Imported COM8116 DBRG from MESS. (no whatsnew)

.gitattributes

@@ -762,6 +762,8 @@ src/emu/machine/cdp1852.c svneol=native#text/plain
 src/emu/machine/cdp1852.h svneol=native#text/plain
 src/emu/machine/cdp1871.c svneol=native#text/plain
 src/emu/machine/cdp1871.h svneol=native#text/plain
+src/emu/machine/com8116.c svneol=native#text/plain
+src/emu/machine/com8116.h svneol=native#text/plain
 src/emu/machine/cr589.c svneol=native#text/plain
 src/emu/machine/cr589.h svneol=native#text/plain
 src/emu/machine/devhelpr.h svneol=native#text/plain

src/emu/emu.mak

@@ -158,6 +158,7 @@ EMUMACHINEOBJS = \
 	$(EMUMACHINE)/at28c16.o		\
 	$(EMUMACHINE)/cdp1852.o		\
 	$(EMUMACHINE)/cdp1871.o		\
+	$(EMUMACHINE)/com8116.o		\
 	$(EMUMACHINE)/cr589.o		\
 	$(EMUMACHINE)/ds1302.o		\
 	$(EMUMACHINE)/ds2401.o		\

src/emu/machine/com8116.c

@@ -0,0 +1,150 @@
+/**********************************************************************
+
+    COM8116 Dual Baud Rate Generator (Programmable Divider) emulation
+
+    Copyright MESS Team.
+    Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************/
+
+#include "emu.h"
+#include "com8116.h"
+#include "machine/devhelpr.h"
+
+
+
+//**************************************************************************
+//  MACROS / CONSTANTS
+//**************************************************************************
+
+#define LOG 0
+
+
+
+//**************************************************************************
+//  GLOBAL VARIABLES
+//**************************************************************************
+
+// devices
+const device_type COM8116 = com8116_device_config::static_alloc_device_config;
+
+
+
+//**************************************************************************
+//  DEVICE CONFIGURATION
+//**************************************************************************
+
+GENERIC_DEVICE_CONFIG_SETUP(com8116, "COM8116")
+
+
+//-------------------------------------------------
+//  device_config_complete - perform any
+//  operations now that the configuration is
+//  complete
+//-------------------------------------------------
+
+void com8116_device_config::device_config_complete()
+{
+	// inherit a copy of the static data
+	const com8116_interface *intf = reinterpret_cast<const com8116_interface *>(static_config());
+	if (intf != NULL)
+		*static_cast<com8116_interface *>(this) = *intf;
+
+	// or initialize to defaults if none provided
+	else
+	{
+		memset(&m_out_fx4_func, 0, sizeof(m_out_fx4_func));
+		memset(&m_out_fr_func, 0, sizeof(m_out_fr_func));
+		memset(&m_out_ft_func, 0, sizeof(m_out_ft_func));
+	}
+}
+
+
+
+//**************************************************************************
+//  LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+//  com8116_device - constructor
+//-------------------------------------------------
+
+com8116_device::com8116_device(running_machine &_machine, const com8116_device_config &config)
+    : device_t(_machine, config),
+      m_config(config)
+{
+}
+
+
+//-------------------------------------------------
+//  device_start - device-specific startup
+//-------------------------------------------------
+
+void com8116_device::device_start()
+{
+	// resolve callbacks
+	devcb_resolve_write_line(&m_out_fx4_func, &m_config.m_out_fx4_func, this);
+	devcb_resolve_write_line(&m_out_fr_func, &m_config.m_out_fr_func, this);
+	devcb_resolve_write_line(&m_out_ft_func, &m_config.m_out_ft_func, this);
+
+	// allocate timers
+	m_fx4_timer = timer_alloc(TIMER_FX4);
+	m_fx4_timer->adjust(attotime::zero, 0, attotime::from_hz(clock() / 4));
+	m_fr_timer = timer_alloc(TIMER_FR);
+	m_ft_timer = timer_alloc(TIMER_FT);
+
+	// register for state saving
+	save_item(NAME(m_fr));
+	save_item(NAME(m_ft));
+}
+
+
+//-------------------------------------------------
+//  device_timer - handler timer events
+//-------------------------------------------------
+
+void com8116_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
+{
+	switch (id)
+	{
+	case TIMER_FX4:
+		devcb_call_write_line(&m_out_fx4_func, 1);
+		break;
+
+	case TIMER_FR:
+		devcb_call_write_line(&m_out_fr_func, 1);
+		break;
+
+	case TIMER_FT:
+		devcb_call_write_line(&m_out_ft_func, 1);
+		break;
+	}
+}
+
+
+//-------------------------------------------------
+//  str_w - 
+//-------------------------------------------------
+
+WRITE8_MEMBER( com8116_device::str_w )
+{
+	if (LOG) logerror("COM8116 '%s' Receiver Divider %01x\n", tag(), data & 0x0f);
+
+	m_fr = data & 0x0f;
+
+	m_fr_timer->adjust(attotime::zero, 0, attotime::from_hz(clock() / m_config.m_fr_divisors[m_fr] / 2));
+}
+
+
+//-------------------------------------------------
+//  stt_w - 
+//-------------------------------------------------
+
+WRITE8_MEMBER( com8116_device::stt_w )
+{
+	if (LOG) logerror("COM8116 '%s' Transmitter Divider %01x\n", tag(), data & 0x0f);
+
+	m_ft = data & 0x0f;
+
+	m_ft_timer->adjust(attotime::zero, 0, attotime::from_hz(clock() / m_config.m_ft_divisors[m_ft] / 2));
+}

