// license:BSD-3-Clause // copyright-holders:R. Belmont /********************************************************************* a2memexp.h Implementation of the Apple II Memory Expansion Card *********************************************************************/ #ifndef MAME_BUS_A2BUS_A2MEMEXP_H #define MAME_BUS_A2BUS_A2MEMEXP_H #pragma once #include "a2bus.h" //************************************************************************** // TYPE DEFINITIONS //************************************************************************** class a2bus_memexp_device: public device_t, public device_a2bus_card_interface { public: bool m_isramfactor; uint8_t m_bankhior; int m_addrmask; protected: // construction/destruction a2bus_memexp_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock); virtual void device_start() override; virtual void device_reset() override; virtual void device_add_mconfig(machine_config &config) override; virtual const tiny_rom_entry *device_rom_region() const override; // overrides of standard a2bus slot functions virtual uint8_t read_c0nx(uint8_t offset) override; virtual void write_c0nx(uint8_t offset, uint8_t data) override; virtual uint8_t read_cnxx(uint8_t offset) override; virtual uint8_t read_c800(uint16_t offset) override; private: uint8_t *m_rom; uint8_t m_regs[0x10]; uint8_t m_ram[8*1024*1024]; int m_wptr, m_liveptr; }; class a2bus_memexpapple_device : public a2bus_memexp_device { public: a2bus_memexpapple_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); }; class a2bus_ramfactor_device : public a2bus_memexp_device { public: a2bus_ramfactor_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); virtual const tiny_rom_entry *device_rom_region() const override; }; // device type definition DECLARE_DEVICE_TYPE(A2BUS_MEMEXP, a2bus_memexpapple_device) DECLARE_DEVICE_TYPE(A2BUS_RAMFACTOR, a2bus_ramfactor_device) #endif // MAME_BUS_A2BUS_A2MEMEXP_H