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// license:BSD-3-Clause
// copyright-holders:Michael Zapf
/****************************************************************************
Intelligent peripheral bus controller (IBC)
This is a simple circuit used to connect to the Hexbus infrastructure.
See tp0370.cpp for documentation
Michael Zapf
*****************************************************************************/
#ifndef MAME_BUS_HEXBUS_TP0370_H
#define MAME_BUS_HEXBUS_TP0370_H
#pragma once
namespace bus { namespace hexbus {
class ibc_device : public device_t
{
public:
ibc_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
void device_start() override;
void device_reset() override;
DECLARE_READ8_MEMBER( read );
DECLARE_WRITE8_MEMBER( write );
template <class Object> static devcb_base &set_ibc_int_callback(device_t &device, Object &&cb) { return downcast<ibc_device &>(device).m_int.set_callback(std::forward<Object>(cb)); }
template <class Object> static devcb_base &set_hexbus_wr_callback(device_t &device, Object &&cb) { return downcast<ibc_device &>(device).m_hexout.set_callback(std::forward<Object>(cb)); }
template <class Object> static devcb_base &set_hsklatch_wr_callback(device_t &device, Object &&cb) { return downcast<ibc_device &>(device).m_latch.set_callback(std::forward<Object>(cb)); }
// INT line
devcb_write_line m_int;
// Outgoing connection to Hexbus
devcb_write8 m_hexout;
// Callback to set the HSK latch
devcb_write_line m_latch;
// Incoming connection
void from_hexbus(uint8_t val);
// Update the lines from the Hexbus
void update_lines(bool bav, bool hsk);
private:
bool m_inhibit;
bool m_disable;
bool m_bav;
bool m_hsk;
bool m_bavold;
bool m_hskold;
bool m_int_pending;
bool m_incoming_message;
bool m_message_started;
uint8_t m_data;
uint8_t m_transmit;
void set_disable_inhibit(bool dis, bool inh);
void set_lines(bool bav, bool hsk);
};
} }
/*
Links to outside
*/
#define MCFG_IBC_HEXBUS_OUT_CALLBACK(_write) \
ibc_device::set_hexbus_wr_callback(*device, DEVCB_##_write);
#define MCFG_IBC_HSKLATCH_CALLBACK(_write) \
ibc_device::set_hsklatch_wr_callback(*device, DEVCB_##_write);
#define MCFG_IBC_INT_CALLBACK(_write) \
ibc_device::set_ibc_int_callback(*device, DEVCB_##_write);
DECLARE_DEVICE_TYPE_NS(IBC, bus::hexbus, ibc_device)
#endif
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