_TDRE = 1 << 7
+};
+
 
 
 //**************************************************************************
@@ -37,6 +48,19 @@ public:
 	DECLARE_WRITE8_MEMBER( write );
 	DECLARE_READ8_MEMBER( read );
 	
+	DECLARE_READ8_MEMBER( serial_mode_r );
+	DECLARE_WRITE8_MEMBER( serial_mode_w );
+	DECLARE_READ8_MEMBER( bitrate_r );
+	DECLARE_WRITE8_MEMBER( bitrate_w );
+	DECLARE_READ8_MEMBER( serial_control_r );
+	DECLARE_WRITE8_MEMBER( serial_control_w );
+
+	DECLARE_READ8_MEMBER( transmit_data_r );
+	DECLARE_WRITE8_MEMBER( transmit_data_w );
+	DECLARE_READ8_MEMBER( serial_status_r );
+	DECLARE_WRITE8_MEMBER( serial_ack_w );
+	DECLARE_READ8_MEMBER( receive_data_r );
+
 	virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const override;
 protected:
 	// device-level overrides
@@ -45,6 +69,10 @@ protected:
 	virtual void device_reset() override;
 private:
 	const address_space_config      m_space_config;
+	UINT8 m_smr;
+	UINT8 m_scr;
+	UINT8 m_ssr;
+	UINT8 m_brr;
 };