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// license:BSD-3-Clause
// copyright-holders:AJR
/***************************************************************************
Xicor X2201 1024 x 1 bit Nonvolatile Static RAM
****************************************************************************
____ ____
A0 1 |* \_/ | 18 Vcc
A1 2 | | 17 A5
A2 3 | | 16 A6
A3 4 | | 15 A7
A4 5 | X2201 | 14 A8
DOut 6 | | 13 A9
/STORE 7 | | 12 DIn
/WE 8 | | 11 /ARRAY RECALL
GND 9 |___________| 10 /CS
***************************************************************************/
#ifndef MAME_MACHINE_X2201_H
#define MAME_MACHINE_X2201_H
#pragma once
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> x2201_device
class x2201_device : public device_t, public device_nvram_interface
{
public:
// construction/destruction
x2201_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0);
// read/write handlers
u8 read(offs_t offset);
u8 read_byte(offs_t offset); // hack
void write(offs_t offset, u8 data);
// control lines
DECLARE_WRITE_LINE_MEMBER(cs_w);
DECLARE_WRITE_LINE_MEMBER(array_recall_w);
DECLARE_WRITE_LINE_MEMBER(store_w);
protected:
// device-level overrides
virtual void device_start() override;
// device_nvram_interface overrides
virtual void nvram_default() override;
virtual void nvram_read(emu_file &file) override;
virtual void nvram_write(emu_file &file) override;
private:
// optional default data
optional_region_ptr<u8> m_default_data;
// memory arrays
std::unique_ptr<u8[]> m_ram;
std::unique_ptr<u8[]> m_eeprom;
// line state
bool m_cs;
bool m_store;
bool m_array_recall;
};
// device type definition
DECLARE_DEVICE_TYPE(X2201, x2201_device)
#endif // MAME_MACHINE_X2201_H
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