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Diffstat (limited to 'src/devices/bus/vidbrain/exp.cpp')
-rw-r--r-- | src/devices/bus/vidbrain/exp.cpp | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/src/devices/bus/vidbrain/exp.cpp b/src/devices/bus/vidbrain/exp.cpp new file mode 100644 index 00000000000..e3634283efa --- /dev/null +++ b/src/devices/bus/vidbrain/exp.cpp @@ -0,0 +1,206 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/********************************************************************** + + VideoBrain Expansion Port emulation + +**********************************************************************/ + +#include "exp.h" + + + +//************************************************************************** +// MACROS/CONSTANTS +//************************************************************************** + +#define LOG 0 + + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +const device_type VIDEOBRAIN_EXPANSION_SLOT = &device_creator<videobrain_expansion_slot_device>; + + + +//************************************************************************** +// DEVICE VIDEOBRAIN_EXPANSION CARD INTERFACE +//************************************************************************** + +//------------------------------------------------- +// device_videobrain_expansion_card_interface - constructor +//------------------------------------------------- + +device_videobrain_expansion_card_interface::device_videobrain_expansion_card_interface(const machine_config &mconfig, device_t &device) : + device_slot_card_interface(mconfig, device), + m_rom_mask(0), + m_ram_mask(0) +{ + m_slot = dynamic_cast<videobrain_expansion_slot_device *>(device.owner()); +} + + +//------------------------------------------------- +// videobrain_roml_pointer - get low ROM pointer +//------------------------------------------------- + +UINT8* device_videobrain_expansion_card_interface::videobrain_rom_pointer(running_machine &machine, size_t size) +{ + if (m_rom.empty()) + { + m_rom.resize(size); + + m_rom_mask = size - 1; + } + + return &m_rom[0]; +} + + +//------------------------------------------------- +// videobrain_ram_pointer - get RAM pointer +//------------------------------------------------- + +UINT8* device_videobrain_expansion_card_interface::videobrain_ram_pointer(running_machine &machine, size_t size) +{ + if (m_ram.empty()) + { + m_ram.resize(size); + + m_ram_mask = size - 1; + } + + return &m_ram[0]; +} + + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// videobrain_expansion_slot_device - constructor +//------------------------------------------------- + +videobrain_expansion_slot_device::videobrain_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, VIDEOBRAIN_EXPANSION_SLOT, "VideoBrain expansion port", tag, owner, clock, "videobrain_expansion_slot", __FILE__), + device_slot_interface(mconfig, *this), + device_image_interface(mconfig, *this), + m_write_extres(*this) +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void videobrain_expansion_slot_device::device_start() +{ + m_cart = dynamic_cast<device_videobrain_expansion_card_interface *>(get_card_device()); + + // resolve callbacks + m_write_extres.resolve_safe(); +} + + +//------------------------------------------------- +// call_load - +//------------------------------------------------- + +bool videobrain_expansion_slot_device::call_load() +{ + if (m_cart) + { + size_t size = 0; + + if (software_entry() == NULL) + { + size = length(); + + fread(m_cart->videobrain_rom_pointer(machine(), size), size); + } + else + { + size = get_software_region_length("rom"); + if (size) memcpy(m_cart->videobrain_rom_pointer(machine(), size), get_software_region("rom"), size); + + size = get_software_region_length("ram"); + if (size) memset(m_cart->videobrain_ram_pointer(machine(), size), 0, size); + } + } + + return IMAGE_INIT_PASS; +} + + +//------------------------------------------------- +// call_softlist_load - +//------------------------------------------------- + +bool videobrain_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 videobrain_expansion_slot_device::get_default_card_software(std::string &result) +{ + software_get_default_slot(result, "standard"); +} + + +//------------------------------------------------- +// bo_r - cartridge data read +//------------------------------------------------- + +UINT8 videobrain_expansion_slot_device::bo_r(address_space &space, offs_t offset, int cs1, int cs2) +{ + UINT8 data = 0; + + if (m_cart != NULL) + { + data = m_cart->videobrain_bo_r(space, offset, cs1, cs2); + } + + return data; +} + + +//------------------------------------------------- +// bo_w - cartridge data write +//------------------------------------------------- + +void videobrain_expansion_slot_device::bo_w(address_space &space, offs_t offset, UINT8 data, int cs1, int cs2) +{ + if (m_cart != NULL) + { + m_cart->videobrain_bo_w(space, offset, data, cs1, cs2); + } +} + + +//------------------------------------------------- +// SLOT_INTERFACE_START( vidbrain_expansion_cards ) +//------------------------------------------------- + +// slot devices +#include "std.h" +#include "money_minder.h" +#include "timeshare.h" + +SLOT_INTERFACE_START( vidbrain_expansion_cards ) + SLOT_INTERFACE_INTERNAL("standard", VB_STD) + SLOT_INTERFACE_INTERNAL("moneyminder", VB_MONEY_MINDER) + SLOT_INTERFACE_INTERNAL("timeshare", VB_TIMESHARE) +SLOT_INTERFACE_END |