// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************
Sega 16-bit common hardware
***************************************************************************/
#ifndef MAME_MACHINE_SEGAIC16_H
#define MAME_MACHINE_SEGAIC16_H
#pragma once
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> 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, u32 clock);
// public interface
u16 read(offs_t offset);
void write(offs_t offset, u16 data, u16 mem_mask = ~0);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
private:
// internal state
u16 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, u32 clock);
// public interface
u16 read(offs_t offset);
void write(offs_t offset, u16 data, u16 mem_mask = ~0);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
private:
// internal helpers
void execute(int mode);
// internal state
u16 m_regs[8];
};
// ======================> sega_315_5250_compare_timer_device
class sega_315_5250_compare_timer_device : public device_t
{
public:
// construction/destruction
sega_315_5250_compare_timer_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
// configuration helpers
auto m68kint_callback() { return m_68kint_callback.bind(); }
auto zint_callback() { return m_zint_callback.bind(); }
// public interface
DECLARE_WRITE_LINE_MEMBER(exck_w);
u16 read(offs_t offset);
void write(offs_t offset, u16 data, u16 mem_mask = ~0);
u8 zread();
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
private:
// internal helpers
void execute(bool update_history = false);
void interrupt_ack();
TIMER_CALLBACK_MEMBER(write_to_sound);
// configuration
devcb_write_line m_68kint_callback;
devcb_write_line m_zint_callback;
// internal state
u16 m_regs[16];
u16 m_counter;
u8 m_bit;
bool m_exck;
};
// device type definition
DECLARE_DEVICE_TYPE(SEGA_315_5248_MULTIPLIER, sega_315_5248_multiplier_device)
DECLARE_DEVICE_TYPE(SEGA_315_5249_DIVIDER, sega_315_5249_divider_device)
DECLARE_DEVICE_TYPE(SEGA_315_5250_COMPARE_TIMER, sega_315_5250_compare_timer_device)
#endif // MAME_MACHINE_SEGAIC16_H