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-rw-r--r--src/devices/bus/pc98_cbus/amd98.h59
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diff --git a/src/devices/bus/pc98_cbus/amd98.h b/src/devices/bus/pc98_cbus/amd98.h
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+// license:BSD-3-Clause
+// copyright-holders:Angelo Salese
+/***************************************************************************
+
+ System Sacom AMD-98 (AmuseMent boarD)
+
+***************************************************************************/
+
+#ifndef MAME_BUS_PC98_CBUS_AMD98_H
+#define MAME_BUS_PC98_CBUS_AMD98_H
+
+#pragma once
+
+#include "slot.h"
+#include "sound/ay8910.h"
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> amd98_device
+
+class amd98_device : public device_t
+{
+public:
+ // construction/destruction
+ amd98_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+ static constexpr feature_type imperfect_features() { return feature::SOUND; }
+
+ uint8_t read(offs_t offset);
+ void write(offs_t offset, uint8_t data);
+
+protected:
+ // device-level overrides
+ virtual void device_validity_check(validity_checker &valid) const override;
+ virtual void device_start() override ATTR_COLD;
+ virtual void device_reset() override ATTR_COLD;
+ // optional information overrides
+ virtual void device_add_mconfig(machine_config &config) override ATTR_COLD;
+ virtual ioport_constructor device_input_ports() const override ATTR_COLD;
+
+private:
+ void ay3_address_w(uint8_t data);
+ void ay3_data_latch_w(uint8_t data);
+
+ uint8_t m_ay3_latch, m_ay3_ff;
+
+ required_device<pc98_cbus_slot_device> m_bus;
+ required_device<ay8910_device> m_ay1;
+ required_device<ay8910_device> m_ay2;
+ required_device<ay8910_device> m_ay3;
+
+};
+
+// device type definition
+DECLARE_DEVICE_TYPE(AMD98, amd98_device)
+
+#endif // MAME_BUS_PC98_CBUS_AMD98_H