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/***************************************************************************
Sega 16-bit common hardware
****************************************************************************
Copyright Aaron Giles
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
* Neither the name 'MAME' nor the names of its contributors may be
used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY AARON GILES ''AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL AARON GILES BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
***************************************************************************/
#pragma once
#ifndef __SEGAIC16_H__
#define __SEGAIC16_H__
#include "cpu/m68000/m68000.h"
#include "machine/fd1089.h"
#include "machine/fd1094.h"
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_SEGA_315_5195_MAPPER_ADD(_tag, _cputag, _class, _mapper, _read, _write) \
MCFG_DEVICE_ADD(_tag, SEGA_315_5195_MEM_MAPPER, 0) \
sega_315_5195_mapper_device::static_set_cputag(*device, _cputag); \
sega_315_5195_mapper_device::static_set_mapper(*device, sega_315_5195_mapper_device::mapper_delegate(&_class::_mapper, #_class "::" #_mapper, NULL, (_class *)0)); \
sega_315_5195_mapper_device::static_set_sound_readwrite(*device, sega_315_5195_mapper_device::sound_read_delegate(&_class::_read, #_class "::" #_read, NULL, (_class *)0), sega_315_5195_mapper_device::sound_write_delegate(&_class::_write, #_class "::" #_write, NULL, (_class *)0)); \
#define MCFG_SEGA_315_5248_MULTIPLIER_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, SEGA_315_5248_MULTIPLIER, 0) \
#define MCFG_SEGA_315_5249_DIVIDER_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, SEGA_315_5249_DIVIDER, 0) \
#define MCFG_SEGA_315_5250_COMPARE_TIMER_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, SEGA_315_5250_COMPARE_TIMER, 0) \
#define MCFG_SEGA_315_5250_TIMER_ACK(_class, _func) \
sega_315_5250_compare_timer_device::static_set_timer_ack(*device, sega_315_5250_compare_timer_device::timer_ack_delegate(&_class::_func, #_class "::" #_func, NULL, (_class *)0)); \
#define MCFG_SEGA_315_5250_SOUND_WRITE(_class, _func) \
sega_315_5250_compare_timer_device::static_set_sound_write(*device, sega_315_5250_compare_timer_device::sound_write_delegate(&_class::_func, #_class "::" #_func, NULL, (_class *)0)); \
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> sega_315_5195_mapper_device
class sega_315_5195_mapper_device : public device_t
{
public:
typedef device_delegate<void (sega_315_5195_mapper_device &, UINT8)> mapper_delegate;
typedef device_delegate<UINT8 ()> sound_read_delegate;
typedef device_delegate<void (UINT8)> sound_write_delegate;
// construction/destruction
sega_315_5195_mapper_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// static configuration helpers
static void static_set_cputag(device_t &device, const char *cpu);
static void static_set_mapper(device_t &device, mapper_delegate callback);
static void static_set_sound_readwrite(device_t &device, sound_read_delegate read, sound_write_delegate write);
// public interface
DECLARE_READ8_MEMBER( read );
DECLARE_WRITE8_MEMBER( write );
// mapping helpers
void map_as_rom(UINT32 offset, UINT32 length, offs_t mirror, const char *bank_name, offs_t rgnoffset, write16_delegate whandler);
void map_as_ram(UINT32 offset, UINT32 length, offs_t mirror, const char *bank_share_name, write16_delegate whandler);
void map_as_handler(UINT32 offset, UINT32 length, offs_t mirror, read16_delegate rhandler, write16_delegate whandler);
// perform an explicit configuration (for bootlegs with hard-coded mappings)
void configure_explicit(const UINT8 *map_data);
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
private:
// internal region struct
struct region_info
{
offs_t size_mask;
offs_t base;
offs_t mirror;
offs_t start;
offs_t end;
};
// helper class for tracking banks mapped to ROM regions
class decrypt_bank
{
public:
// construction/destruction
decrypt_bank();
~decrypt_bank();
// configuration
void set_decrypt(fd1089_base_device *fd1089);
void set_decrypt(fd1094_device *fd1094);
void clear() { set(NULL, 0, 0, ~0, NULL); }
void set(memory_bank *bank, offs_t start, offs_t end, offs_t rgnoffs, UINT8 *src);
// updating
void update();
void reset() { m_fd1089_decrypted.reset(); if (m_fd1094_cache != NULL) m_fd1094_cache->reset(); }
private:
// internal state
memory_bank * m_bank;
offs_t m_start;
offs_t m_end;
offs_t m_rgnoffs;
UINT8 * m_srcptr;
fd1089_base_device * m_fd1089;
dynamic_array<UINT16> m_fd1089_decrypted;
fd1094_decryption_cache *m_fd1094_cache;
};
// internal helpers
void compute_region(region_info &info, UINT8 index, UINT32 length, UINT32 mirror, UINT32 offset = 0);
void update_mapping();
void fd1094_state_change(UINT8 state);
// configuration
const char * m_cputag;
mapper_delegate m_mapper;
sound_read_delegate m_sound_read;
sound_write_delegate m_sound_write;
// internal state
m68000_device * m_cpu;
address_space * m_space;
UINT8 m_regs[0x20];
UINT8 m_curregion;
decrypt_bank m_banks[8];
};
// ======================> sega_315_5248_multiplier_device
class sega_315_5248_multiplier_device : public device_t
{
public:
// construction/destruction
sega_315_5248_multiplier_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// public interface
DECLARE_READ16_MEMBER( read );
DECLARE_WRITE16_MEMBER( write );
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
private:
// internal state
UINT16 m_regs[4];
};
// ======================> sega_315_5249_divider_device
class sega_315_5249_divider_device : public device_t
{
public:
// construction/destruction
sega_315_5249_divider_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// public interface
DECLARE_READ16_MEMBER( read );
DECLARE_WRITE16_MEMBER( write );
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
private:
// internal helpers
void execute(int mode);
// internal state
UINT16 m_regs[8];
};
// ======================> sega_315_5250_compare_timer_device
class sega_315_5250_compare_timer_device : public device_t
{
public:
typedef device_delegate<void (UINT8)> sound_write_delegate;
typedef device_delegate<void ()> timer_ack_delegate;
// construction/destruction
sega_315_5250_compare_timer_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// static configuration helpers
static void static_set_timer_ack(device_t &device, timer_ack_delegate callback);
static void static_set_sound_write(device_t &device, sound_write_delegate write);
// public interface
bool clock();
DECLARE_READ16_MEMBER( read );
DECLARE_WRITE16_MEMBER( write );
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
private:
// internal helpers
void execute(bool update_history = false);
void interrupt_ack() { if (!m_timer_ack.isnull()) m_timer_ack(); }
// configuration
timer_ack_delegate m_timer_ack;
sound_write_delegate m_sound_write;
// internal state
UINT16 m_regs[16];
UINT16 m_counter;
UINT8 m_bit;
};
// device type definition
extern const device_type SEGA_315_5195_MEM_MAPPER;
extern const device_type SEGA_315_5248_MULTIPLIER;
extern const device_type SEGA_315_5249_DIVIDER;
extern const device_type SEGA_315_5250_COMPARE_TIMER;
/* open bus read helpers */
READ16_HANDLER( segaic16_open_bus_r );
#endif
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