/*************************************************************************** er2055.h GI 512 bit electrically alterable read-only memory. **************************************************************************** Copyright Aaron Giles All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name 'MAME' nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY AARON GILES ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL AARON GILES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ***************************************************************************/ #pragma once #ifndef __ER2055_H__ #define __ER2055_H__ //************************************************************************** // INTERFACE CONFIGURATION MACROS //************************************************************************** #define MCFG_ER2055_ADD(_tag) \ MCFG_DEVICE_ADD(_tag, ER2055, 0) //************************************************************************** // TYPE DEFINITIONS //************************************************************************** // ======================> er2055_device class er2055_device : public device_t, public device_memory_interface, public device_nvram_interface { public: // construction/destruction er2055_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); // I/O operations UINT8 data() const { return m_data; } void set_address(UINT8 address) { m_address = address & 0x3f; } void set_data(UINT8 data) { m_data = data; } // control lines -- all lines are specified as active-high (even CS2) void set_control(UINT8 cs1, UINT8 cs2, UINT8 c1, UINT8 c2, UINT8 ck); protected: // device-level overrides virtual void device_start(); // device_memory_interface overrides virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const; // device_nvram_interface overrides virtual void nvram_default(); virtual void nvram_read(emu_file &file); virtual void nvram_write(emu_file &file); static const int SIZE_DATA = 0x40; static const UINT8 CK = 0x01; static const UINT8 C1 = 0x02; static const UINT8 C2 = 0x04; static const UINT8 CS1 = 0x08; static const UINT8 CS2 = 0x10; // configuration state address_space_config m_space_config; // internal state UINT8 m_control_state; UINT8 m_address; UINT8 m_data; }; // device type definition extern const device_type ER2055; #endif