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// license:BSD-3-Clause
// copyright-holders:smf
/*
* PlayStation Root Counter emulator
*
* Copyright 2003-2011 smf
*
*/
#ifndef MAME_CPU_PSX_RCNT_H
#define MAME_CPU_PSX_RCNT_H
#pragma once
DECLARE_DEVICE_TYPE(PSX_RCNT, psxrcnt_device)
#define MCFG_PSX_RCNT_IRQ0_HANDLER(_devcb) \
downcast<psxrcnt_device &>(*device).set_irq0_handler(DEVCB_##_devcb);
#define MCFG_PSX_RCNT_IRQ1_HANDLER(_devcb) \
downcast<psxrcnt_device &>(*device).set_irq1_handler(DEVCB_##_devcb);
#define MCFG_PSX_RCNT_IRQ2_HANDLER(_devcb) \
downcast<psxrcnt_device &>(*device).set_irq2_handler(DEVCB_##_devcb);
#define PSX_RC_STOP ( 0x01 )
#define PSX_RC_RESET ( 0x04 ) /* guess */
#define PSX_RC_COUNTTARGET ( 0x08 )
#define PSX_RC_IRQTARGET ( 0x10 )
#define PSX_RC_IRQOVERFLOW ( 0x20 )
#define PSX_RC_REPEAT ( 0x40 )
#define PSX_RC_CLC ( 0x100 )
#define PSX_RC_DIV ( 0x200 )
class psxrcnt_device : public device_t
{
public:
psxrcnt_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
// configuration helpers
template <class Object> devcb_base &set_irq0_handler(Object &&cb) { return m_irq0_handler.set_callback(std::forward<Object>(cb)); }
template <class Object> devcb_base &set_irq1_handler(Object &&cb) { return m_irq1_handler.set_callback(std::forward<Object>(cb)); }
template <class Object> devcb_base &set_irq2_handler(Object &&cb) { return m_irq2_handler.set_callback(std::forward<Object>(cb)); }
DECLARE_WRITE32_MEMBER( write );
DECLARE_READ32_MEMBER( read );
protected:
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_post_load() override;
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
private:
struct psx_root
{
emu_timer *timer;
uint16_t n_count;
uint16_t n_mode;
uint16_t n_target;
uint64_t n_start;
};
psx_root root_counter[ 3 ];
uint64_t gettotalcycles( void );
int root_divider( int n_counter );
uint16_t root_current( int n_counter );
int root_target( int n_counter );
void root_timer_adjust( int n_counter );
devcb_write_line m_irq0_handler;
devcb_write_line m_irq1_handler;
devcb_write_line m_irq2_handler;
};
#endif // MAME_CPU_PSX_RCNT_H
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