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-rw-r--r--src/mame/machine/x820kb.h87
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diff --git a/src/mame/machine/x820kb.h b/src/mame/machine/x820kb.h
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+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/**********************************************************************
+
+ Xerox 820/820-II ASCII keyboard emulation
+
+*********************************************************************/
+
+#pragma once
+
+#ifndef __XEROX_820_KEYBOARD__
+#define __XEROX_820_KEYBOARD__
+
+#include "emu.h"
+#include "cpu/mcs48/mcs48.h"
+
+
+
+//**************************************************************************
+// INTERFACE CONFIGURATION MACROS
+//**************************************************************************
+
+#define MCFG_XEROX_820_KEYBOARD_KBSTB_CALLBACK(_devcb) \
+ devcb = &xerox_820_keyboard_t::set_kbstb_wr_callback(*device, DEVCB_##_devcb);
+
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> xerox_820_keyboard_t
+
+class xerox_820_keyboard_t : public device_t
+{
+public:
+ // construction/destruction
+ xerox_820_keyboard_t(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ template<class _Object> static devcb_base &set_kbstb_wr_callback(device_t &device, _Object object) { return downcast<xerox_820_keyboard_t &>(device).m_kbstb_cb.set_callback(object); }
+
+ // optional information overrides
+ virtual const rom_entry *device_rom_region() const;
+ virtual machine_config_constructor device_mconfig_additions() const;
+ virtual ioport_constructor device_input_ports() const;
+
+ UINT8 read() { return m_bus; }
+
+ DECLARE_READ8_MEMBER( kb_p1_r );
+ DECLARE_WRITE8_MEMBER( kb_p1_w );
+ DECLARE_READ8_MEMBER( kb_p2_r );
+ DECLARE_READ8_MEMBER( kb_t0_r );
+ DECLARE_READ8_MEMBER( kb_t1_r );
+ DECLARE_WRITE8_MEMBER( kb_bus_w );
+
+protected:
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_reset();
+ virtual void device_reset_after_children();
+
+private:
+ required_device<cpu_device> m_maincpu;
+ required_ioport m_y0;
+ required_ioport m_y1;
+ required_ioport m_y2;
+ required_ioport m_y3;
+ required_ioport m_y4;
+ required_ioport m_y5;
+ required_ioport m_y6;
+ required_ioport m_y7;
+ required_ioport m_y8;
+ required_ioport m_yf;
+
+ devcb_write_line m_kbstb_cb;
+
+ UINT8 m_p1;
+ UINT8 m_bus;
+};
+
+
+// device type definition
+extern const device_type XEROX_820_KEYBOARD;
+
+
+
+#endif