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author | 2013-10-22 15:44:27 +0000 | |
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committer | 2013-10-22 15:44:27 +0000 | |
commit | 0b91c21b366be4d0c1bcabdbe74e6b9d82a62271 (patch) | |
tree | 1804ed0b9de916825d5fc7e1387d33aac256f4c0 /src/emu/bus/cbm2/exp.c | |
parent | 47c548e760b6c4447f7b15e7d403060d0051b994 (diff) |
(MESS) Moved a bunch of buses under emu/bus. (nw)
Diffstat (limited to 'src/emu/bus/cbm2/exp.c')
-rw-r--r-- | src/emu/bus/cbm2/exp.c | 304 |
1 files changed, 304 insertions, 0 deletions
diff --git a/src/emu/bus/cbm2/exp.c b/src/emu/bus/cbm2/exp.c new file mode 100644 index 00000000000..315fa7cbe78 --- /dev/null +++ b/src/emu/bus/cbm2/exp.c @@ -0,0 +1,304 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/********************************************************************** + + Commodore CBM-II Expansion Port emulation + + Copyright MESS Team. + Visit http://mamedev.org for licensing and usage restrictions. + +**********************************************************************/ + +#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(NULL), + m_bank2(NULL), + m_bank3(NULL), + m_ram(NULL), + m_nvram(NULL), + m_nvram_size(0), + m_bank1_mask(0), + m_bank2_mask(0), + m_bank3_mask(0), + m_ram_mask(0) +{ + 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() +{ +} + + +//------------------------------------------------- +// cbm2_bank1_pointer - get bank 1 pointer +//------------------------------------------------- + +UINT8* device_cbm2_expansion_card_interface::cbm2_bank1_pointer(running_machine &machine, size_t size) +{ + if (m_bank1 == NULL) + { + m_bank1 = auto_alloc_array(machine, UINT8, size); + + m_bank1_mask = size - 1; + } + + return m_bank1; +} + + +//------------------------------------------------- +// cbm2_bank2_pointer - get bank 2 pointer +//------------------------------------------------- + +UINT8* device_cbm2_expansion_card_interface::cbm2_bank2_pointer(running_machine &machine, size_t size) +{ + if (m_bank2 == NULL) + { + m_bank2 = auto_alloc_array(machine, UINT8, size); + + m_bank2_mask = size - 1; + } + + return m_bank2; +} + + +//------------------------------------------------- +// cbm2_bank3_pointer - get bank 3 pointer +//------------------------------------------------- + +UINT8* device_cbm2_expansion_card_interface::cbm2_bank3_pointer(running_machine &machine, size_t size) +{ + if (m_bank3 == NULL) + { + m_bank3 = auto_alloc_array(machine, UINT8, size); + + m_bank3_mask = size - 1; + } + + return m_bank3; +} + + +//------------------------------------------------- +// cbm2_ram_pointer - get RAM pointer +//------------------------------------------------- + +UINT8* device_cbm2_expansion_card_interface::cbm2_ram_pointer(running_machine &machine, size_t size) +{ + if (m_ram == NULL) + { + m_ram = auto_alloc_array(machine, UINT8, size); + + m_ram_mask = size - 1; + } + + return m_ram; +} + + +//------------------------------------------------- +// cbm2_ram_pointer - get NVRAM pointer +//------------------------------------------------- + +UINT8* device_cbm2_expansion_card_interface::cbm2_nvram_pointer(running_machine &machine, size_t size) +{ + if (m_nvram == NULL) + { + m_nvram = auto_alloc_array(machine, UINT8, size); + + m_nvram_mask = size - 1; + m_nvram_size = size; + } + + return m_nvram; +} + + + +//************************************************************************** +// 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 (!mame_stricmp(filetype(), "20")) + { + fread(m_card->cbm2_bank1_pointer(machine(), size), size); + } + else if (!mame_stricmp(filetype(), "40")) + { + fread(m_card->cbm2_bank2_pointer(machine(), size), size); + } + else if (!mame_stricmp(filetype(), "60")) + { + fread(m_card->cbm2_bank3_pointer(machine(), size), size); + } + } + else + { + size = get_software_region_length("bank1"); + if (size) memcpy(m_card->cbm2_bank1_pointer(machine(), size), get_software_region("bank1"), size); + + size = get_software_region_length("bank2"); + if (size) memcpy(m_card->cbm2_bank2_pointer(machine(), size), get_software_region("bank2"), size); + + size = get_software_region_length("bank3"); + if (size) memcpy(m_card->cbm2_bank3_pointer(machine(), size), get_software_region("bank3"), size); + + size = get_software_region_length("ram"); + if (size) memset(m_card->cbm2_ram_pointer(machine(), size), 0, size); + + size = get_software_region_length("nvram"); + if (size) memset(m_card->cbm2_nvram_pointer(machine(), size), 0, size); + } + } + + return IMAGE_INIT_PASS; +} + + +//------------------------------------------------- +// call_softlist_load - +//------------------------------------------------- + +bool cbm2_expansion_slot_device::call_softlist_load(char *swlist, char *swname, rom_entry *start_entry) +{ + load_software_part_region(this, swlist, swname, start_entry); + + return true; +} + + +//------------------------------------------------- +// get_default_card_software - +//------------------------------------------------- + +const char * cbm2_expansion_slot_device::get_default_card_software(const machine_config &config, emu_options &options) +{ + return software_get_default_slot(config, options, this, "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_INTERFACE_START( cbm2_expansion_cards ) + SLOT_INTERFACE("24k", CBM2_24K) + SLOT_INTERFACE_INTERNAL("standard", CBM2_STD) + SLOT_INTERFACE_INTERNAL("graphic", CBM2_GRAPHIC) +SLOT_INTERFACE_END |