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diff --git a/src/mame/apple/rbv.h b/src/mame/apple/rbv.h
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+// license:BSD-3-Clause
+// copyright-holders:R. Belmont
+
+#ifndef MAME_APPLE_RBV_H
+#define MAME_APPLE_RBV_H
+
+#pragma once
+
+#include "machine/pseudovia.h"
+
+#include "screen.h"
+
+
+// ======================> rbv_device
+
+class rbv_device : public device_t, public device_palette_interface
+{
+public:
+ // construction/destruction
+ rbv_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
+
+ void map(address_map &map) ATTR_COLD;
+
+ void set_ram_info(u32 *ram, u32 size);
+
+ auto via6015_callback() { return write_6015.bind(); }
+ auto irq_callback() { return write_irq.bind(); }
+
+ template <u8 mask> void slot_irq_w(int state);
+ void asc_irq_w(int state);
+
+protected:
+ // device_t implementation
+ virtual void device_start() override ATTR_COLD;
+ virtual void device_reset() override ATTR_COLD;
+ virtual void device_add_mconfig(machine_config &config) override ATTR_COLD;
+ virtual ioport_constructor device_input_ports() const override ATTR_COLD;
+
+ // device_palette_interface implementation
+ u32 palette_entries() const noexcept override;
+
+private:
+ devcb_write_line write_6015, write_irq;
+
+ required_ioport m_io_montype;
+ required_device<screen_device> m_screen;
+ required_device<pseudovia_device> m_pseudovia;
+
+ emu_timer *m_6015_timer;
+
+ bool m_configured;
+ s32 m_hres, m_vres;
+ u8 m_montype;
+ bool m_monochrome;
+
+ u8 m_pal_address, m_pal_idx;
+ u32 *m_ram_ptr;
+ u32 m_ram_size;
+ u8 m_video_config;
+
+ u8 via2_video_config_r();
+ void via2_video_config_w(u8 data);
+ void via2_irq_w(int state);
+
+ TIMER_CALLBACK_MEMBER(mac_6015_tick);
+
+ u8 dac_r(offs_t offset);
+ void dac_w(offs_t offset, u8 data);
+
+ u32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
+ template <bool Mono> u32 update_screen(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
+};
+
+// device type definition
+DECLARE_DEVICE_TYPE(RBV, rbv_device)
+
+#endif // MAME_APPLE_RBV_H