diff options
Diffstat (limited to 'src/devices/bus/pet/exp.c')
-rw-r--r-- | src/devices/bus/pet/exp.c | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/src/devices/bus/pet/exp.c b/src/devices/bus/pet/exp.c new file mode 100644 index 00000000000..e550c2cf80f --- /dev/null +++ b/src/devices/bus/pet/exp.c @@ -0,0 +1,204 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/********************************************************************** + + Commodore PET Memory Expansion Port emulation + +**********************************************************************/ + +#include "exp.h" + + + +//************************************************************************** +// MACROS/CONSTANTS +//************************************************************************** + +#define LOG 0 + + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +const device_type PET_EXPANSION_SLOT = &device_creator<pet_expansion_slot_device>; + + + +//************************************************************************** +// 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, "pet_expansion_slot", __FILE__), + 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<pet_expansion_slot_device *>(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<device_pet_expansion_card_interface *>(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(); +} + + +//------------------------------------------------- +// SLOT_INTERFACE( pet_expansion_cards ) +//------------------------------------------------- + +// slot devices +#include "64k.h" +#include "hsg.h" +#include "superpet.h" + +SLOT_INTERFACE_START( pet_expansion_cards ) + SLOT_INTERFACE("64k", PET_64K) + SLOT_INTERFACE("hsga", CBM8000_HSG_A) + SLOT_INTERFACE("hsgb", CBM8000_HSG_B) + SLOT_INTERFACE("superpet", SUPERPET) +SLOT_INTERFACE_END |