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// license:BSD-3-Clause
// copyright-holders:Nigel Barnes
/**********************************************************************
Solidisk Fourmeg RAM/ROM Expansions
http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/Solidisk_4Meg.html
**********************************************************************/
#ifndef MAME_BUS_BBC_INTERNAL_STL4M32_H
#define MAME_BUS_BBC_INTERNAL_STL4M32_H
#include "internal.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
class bbc_stl4m32_device :
public device_t,
public device_bbc_internal_interface
{
public:
// construction/destruction
bbc_stl4m32_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
DECLARE_INPUT_CHANGED_MEMBER(clock_switch);
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 bool overrides_rom() override { return true; }
virtual bool overrides_ram() override { return true; }
virtual bool overrides_mos() override { return true; }
virtual uint8_t ram_r(offs_t offset) override;
virtual void ram_w(offs_t offset, uint8_t data) override;
virtual void romsel_w(offs_t offset, uint8_t data) override;
virtual uint8_t paged_r(offs_t offset) override;
virtual void paged_w(offs_t offset, uint8_t data) override;
virtual uint8_t mos_r(offs_t offset) override;
virtual void mos_w(offs_t offset, uint8_t data) override;
optional_device_array<bbc_romslot_device, 16> m_rom;
std::unique_ptr<uint8_t[]> m_ram;
uint8_t m_romsel;
uint8_t m_ramsel;
uint8_t m_shadow;
};
// device type definition
DECLARE_DEVICE_TYPE(BBC_STL4M32, bbc_stl4m32_device);
#endif /* MAME_BUS_BBC_INTERNAL_STL4M32_H */
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