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https://github.com/holub/mame
synced 2025-05-17 19:24:59 +03:00
Imported COM8116 DBRG from MESS. (no whatsnew)
This commit is contained in:
Curt Coder
parent
7ac5373f3c
commit
009a270864
2
.gitattributes
vendored
2
.gitattributes
vendored
@ -762,6 +762,8 @@ src/emu/machine/cdp1852.c svneol=native#text/plain
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src/emu/machine/cdp1852.h svneol=native#text/plain
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src/emu/machine/cdp1871.c svneol=native#text/plain
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src/emu/machine/cdp1871.h svneol=native#text/plain
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src/emu/machine/com8116.c svneol=native#text/plain
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src/emu/machine/com8116.h svneol=native#text/plain
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src/emu/machine/cr589.c svneol=native#text/plain
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src/emu/machine/cr589.h svneol=native#text/plain
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src/emu/machine/devhelpr.h svneol=native#text/plain
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@ -158,6 +158,7 @@ EMUMACHINEOBJS = \
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$(EMUMACHINE)/at28c16.o \
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$(EMUMACHINE)/cdp1852.o \
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$(EMUMACHINE)/cdp1871.o \
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$(EMUMACHINE)/com8116.o \
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$(EMUMACHINE)/cr589.o \
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$(EMUMACHINE)/ds1302.o \
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$(EMUMACHINE)/ds2401.o \
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150
src/emu/machine/com8116.c
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150
src/emu/machine/com8116.c
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@ -0,0 +1,150 @@
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/**********************************************************************
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COM8116 Dual Baud Rate Generator (Programmable Divider) emulation
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Copyright MESS Team.
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Visit http://mamedev.org for licensing and usage restrictions.
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**********************************************************************/
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#include "emu.h"
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#include "com8116.h"
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#include "machine/devhelpr.h"
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//**************************************************************************
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// MACROS / CONSTANTS
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//**************************************************************************
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#define LOG 0
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//**************************************************************************
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// GLOBAL VARIABLES
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//**************************************************************************
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// devices
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const device_type COM8116 = com8116_device_config::static_alloc_device_config;
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//**************************************************************************
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// DEVICE CONFIGURATION
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//**************************************************************************
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GENERIC_DEVICE_CONFIG_SETUP(com8116, "COM8116")
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//-------------------------------------------------
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// device_config_complete - perform any
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// operations now that the configuration is
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// complete
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//-------------------------------------------------
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void com8116_device_config::device_config_complete()
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{
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// inherit a copy of the static data
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const com8116_interface *intf = reinterpret_cast<const com8116_interface *>(static_config());
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if (intf != NULL)
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*static_cast<com8116_interface *>(this) = *intf;
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// or initialize to defaults if none provided
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else
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{
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memset(&m_out_fx4_func, 0, sizeof(m_out_fx4_func));
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memset(&m_out_fr_func, 0, sizeof(m_out_fr_func));
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memset(&m_out_ft_func, 0, sizeof(m_out_ft_func));
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}
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}
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//**************************************************************************
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// LIVE DEVICE
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//**************************************************************************
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//-------------------------------------------------
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// com8116_device - constructor
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//-------------------------------------------------
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com8116_device::com8116_device(running_machine &_machine, const com8116_device_config &config)
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: device_t(_machine, config),
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m_config(config)
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{
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}
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//-------------------------------------------------
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// device_start - device-specific startup
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//-------------------------------------------------
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void com8116_device::device_start()
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{
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// resolve callbacks
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devcb_resolve_write_line(&m_out_fx4_func, &m_config.m_out_fx4_func, this);
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devcb_resolve_write_line(&m_out_fr_func, &m_config.m_out_fr_func, this);
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devcb_resolve_write_line(&m_out_ft_func, &m_config.m_out_ft_func, this);
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// allocate timers
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m_fx4_timer = timer_alloc(TIMER_FX4);
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m_fx4_timer->adjust(attotime::zero, 0, attotime::from_hz(clock() / 4));
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m_fr_timer = timer_alloc(TIMER_FR);
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m_ft_timer = timer_alloc(TIMER_FT);
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// register for state saving
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save_item(NAME(m_fr));
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save_item(NAME(m_ft));
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}
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//-------------------------------------------------
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// device_timer - handler timer events
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//-------------------------------------------------
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void com8116_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
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{
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switch (id)
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{
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case TIMER_FX4:
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devcb_call_write_line(&m_out_fx4_func, 1);
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break;
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case TIMER_FR:
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devcb_call_write_line(&m_out_fr_func, 1);
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break;
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case TIMER_FT:
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devcb_call_write_line(&m_out_ft_func, 1);
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break;
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}
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}
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//-------------------------------------------------
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// str_w -
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//-------------------------------------------------
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WRITE8_MEMBER( com8116_device::str_w )
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{
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if (LOG) logerror("COM8116 '%s' Receiver Divider %01x\n", tag(), data & 0x0f);
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m_fr = data & 0x0f;
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m_fr_timer->adjust(attotime::zero, 0, attotime::from_hz(clock() / m_config.m_fr_divisors[m_fr] / 2));
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}
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//-------------------------------------------------
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// stt_w -
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//-------------------------------------------------
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WRITE8_MEMBER( com8116_device::stt_w )
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{
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if (LOG) logerror("COM8116 '%s' Transmitter Divider %01x\n", tag(), data & 0x0f);
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m_ft = data & 0x0f;
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m_ft_timer->adjust(attotime::zero, 0, attotime::from_hz(clock() / m_config.m_ft_divisors[m_ft] / 2));
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}
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132
src/emu/machine/com8116.h
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132
src/emu/machine/com8116.h
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@ -0,0 +1,132 @@
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/**********************************************************************
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COM8116 Dual Baud Rate Generator (Programmable Divider) emulation
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Copyright MESS Team.
