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// license:BSD-3-Clause
// copyright-holders:AJR
/**********************************************************************
Adaptec AIC-565 Bus Auxiliary Interface Chip
**********************************************************************/
#ifndef MAME_MACHINE_AIC565_H
#define MAME_MACHINE_AIC565_H
#pragma once
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> aic565_device
class aic565_device : public device_t
{
public:
// construction/destruction
aic565_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0);
// callback configuration
auto hrst_callback() { return m_hrst_callback.bind(); }
auto srst_callback() { return m_srst_callback.bind(); }
auto irq_callback() { return m_irq_callback.bind(); }
// host register access
u8 host_r(offs_t offset);
void host_w(offs_t offset, u8 data);
// local CPU access
u8 local_r(offs_t offset);
void local_w(offs_t offset, u8 data);
protected:
// device-level overrides
virtual void device_resolve_objects() override;
virtual void device_start() override;
virtual void device_reset() override;
private:
// synchronization helpers
TIMER_CALLBACK_MEMBER(host_sync_w);
TIMER_CALLBACK_MEMBER(local_sync_w);
// callback objects
devcb_write_line m_hrst_callback;
devcb_write_line m_srst_callback;
devcb_write_line m_irq_callback;
// internal state
uint8_t m_data_to_host;
uint8_t m_data_from_host;
uint8_t m_local_status;
uint8_t m_aux_status;
uint8_t m_interrupt_flags;
};
// device type declaration
DECLARE_DEVICE_TYPE(AIC565, aic565_device)
#endif // MAME_MACHINE_AIC565_H
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