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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Commodore PET Memory Expansion Port emulation
**********************************************************************
**********************************************************************/
#ifndef MAME_BUS_PET_EXP_H
#define MAME_BUS_PET_EXP_H
#pragma once
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> pet_expansion_slot_device
class device_pet_expansion_card_interface;
class pet_expansion_slot_device : public device_t,
public device_single_card_slot_interface<device_pet_expansion_card_interface>
{
public:
template <typename T>
pet_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock, T &&opts, const char *dflt)
: pet_expansion_slot_device(mconfig, tag, owner, clock)
{
option_reset();
opts(*this);
set_default_option(dflt);
set_fixed(false);
}
pet_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
virtual ~pet_expansion_slot_device();
auto dma_read_callback() { return m_read_dma.bind(); }
auto dma_write_callback() { return m_write_dma.bind(); }
// computer interface
int norom_r(offs_t offset, int sel);
uint8_t read(offs_t offset, uint8_t data, int &sel);
void write(offs_t offset, uint8_t data, int &sel);
DECLARE_READ_LINE_MEMBER( diag_r );
DECLARE_WRITE_LINE_MEMBER( irq_w );
// cartridge interface
uint8_t dma_bd_r(offs_t offset);
void dma_bd_w(offs_t offset, uint8_t data);
int phi2();
enum
{
SEL_NONE = -1,
SEL0 = 0,
SEL1,
SEL2,
SEL3,
SEL4,
SEL5,
SEL6,
SEL7,
SEL8,
SEL9,
SELA,
SELB,
SELC,
SELD,
SELE,
SELF
};
protected:
// device-level overrides
virtual void device_start() override;
device_pet_expansion_card_interface *m_card;
devcb_read8 m_read_dma;
devcb_write8 m_write_dma;
};
// ======================> device_pet_expansion_card_interface
class device_pet_expansion_card_interface : public device_interface
{
friend class pet_expansion_slot_device;
public:
// construction/destruction
virtual ~device_pet_expansion_card_interface();
protected:
device_pet_expansion_card_interface(const machine_config &mconfig, device_t &device);
// runtime
virtual int pet_norom_r(offs_t offset, int sel) { return 1; }
virtual uint8_t pet_bd_r(offs_t offset, uint8_t data, int &sel) { return data; }
virtual void pet_bd_w(offs_t offset, uint8_t data, int &sel) { }
virtual int pet_diag_r() { return 1; }
virtual void pet_irq_w(int state) { }
pet_expansion_slot_device *m_slot;
};
// device type definition
DECLARE_DEVICE_TYPE(PET_EXPANSION_SLOT, pet_expansion_slot_device)
void pet_expansion_cards(device_slot_interface &device);
#endif // MAME_BUS_PET_EXP_H
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