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Visit http://mamedev.org for licensing and usage restrictions.
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**********************************************************************
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_____ _____
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XTAL/EXT1 1 |* \_/ | 18 XTAL/EXT2
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+5V 2 | | 17 fT
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fR 3 | | 16 Ta
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Ra 4 | COM8116 | 15 Tb
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Rb 5 | COM8116T | 14 Tc
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Rc 6 | COM8136 | 13 Td
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Rd 7 | COM8136T | 12 STT
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STR 8 | | 11 GND
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NC 9 |_____________| 10 fX/4
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**********************************************************************/
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#pragma once
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#ifndef __COM8116__
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#define __COM8116__
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#include "emu.h"
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///*************************************************************************
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// INTERFACE CONFIGURATION MACROS
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///*************************************************************************
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#define MCFG_COM8116_ADD(_tag, _clock, _config) \
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MCFG_DEVICE_ADD(_tag, COM8116, _clock) \
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MCFG_DEVICE_CONFIG(_config)
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#define COM8116_INTERFACE(name) \
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const com8116_interface (name) =
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///*************************************************************************
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// TYPE DEFINITIONS
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///*************************************************************************
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// ======================> com8116_interface
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struct com8116_interface
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{
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devcb_write_line m_out_fx4_func;
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devcb_write_line m_out_fr_func;
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devcb_write_line m_out_ft_func;
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// receiver divisor ROM (19-bit)
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UINT32 m_fr_divisors[16];
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// transmitter divisor ROM (19-bit)
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UINT32 m_ft_divisors[16];
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};
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// ======================> com8116_device_config
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class com8116_device_config : public device_config,
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public com8116_interface
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{
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friend class com8116_device;
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// construction/destruction
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com8116_device_config(const machine_config &mconfig, const char *tag, const device_config *owner, UINT32 clock);
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public:
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// allocators
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static device_config *static_alloc_device_config(const machine_config &mconfig, const char *tag, const device_config *owner, UINT32 clock);
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virtual device_t *alloc_device(running_machine &machine) const;
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protected:
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// device_config overrides
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virtual void device_config_complete();
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};
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// ======================> com8116_device
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class com8116_device : public device_t
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{
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friend class com8116_device_config;
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// construction/destruction
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com8116_device(running_machine &_machine, const com8116_device_config &_config);
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public:
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DECLARE_WRITE8_MEMBER( str_w );
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DECLARE_WRITE8_MEMBER( stt_w );
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protected:
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// device-level overrides
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virtual void device_start();
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virtual void device_timer(emu_timer &timer, device_timer_id id, int m_param, void *ptr);
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private:
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static const device_timer_id TIMER_FX4 = 0;
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static const device_timer_id TIMER_FR = 1;
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static const device_timer_id TIMER_FT = 2;
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devcb_resolved_write_line m_out_fx4_func;
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devcb_resolved_write_line m_out_fr_func;
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devcb_resolved_write_line m_out_ft_func;
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int m_fr; // receiver frequency
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int m_ft; // transmitter frequency
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// timers
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emu_timer *m_fx4_timer;
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emu_timer *m_fr_timer;
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emu_timer *m_ft_timer;
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const com8116_device_config &m_config;
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};
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// device type definition
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extern const device_type COM8116;
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#endif
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