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// license:BSD-3-Clause
// copyright-holders:Nigel Barnes
/**********************************************************************
Acorn Tube ULA emulation
**********************************************************************/
#ifndef MAME_MACHINE_TUBE_H
#define MAME_MACHINE_TUBE_H
#pragma once
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> tube_device
class tube_device : public device_t
{
public:
// construction/destruction
tube_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);
// callbacks
auto hirq_handler() { return m_hirq_handler.bind(); }
auto pnmi_handler() { return m_pnmi_handler.bind(); }
auto pirq_handler() { return m_pirq_handler.bind(); }
auto drq_handler() { return m_drq_handler.bind(); }
uint8_t host_r(offs_t offset);
void host_w(offs_t offset, uint8_t data);
uint8_t parasite_r(offs_t offset);
void parasite_w(offs_t offset, uint8_t data);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
private:
uint8_t m_ph1[24];
uint8_t m_ph2;
uint8_t m_ph3[2];
uint8_t m_ph4;
uint8_t m_hp1;
uint8_t m_hp2;
uint8_t m_hp3[2];
uint8_t m_hp4;
uint8_t m_hstat[4];
uint8_t m_pstat[4];
uint8_t m_r1stat;
int m_ph1pos;
int m_ph3pos;
int m_hp3pos;
void update_interrupts();
devcb_write_line m_hirq_handler;
devcb_write_line m_pnmi_handler;
devcb_write_line m_pirq_handler;
devcb_write_line m_drq_handler;
};
// device type definition
DECLARE_DEVICE_TYPE(TUBE, tube_device)
#endif // MAME_MACHINE_TUBE_H
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