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// license:BSD-3-Clause
// copyright-holders:Nigel Barnes
/**********************************************************************
ElkSD128 Electron SD Interface
**********************************************************************/
#ifndef MAME_BUS_ELECTRON_ELKSD128_H
#define MAME_BUS_ELECTRON_ELKSD128_H
#include "exp.h"
#include "machine/spi_sdcard.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
class electron_elksd128_device:
public device_t,
public device_electron_expansion_interface
{
public:
// construction/destruction
electron_elksd128_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
// optional information overrides
virtual void device_add_mconfig(machine_config &config) override;
virtual ioport_constructor device_input_ports() const override;
virtual const tiny_rom_entry *device_rom_region() const override;
virtual uint8_t expbus_r(offs_t offset) override;
virtual void expbus_w(offs_t offset, uint8_t data) override;
private:
required_memory_region m_flash;
required_device<spi_sdcard_device> m_sdcard;
required_ioport m_joy;
uint8_t m_romsel;
uint8_t m_adc_channel;
uint8_t m_swr_lock;
TIMER_CALLBACK_MEMBER(spi_clock);
emu_timer *m_spi_clock;
bool m_spi_clock_state;
bool m_spi_clock_sysclk;
int m_spi_clock_cycles;
int m_in_bit;
uint8_t m_in_latch;
uint8_t m_out_latch;
std::unique_ptr<uint8_t[]> m_ram;
};
// device type definition
DECLARE_DEVICE_TYPE(ELECTRON_ELKSD128, electron_elksd128_device)
#endif /* MAME_BUS_ELECTRON_ELKSD128_H */
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