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Diffstat (limited to 'src/devices/bus/cbm2/exp.c')
-rw-r--r-- | src/devices/bus/cbm2/exp.c | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/src/devices/bus/cbm2/exp.c b/src/devices/bus/cbm2/exp.c new file mode 100644 index 00000000000..f45dbc2caca --- /dev/null +++ b/src/devices/bus/cbm2/exp.c @@ -0,0 +1,206 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/********************************************************************** + + Commodore CBM-II Expansion Port emulation + +**********************************************************************/ + +#include "exp.h" + + + +//************************************************************************** +// MACROS/CONSTANTS +//************************************************************************** + +#define LOG 0 + + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +const device_type CBM2_EXPANSION_SLOT = &device_creator<cbm2_expansion_slot_device>; + + + +//************************************************************************** +// DEVICE CBM2_EXPANSION CARD INTERFACE +//************************************************************************** + +//------------------------------------------------- +// device_cbm2_expansion_card_interface - constructor +//------------------------------------------------- + +device_cbm2_expansion_card_interface::device_cbm2_expansion_card_interface(const machine_config &mconfig, device_t &device) + : device_slot_card_interface(mconfig, device), + m_bank1(*this, "bank1"), + m_bank2(*this, "bank2"), + m_bank3(*this, "bank3") +{ + m_slot = dynamic_cast<cbm2_expansion_slot_device *>(device.owner()); +} + + +//------------------------------------------------- +// ~device_cbm2_expansion_card_interface - destructor +//------------------------------------------------- + +device_cbm2_expansion_card_interface::~device_cbm2_expansion_card_interface() +{ +} + + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// cbm2_expansion_slot_device - constructor +//------------------------------------------------- + +cbm2_expansion_slot_device::cbm2_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, CBM2_EXPANSION_SLOT, "CBM-II expansion port", tag, owner, clock, "cbm2_expansion_slot", __FILE__), + device_slot_interface(mconfig, *this), + device_image_interface(mconfig, *this) +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void cbm2_expansion_slot_device::device_start() +{ + m_card = dynamic_cast<device_cbm2_expansion_card_interface *>(get_card_device()); + + // inherit bus clock + if (clock() == 0) + { + cbm2_expansion_slot_device *root = machine().device<cbm2_expansion_slot_device>(CBM2_EXPANSION_SLOT_TAG); + assert(root); + set_unscaled_clock(root->clock()); + } +} + + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void cbm2_expansion_slot_device::device_reset() +{ +} + + +//------------------------------------------------- +// call_load - +//------------------------------------------------- + +bool cbm2_expansion_slot_device::call_load() +{ + size_t size = 0; + + if (m_card) + { + if (software_entry() == NULL) + { + size = length(); + + if (!core_stricmp(filetype(), "20")) + { + m_card->m_bank1.allocate(size); + fread(m_card->m_bank1, size); + } + else if (!core_stricmp(filetype(), "40")) + { + m_card->m_bank2.allocate(size); + fread(m_card->m_bank2, size); + } + else if (!core_stricmp(filetype(), "60")) + { + m_card->m_bank3.allocate(size); + fread(m_card->m_bank3, size); + } + } + else + { + load_software_region("bank1", m_card->m_bank1); + load_software_region("bank2", m_card->m_bank2); + load_software_region("bank3", m_card->m_bank3); + } + } + + return IMAGE_INIT_PASS; +} + + +//------------------------------------------------- +// call_softlist_load - +//------------------------------------------------- + +bool cbm2_expansion_slot_device::call_softlist_load(software_list_device &swlist, const char *swname, const rom_entry *start_entry) +{ + load_software_part_region(*this, swlist, swname, start_entry); + + return true; +} + + +//------------------------------------------------- +// get_default_card_software - +//------------------------------------------------- + +void cbm2_expansion_slot_device::get_default_card_software(std::string &result) +{ + software_get_default_slot(result, "standard"); +} + + +//------------------------------------------------- +// read - cartridge data read +//------------------------------------------------- + +UINT8 cbm2_expansion_slot_device::read(address_space &space, offs_t offset, UINT8 data, int csbank1, int csbank2, int csbank3) +{ + if (m_card != NULL) + { + data = m_card->cbm2_bd_r(space, offset, data, csbank1, csbank2, csbank3); + } + + return data; +} + + +//------------------------------------------------- +// write - cartridge data write +//------------------------------------------------- + +void cbm2_expansion_slot_device::write(address_space &space, offs_t offset, UINT8 data, int csbank1, int csbank2, int csbank3) +{ + if (m_card != NULL) + { + m_card->cbm2_bd_w(space, offset, data, csbank1, csbank2, csbank3); + } +} + + +//------------------------------------------------- +// SLOT_INTERFACE( cbm2_expansion_cards ) +//------------------------------------------------- + +// slot devices +#include "24k.h" +#include "hrg.h" +#include "std.h" + +SLOT_INTERFACE_START( cbm2_expansion_cards ) + SLOT_INTERFACE("24k", CBM2_24K) + SLOT_INTERFACE("hrga", CBM2_HRG_A) + SLOT_INTERFACE("hrgb", CBM2_HRG_B) + SLOT_INTERFACE_INTERNAL("standard", CBM2_STD) +SLOT_INTERFACE_END |