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-rw-r--r--src/devices/machine/eeprom.h116
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diff --git a/src/devices/machine/eeprom.h b/src/devices/machine/eeprom.h
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+// license:BSD-3-Clause
+// copyright-holders:Aaron Giles
+/***************************************************************************
+
+ eeprom.h
+
+ Base class for EEPROM devices.
+
+***************************************************************************/
+
+#pragma once
+
+#ifndef __EEPROM_H__
+#define __EEPROM_H__
+
+
+
+//**************************************************************************
+// INTERFACE CONFIGURATION MACROS
+//**************************************************************************
+
+#define MCFG_EEPROM_SIZE(_cells, _cellbits) \
+ eeprom_base_device::static_set_size(*device, _cells, _cellbits);
+#define MCFG_EEPROM_DATA(_data, _size) \
+ eeprom_base_device::static_set_default_data(*device, _data, _size);
+#define MCFG_EEPROM_DEFAULT_VALUE(_value) \
+ eeprom_base_device::static_set_default_value(*device, _value);
+
+#define MCFG_EEPROM_WRITE_TIME(_value) \
+ eeprom_base_device::static_set_timing(*device, eeprom_base_device::WRITE_TIME, _value);
+#define MCFG_EEPROM_WRITE_ALL_TIME(_value) \
+ eeprom_base_device::static_set_timing(*device, eeprom_base_device::WRITE_ALL_TIME, _value);
+#define MCFG_EEPROM_ERASE_TIME(_value) \
+ eeprom_base_device::static_set_timing(*device, eeprom_base_device::ERASE_TIME, _value);
+#define MCFG_EEPROM_ERASE_ALL_TIME(_value) \
+ eeprom_base_device::static_set_timing(*device, eeprom_base_device::ERASE_ALL_TIME, _value);
+
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> eeprom_base_device
+
+class eeprom_base_device : public device_t,
+ public device_memory_interface,
+ public device_nvram_interface
+{
+protected:
+ // construction/destruction
+ eeprom_base_device(const machine_config &mconfig, device_type devtype, const char *name, const char *tag, device_t *owner, const char *shortname, const char *file);
+
+public:
+ // timing constants
+ enum timing_type
+ {
+ WRITE_TIME, // default = 2ms
+ WRITE_ALL_TIME, // default = 8ms
+ ERASE_TIME, // default = 1ms
+ ERASE_ALL_TIME, // default = 8ms
+ TIMING_COUNT
+ };
+
+ // inline configuration helpers
+ static void static_set_size(device_t &device, int cells, int cellbits);
+ static void static_set_default_data(device_t &device, const UINT8 *data, UINT32 size);
+ static void static_set_default_data(device_t &device, const UINT16 *data, UINT32 size);
+ static void static_set_default_value(device_t &device, UINT32 value);
+ static void static_set_timing(device_t &device, timing_type type, const attotime &duration);
+
+ // read/write/erase data
+ UINT32 read(offs_t address);
+ void write(offs_t address, UINT32 data);
+ void write_all(UINT32 data);
+ void erase(offs_t address);
+ void erase_all();
+
+ // status
+ bool ready() const { return machine().time() >= m_completion_time; }
+
+protected:
+ // device-level overrides
+ virtual void device_validity_check(validity_checker &valid) const;
+ virtual void device_start();
+ virtual void device_reset();
+
+ // 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);
+
+ // internal read/write without side-effects
+ UINT32 internal_read(offs_t address);
+ void internal_write(offs_t address, UINT32 data);
+
+ // configuration state
+ UINT32 m_cells;
+ UINT8 m_address_bits;
+ UINT8 m_data_bits;
+ address_space_config m_space_config;
+ generic_ptr m_default_data;
+ UINT32 m_default_data_size;
+ UINT32 m_default_value;
+ bool m_default_value_set;
+ attotime m_operation_time[TIMING_COUNT];
+
+ // live state
+ attotime m_completion_time;
+};
+
+
+#endif