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Diffstat (limited to 'src/mame/machine/x820kb.h')
-rw-r--r-- | src/mame/machine/x820kb.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/src/mame/machine/x820kb.h b/src/mame/machine/x820kb.h new file mode 100644 index 00000000000..03a3054c486 --- /dev/null +++ b/src/mame/machine/x820kb.h @@ -0,0 +1,87 @@ +// 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 |