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diff --git a/src/mame/includes/poly880.h b/src/mame/includes/poly880.h
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+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+#pragma once
+
+#ifndef __POLY880__
+#define __POLY880__
+
+
+#include "emu.h"
+#include "cpu/z80/z80.h"
+#include "cpu/z80/z80daisy.h"
+#include "imagedev/cassette.h"
+#include "machine/z80pio.h"
+#include "machine/z80ctc.h"
+#include "machine/ram.h"
+
+#define SCREEN_TAG "screen"
+#define Z80_TAG "i1"
+#define Z80CTC_TAG "i4"
+#define Z80PIO1_TAG "i2"
+#define Z80PIO2_TAG "i3"
+
+class poly880_state : public driver_device
+{
+public:
+ poly880_state(const machine_config &mconfig, device_type type, const char *tag)
+ : driver_device(mconfig, type, tag),
+ m_maincpu(*this, Z80_TAG),
+ m_cassette(*this, "cassette"),
+ m_ki1(*this, "KI1"),
+ m_ki2(*this, "KI2"),
+ m_ki3(*this, "KI3")
+ { }
+
+ required_device<cpu_device> m_maincpu;
+ required_device<cassette_image_device> m_cassette;
+ required_ioport m_ki1;
+ required_ioport m_ki2;
+ required_ioport m_ki3;
+
+ virtual void machine_start();
+
+ DECLARE_WRITE8_MEMBER( cldig_w );
+ DECLARE_WRITE_LINE_MEMBER( ctc_z0_w );
+ DECLARE_WRITE_LINE_MEMBER( ctc_z1_w );
+ DECLARE_WRITE8_MEMBER( pio1_pa_w );
+ DECLARE_READ8_MEMBER( pio1_pb_r );
+ DECLARE_WRITE8_MEMBER( pio1_pb_w );
+ DECLARE_INPUT_CHANGED_MEMBER( trigger_reset );
+ DECLARE_INPUT_CHANGED_MEMBER( trigger_nmi );
+
+ void update_display();
+
+ /* display state */
+ UINT8 m_digit;
+ UINT8 m_segment;
+};
+
+#endif