src/emu/machine/com8116.h

@@ -0,0 +1,132 @@
+/**********************************************************************
+
+    COM8116 Dual Baud Rate Generator (Programmable Divider) emulation
+
+    Copyright MESS Team.
+    Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************
+                            _____   _____
+             XTAL/EXT1   1 |*    \_/     | 18  XTAL/EXT2
+                   +5V   2 |             | 17  fT
+                    fR   3 |             | 16  Ta
+                    Ra   4 |   COM8116   | 15  Tb
+                    Rb   5 |   COM8116T  | 14  Tc
+                    Rc   6 |   COM8136   | 13  Td
+                    Rd   7 |   COM8136T  | 12  STT
+                   STR   8 |             | 11  GND
+                    NC   9 |_____________| 10  fX/4
+
+**********************************************************************/
+
+
+#pragma once
+
+#ifndef __COM8116__
+#define __COM8116__
+
+#include "emu.h"
+
+
+
+///*************************************************************************
+//  INTERFACE CONFIGURATION MACROS
+///*************************************************************************
+
+#define MCFG_COM8116_ADD(_tag, _clock, _config) \
+	MCFG_DEVICE_ADD(_tag, COM8116, _clock)	\
+	MCFG_DEVICE_CONFIG(_config)
+
+
+#define COM8116_INTERFACE(name) \
+	const com8116_interface (name) =
+
+
+
+///*************************************************************************
+//  TYPE DEFINITIONS
+///*************************************************************************
+
+// ======================> com8116_interface
+
+struct com8116_interface
+{
+	devcb_write_line		m_out_fx4_func;
+	devcb_write_line		m_out_fr_func;
+	devcb_write_line		m_out_ft_func;
+
+	// receiver divisor ROM (19-bit)
+	UINT32 m_fr_divisors[16];
+
+	// transmitter divisor ROM (19-bit)
+	UINT32 m_ft_divisors[16];
+};
+
+
+// ======================> com8116_device_config
+
+class com8116_device_config :   public device_config,
+                                public com8116_interface
+{
+    friend class com8116_device;
+
+    // construction/destruction
+    com8116_device_config(const machine_config &mconfig, const char *tag, const device_config *owner, UINT32 clock);
+
+public:
+    // allocators
+    static device_config *static_alloc_device_config(const machine_config &mconfig, const char *tag, const device_config *owner, UINT32 clock);
+    virtual device_t *alloc_device(running_machine &machine) const;
+
+protected:
+	// device_config overrides
+	virtual void device_config_complete();
+};
+
+
+
+// ======================> com8116_device
+
+class com8116_device :	public device_t
+{
+    friend class com8116_device_config;
+
+    // construction/destruction
+    com8116_device(running_machine &_machine, const com8116_device_config &_config);
+
+public:
+    DECLARE_WRITE8_MEMBER( str_w );
+    DECLARE_WRITE8_MEMBER( stt_w );
+
+protected:
+    // device-level overrides
+    virtual void device_start();
+	virtual void device_timer(emu_timer &timer, device_timer_id id, int m_param, void *ptr);
+
+private:
+	static const device_timer_id TIMER_FX4 = 0;
+	static const device_timer_id TIMER_FR = 1;
+	static const device_timer_id TIMER_FT = 2;
+
+	devcb_resolved_write_line	m_out_fx4_func;
+	devcb_resolved_write_line	m_out_fr_func;
+	devcb_resolved_write_line	m_out_ft_func;
+
+	int m_fr;						// receiver frequency
+	int m_ft;						// transmitter frequency
+
+	// timers
+	emu_timer *m_fx4_timer;
+	emu_timer *m_fr_timer;
+	emu_timer *m_ft_timer;
+
+	const com8116_device_config &m_config;
+};
+
+
+// device type definition
+extern const device_type COM8116;
+
+
+
+#endif