diff options
Diffstat (limited to 'src/devices/bus/vic10/exp.c')
-rw-r--r-- | src/devices/bus/vic10/exp.c | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/src/devices/bus/vic10/exp.c b/src/devices/bus/vic10/exp.c new file mode 100644 index 00000000000..c6d7a43c6bb --- /dev/null +++ b/src/devices/bus/vic10/exp.c @@ -0,0 +1,243 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/********************************************************************** + + Commodore VIC-10 Expansion Port emulation + +**********************************************************************/ + +#include "emu.h" +#include "emuopts.h" +#include "exp.h" + + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +const device_type VIC10_EXPANSION_SLOT = &device_creator<vic10_expansion_slot_device>; + + + +//************************************************************************** +// DEVICE VIC10_EXPANSION CARD INTERFACE +//************************************************************************** + +//------------------------------------------------- +// device_vic10_expansion_card_interface - constructor +//------------------------------------------------- + +device_vic10_expansion_card_interface::device_vic10_expansion_card_interface(const machine_config &mconfig, device_t &device) + : device_slot_card_interface(mconfig,device), + m_lorom(*this, "lorom"), + m_exram(*this, "exram"), + m_uprom(*this, "uprom") +{ + m_slot = dynamic_cast<vic10_expansion_slot_device *>(device.owner()); +} + + +//------------------------------------------------- +// ~device_vic10_expansion_card_interface - destructor +//------------------------------------------------- + +device_vic10_expansion_card_interface::~device_vic10_expansion_card_interface() +{ +} + + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// vic10_expansion_slot_device - constructor +//------------------------------------------------- + +vic10_expansion_slot_device::vic10_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, VIC10_EXPANSION_SLOT, "VIC-10 expansion port", tag, owner, clock, "vic10_expansion_slot", __FILE__), + device_slot_interface(mconfig, *this), + device_image_interface(mconfig, *this), + m_write_irq(*this), + m_write_res(*this), + m_write_cnt(*this), + m_write_sp(*this) +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void vic10_expansion_slot_device::device_start() +{ + m_card = dynamic_cast<device_vic10_expansion_card_interface *>(get_card_device()); + + // resolve callbacks + m_write_irq.resolve_safe(); + m_write_res.resolve_safe(); + m_write_cnt.resolve_safe(); + m_write_sp.resolve_safe(); + + // inherit bus clock + if (clock() == 0) + { + vic10_expansion_slot_device *root = machine().device<vic10_expansion_slot_device>(VIC10_EXPANSION_SLOT_TAG); + assert(root); + set_unscaled_clock(root->clock()); + } +} + + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void vic10_expansion_slot_device::device_reset() +{ + if (get_card_device()) + { + get_card_device()->reset(); + } +} + + +//------------------------------------------------- +// call_load - +//------------------------------------------------- + +bool vic10_expansion_slot_device::call_load() +{ + if (m_card) + { + size_t size = 0; + + if (software_entry() == NULL) + { + size = length(); + + if (!core_stricmp(filetype(), "80")) + { + fread(m_card->m_lorom, 0x2000); + + if (size == 0x4000) + { + fread(m_card->m_uprom, 0x2000); + } + } + else if (!core_stricmp(filetype(), "e0")) + { + fread(m_card->m_uprom, size); + } + else if (!core_stricmp(filetype(), "crt")) + { + size_t roml_size = 0; + size_t romh_size = 0; + int exrom = 1; + int game = 1; + + if (cbm_crt_read_header(m_file, &roml_size, &romh_size, &exrom, &game)) + { + UINT8 *roml = NULL; + UINT8 *romh = NULL; + + m_card->m_lorom.allocate(roml_size); + m_card->m_uprom.allocate(romh_size); + + if (roml_size) roml = m_card->m_lorom; + if (romh_size) romh = m_card->m_lorom; + + cbm_crt_read_data(m_file, roml, romh); + } + } + } + else + { + load_software_region("lorom", m_card->m_lorom); + load_software_region("exram", m_card->m_exram); + load_software_region("uprom", m_card->m_uprom); + } + } + + return IMAGE_INIT_PASS; +} + + +//------------------------------------------------- +// call_softlist_load - +//------------------------------------------------- + +bool vic10_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 vic10_expansion_slot_device::get_default_card_software(std::string &result) +{ + if (open_image_file(mconfig().options())) + { + if (!core_stricmp(filetype(), "crt")) + { + cbm_crt_get_card(result, m_file); + return; + } + + clear(); + } + + software_get_default_slot(result, "standard"); +} + + +//------------------------------------------------- +// cd_r - cartridge data read +//------------------------------------------------- + +UINT8 vic10_expansion_slot_device::cd_r(address_space &space, offs_t offset, UINT8 data, int lorom, int uprom, int exram) +{ + if (m_card != NULL) + { + data = m_card->vic10_cd_r(space, offset, data, lorom, uprom, exram); + } + + return data; +} + + +//------------------------------------------------- +// cd_w - cartridge data write +//------------------------------------------------- + +void vic10_expansion_slot_device::cd_w(address_space &space, offs_t offset, UINT8 data, int lorom, int uprom, int exram) +{ + if (m_card != NULL) + { + m_card->vic10_cd_w(space, offset, data, lorom, uprom, exram); + } +} + +READ_LINE_MEMBER( vic10_expansion_slot_device::p0_r ) { int state = 0; if (m_card != NULL) state = m_card->vic10_p0_r(); return state; } +WRITE_LINE_MEMBER( vic10_expansion_slot_device::p0_w ) { if (m_card != NULL) m_card->vic10_p0_w(state); } + + +//------------------------------------------------- +// SLOT_INTERFACE( vic10_expansion_cards ) +//------------------------------------------------- + +// slot devices +#include "std.h" + +SLOT_INTERFACE_START( vic10_expansion_cards ) + // the following need ROMs from the software list + SLOT_INTERFACE_INTERNAL("standard", VIC10_STD) +SLOT_INTERFACE_END |