/********************************************************************** Commodore PET Memory Expansion Port emulation Copyright MESS Team. Visit http://mamedev.org for licensing and usage restrictions. **********************************************************************/ #include "machine/petexp.h" //************************************************************************** // MACROS/CONSTANTS //************************************************************************** #define LOG 0 //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** const device_type PET_EXPANSION_SLOT = &device_creator; //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // pet_expansion_slot_device - constructor //------------------------------------------------- pet_expansion_slot_device::pet_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, PET_EXPANSION_SLOT, "PET memory expansion port", tag, owner, clock), device_slot_interface(mconfig, *this), m_read_dma(*this), m_write_dma(*this) { } //------------------------------------------------- // pet_expansion_slot_device - destructor //------------------------------------------------- pet_expansion_slot_device::~pet_expansion_slot_device() { } //------------------------------------------------- // device_pet_expansion_card_interface - constructor //------------------------------------------------- device_pet_expansion_card_interface::device_pet_expansion_card_interface(const machine_config &mconfig, device_t &device) : device_slot_card_interface(mconfig, device) { m_slot = dynamic_cast(device.owner()); } //------------------------------------------------- // ~device_pet_expansion_card_interface - destructor //------------------------------------------------- device_pet_expansion_card_interface::~device_pet_expansion_card_interface() { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void pet_expansion_slot_device::device_start() { m_card = dynamic_cast(get_card_device()); // resolve callbacks m_read_dma.resolve_safe(0); m_write_dma.resolve_safe(); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void pet_expansion_slot_device::device_reset() { if (m_card != NULL) { get_card_device()->reset(); } } //------------------------------------------------- // norom_r - NO ROM read //------------------------------------------------- int pet_expansion_slot_device::norom_r(address_space &space, offs_t offset, int sel) { return m_card ? m_card->pet_norom_r(space, offset, sel) : 1; } //------------------------------------------------- // read - buffered data read //------------------------------------------------- UINT8 pet_expansion_slot_device::read(address_space &space, offs_t offset, UINT8 data, int &sel) { if (m_card != NULL) { data = m_card->pet_bd_r(space, offset, data, sel); } return data; } //------------------------------------------------- // write - buffered data write //------------------------------------------------- void pet_expansion_slot_device::write(address_space &space, offs_t offset, UINT8 data, int &sel) { if (m_card != NULL) { m_card->pet_bd_w(space, offset, data, sel); } } //------------------------------------------------- // diag_r - DIAG read //------------------------------------------------- READ_LINE_MEMBER( pet_expansion_slot_device::diag_r ) { return m_card ? m_card->pet_diag_r() : 1; } //------------------------------------------------- // irq_w - IRQ write //------------------------------------------------- WRITE_LINE_MEMBER( pet_expansion_slot_device::irq_w ) { if (m_card) m_card->pet_irq_w(state); } //------------------------------------------------- // dma_bd_r - DMA read //------------------------------------------------- UINT8 pet_expansion_slot_device::dma_bd_r(offs_t offset) { return m_read_dma(offset); } //------------------------------------------------- // dma_bd_w - DMA write //------------------------------------------------- void pet_expansion_slot_device::dma_bd_w(offs_t offset, UINT8 data) { m_write_dma(offset, data); } //------------------------------------------------- // phi2 - system clock frequency //------------------------------------------------- int pet_expansion_slot_device::phi2() { return clock(); }