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// license:BSD-3-Clause
// copyright-holders:Nigel Barnes
/**********************************************************************
Peartree MRxx00 ROM/RAM Boards
http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/Peartree_ROMExpansion.html
**********************************************************************/
#ifndef MAME_BUS_BBC_INTERNAL_PEARTREE_H
#define MAME_BUS_BBC_INTERNAL_PEARTREE_H
#include "internal.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
class bbc_mr3000_device :
public device_t,
public device_bbc_internal_interface
{
public:
// construction/destruction
bbc_mr3000_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
protected:
bbc_mr3000_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, const XTAL &clock);
// device-level overrides
virtual void device_start() override;
// optional information overrides
virtual void device_add_mconfig(machine_config &config) override;
optional_device_array<bbc_romslot_device, 16> m_rom;
virtual bool overrides_rom() override { return true; }
virtual void romsel_w(offs_t offset, uint8_t data) override { m_romsel = data & 0x0f; }
virtual uint8_t paged_r(offs_t offset) override;
virtual void paged_w(offs_t offset, uint8_t data) override;
uint8_t m_romsel;
};
class bbc_mr4200_device : public bbc_mr3000_device
{
public:
// construction/destruction
bbc_mr4200_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
protected:
// optional information overrides
virtual void device_add_mconfig(machine_config &config) override;
virtual ioport_constructor device_input_ports() const override;
required_ioport m_wp;
virtual void paged_w(offs_t offset, uint8_t data) override;
};
class bbc_mr4300_device :
public device_t,
public device_bbc_internal_interface
{
public:
// construction/destruction
bbc_mr4300_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
protected:
bbc_mr4300_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, const XTAL &clock);
// device-level overrides
virtual void device_start() override;
// optional information overrides
virtual void device_add_mconfig(machine_config &config) override;
virtual ioport_constructor device_input_ports() const override;
optional_device_array<bbc_romslot_device, 16> m_rom;
required_ioport m_wp;
virtual bool overrides_rom() override { return true; }
virtual void romsel_w(offs_t offset, uint8_t data) override { m_romsel = data & 0x0f; }
virtual uint8_t paged_r(offs_t offset) override;
virtual void paged_w(offs_t offset, uint8_t data) override;
uint8_t m_romsel;
};
class bbc_mr4800_device : public bbc_mr4300_device
{
public:
// construction/destruction
bbc_mr4800_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
protected:
// optional information overrides
virtual void device_add_mconfig(machine_config &config) override;
};
// device type definition
DECLARE_DEVICE_TYPE(BBC_MR3000, bbc_mr3000_device);
DECLARE_DEVICE_TYPE(BBC_MR4200, bbc_mr4200_device);
DECLARE_DEVICE_TYPE(BBC_MR4300, bbc_mr4300_device);
DECLARE_DEVICE_TYPE(BBC_MR4800, bbc_mr4800_device);
#endif /* MAME_BUS_BBC_INTERNAL_PEARTREE_H */
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