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diff --git a/src/devices/bus/cbus/pc9801_86.h b/src/devices/bus/cbus/pc9801_86.h
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+// license:BSD-3-Clause
+// copyright-holders:Angelo Salese
+/***************************************************************************
+
+ NEC PC-9801-86
+
+***************************************************************************/
+
+#ifndef MAME_BUS_CBUS_PC9801_86_H
+#define MAME_BUS_CBUS_PC9801_86_H
+
+#pragma once
+
+
+#include "machine/pic8259.h"
+#include "sound/2608intf.h"
+#include "sound/dac.h"
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> pc9801_86_device
+
+class pc9801_86_device : public device_t
+{
+public:
+ // construction/destruction
+ pc9801_86_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+ DECLARE_READ8_MEMBER(opn_r);
+ DECLARE_WRITE8_MEMBER(opn_w);
+ DECLARE_READ8_MEMBER(id_r);
+ DECLARE_WRITE8_MEMBER(mask_w);
+ DECLARE_READ8_MEMBER(pcm_r);
+ DECLARE_WRITE8_MEMBER(pcm_w);
+
+protected:
+ // device-level overrides
+ virtual void device_validity_check(validity_checker &valid) const override;
+ virtual void device_start() override;
+ virtual void device_reset() override;
+ // optional information overrides
+ virtual void device_add_mconfig(machine_config &config) override;
+ virtual ioport_constructor device_input_ports() const override;
+ virtual const tiny_rom_entry *device_rom_region() const override;
+ void install_device(offs_t start, offs_t end, read8_delegate rhandler, write8_delegate whandler);
+ virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
+
+private:
+ int queue_count();
+ uint8_t queue_pop();
+
+ uint8_t m_joy_sel, m_mask, m_pcm_mode, m_vol[7], m_pcm_ctrl, m_pcm_mute;
+ uint16_t m_head, m_tail, m_count, m_irq_rate;
+ bool m_pcmirq, m_fmirq;
+ required_device<ym2608_device> m_opna;
+ required_device<dac_word_interface> m_ldac;
+ required_device<dac_word_interface> m_rdac;
+ std::vector<uint8_t> m_queue;
+ emu_timer *m_dac_timer;
+
+ DECLARE_WRITE_LINE_MEMBER(sound_irq);
+ DECLARE_READ8_MEMBER(opn_porta_r);
+ DECLARE_WRITE8_MEMBER(opn_portb_w);
+};
+
+
+// device type definition
+DECLARE_DEVICE_TYPE(PC9801_86, pc9801_86_device)
+
+
+
+//**************************************************************************
+// GLOBAL VARIABLES
+//**************************************************************************
+
+
+
+#endif // MAME_BUS_CBUS_PC9801_86_H