// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************
RIOT 6532 emulation
***************************************************************************/
#pragma once
#ifndef __RIOT6532_H__
#define __RIOT6532_H__
#include "emu.h"
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_RIOT6532_IN_PA_CB(_devcb) \
devcb = &riot6532_device::set_in_pa_callback(*device, DEVCB_##_devcb);
#define MCFG_RIOT6532_OUT_PA_CB(_devcb) \
devcb = &riot6532_device::set_out_pa_callback(*device, DEVCB_##_devcb);
#define MCFG_RIOT6532_IN_PB_CB(_devcb) \
devcb = &riot6532_device::set_in_pb_callback(*device, DEVCB_##_devcb);
#define MCFG_RIOT6532_OUT_PB_CB(_devcb) \
devcb = &riot6532_device::set_out_pb_callback(*device, DEVCB_##_devcb);
#define MCFG_RIOT6532_IRQ_CB(_devcb) \
devcb = &riot6532_device::set_irq_callback(*device, DEVCB_##_devcb);
/***************************************************************************
TYPE DEFINITIONS
***************************************************************************/
// ======================> riot6532_device
class riot6532_device : public device_t
{
public:
// construction/destruction
riot6532_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
template<class _Object> static devcb_base &set_in_pa_callback(device_t &device, _Object object) { return downcast<riot6532_device &>(device).m_in_pa_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_pa_callback(device_t &device, _Object object) { return downcast<riot6532_device &>(device).m_out_pa_cb.set_callback(object); }
template<class _Object> static devcb_base &set_in_pb_callback(device_t &device, _Object object) { return downcast<riot6532_device &>(device).m_in_pb_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_pb_callback(device_t &device, _Object object) { return downcast<riot6532_device &>(device).m_out_pb_cb.set_callback(object); }
template<class _Object> static devcb_base &set_irq_callback(device_t &device, _Object object) { return downcast<riot6532_device &>(device).m_irq_cb.set_callback(object); }
DECLARE_READ8_MEMBER( read );
DECLARE_WRITE8_MEMBER( write );
UINT8 reg_r(UINT8 offset, bool debugger_access = false);
void reg_w(UINT8 offset, UINT8 data);
void porta_in_set(UINT8 data, UINT8 mask);
void portb_in_set(UINT8 data, UINT8 mask);
UINT8 porta_in_get();
UINT8 portb_in_get();
UINT8 porta_out_get();
UINT8 portb_out_get();
void timer_end();
protected:
class riot6532_port
{
public:
UINT8 m_in;
UINT8 m_out;
UINT8 m_ddr;
devcb_read8 *m_in_cb;
devcb_write8 *m_out_cb;
};
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
virtual void device_post_load() override { }
virtual void device_clock_changed() override { }
private:
void update_irqstate();
UINT8 apply_ddr(const riot6532_port *port);
void update_pa7_state();
UINT8 get_timer();
riot6532_port m_port[2];
devcb_read8 m_in_pa_cb;
devcb_write8 m_out_pa_cb;
devcb_read8 m_in_pb_cb;
devcb_write8 m_out_pb_cb;
devcb_write_line m_irq_cb;
UINT8 m_irqstate;
UINT8 m_irqenable;
int m_irq;
UINT8 m_pa7dir; /* 0x80 = high-to-low, 0x00 = low-to-high */
UINT8 m_pa7prev;
UINT8 m_timershift;
UINT8 m_timerstate;
emu_timer * m_timer;
enum
{
TIMER_END_CB
};
};
// device type definition
extern const device_type RIOT6532;
#endif