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Diffstat (limited to 'src/devices/bus/vboy/slot.cpp')
-rw-r--r-- | src/devices/bus/vboy/slot.cpp | 273 |
1 files changed, 273 insertions, 0 deletions
diff --git a/src/devices/bus/vboy/slot.cpp b/src/devices/bus/vboy/slot.cpp new file mode 100644 index 00000000000..da00aeaca04 --- /dev/null +++ b/src/devices/bus/vboy/slot.cpp @@ -0,0 +1,273 @@ +// license:BSD-3-Clause +// copyright-holders:Fabio Priuli +/*********************************************************************************************************** + + Nintendo Virtual Boy cart emulation + (through slot devices) + + ***********************************************************************************************************/ + + +#include "emu.h" +#include "slot.h" + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + +const device_type VBOY_CART_SLOT = &device_creator<vboy_cart_slot_device>; + +//************************************************************************** +// vboy cartridges Interface +//************************************************************************** + +//------------------------------------------------- +// device_vboy_cart_interface - constructor +//------------------------------------------------- + +device_vboy_cart_interface::device_vboy_cart_interface(const machine_config &mconfig, device_t &device) + : device_slot_card_interface(mconfig, device), + m_rom(NULL), + m_rom_size(0), + m_rom_mask(0) +{ +} + + +//------------------------------------------------- +// ~device_vboy_cart_interface - destructor +//------------------------------------------------- + +device_vboy_cart_interface::~device_vboy_cart_interface() +{ +} + +//------------------------------------------------- +// rom_alloc - alloc the space for the cart +//------------------------------------------------- + +void device_vboy_cart_interface::rom_alloc(UINT32 size, const char *tag) +{ + if (m_rom == NULL) + { + m_rom = (UINT32 *)device().machine().memory().region_alloc(std::string(tag).append(VBOYSLOT_ROM_REGION_TAG).c_str(), size, 4, ENDIANNESS_LITTLE)->base(); + m_rom_size = size/4; + m_rom_mask = m_rom_size - 1; + } +} + + +//------------------------------------------------- +// ram_alloc - alloc the space for the ram +//------------------------------------------------- + +void device_vboy_cart_interface::eeprom_alloc(UINT32 size) +{ + m_eeprom.resize(size/sizeof(UINT32)); +} + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// vboy_cart_slot_device - constructor +//------------------------------------------------- +vboy_cart_slot_device::vboy_cart_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, VBOY_CART_SLOT, "Nintendo Virtual Boy Cartridge Slot", tag, owner, clock, "vboy_cart_slot", __FILE__), + device_image_interface(mconfig, *this), + device_slot_interface(mconfig, *this), + m_type(VBOY_STD) +{ +} + + +//------------------------------------------------- +// vboy_cart_slot_device - destructor +//------------------------------------------------- + +vboy_cart_slot_device::~vboy_cart_slot_device() +{ +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void vboy_cart_slot_device::device_start() +{ + m_cart = dynamic_cast<device_vboy_cart_interface *>(get_card_device()); +} + +//------------------------------------------------- +// device_config_complete - perform any +// operations now that the configuration is +// complete +//------------------------------------------------- + +void vboy_cart_slot_device::device_config_complete() +{ + // set brief and instance name + update_names(); +} + + +//------------------------------------------------- +// vboy PCB +//------------------------------------------------- + +struct vboy_slot +{ + int pcb_id; + const char *slot_option; +}; + +// Here, we take the feature attribute from .xml (i.e. the PCB name) and we assign a unique ID to it +static const vboy_slot slot_list[] = +{ + { VBOY_STD, "vb_rom" }, + { VBOY_EEPROM, "vb_eeprom" } +}; + +static int vboy_get_pcb_id(const char *slot) +{ + for (int i = 0; i < ARRAY_LENGTH(slot_list); i++) + { + if (!core_stricmp(slot_list[i].slot_option, slot)) + return slot_list[i].pcb_id; + } + + return 0; +} + +#if 0 +static const char *vboy_get_slot(int type) +{ + for (int i = 0; i < ARRAY_LENGTH(slot_list); i++) + { + if (slot_list[i].pcb_id == type) + return slot_list[i].slot_option; + } + + return "vb_rom"; +} +#endif + +/*------------------------------------------------- + call load + -------------------------------------------------*/ + +bool vboy_cart_slot_device::call_load() +{ + if (m_cart) + { + UINT8 *ROM; + UINT32 len = (software_entry() == NULL) ? length() : get_software_region_length("rom"); + bool has_eeprom = (software_entry() != NULL) && get_software_region("eeprom"); + + if (len > 0x200000) + { + seterror(IMAGE_ERROR_UNSPECIFIED, "Unsupported cartridge size"); + return IMAGE_INIT_FAIL; + } + + // always alloc 0x200000 so to be able to directly map the region + // to the address map (speeding up emulation a bit) + m_cart->rom_alloc(0x200000, tag()); + if (has_eeprom) + m_cart->eeprom_alloc(get_software_region_length("eeprom")); + + ROM = (UINT8 *)m_cart->get_rom_base(); + + if (software_entry() == NULL) + fread(ROM, len); + else + memcpy(ROM, get_software_region("rom"), len); + + if (len < 0x080000) { memcpy(ROM + 0x040000, ROM, 0x040000); } + if (len < 0x100000) { memcpy(ROM + 0x080000, ROM, 0x080000); } + if (len < 0x200000) { memcpy(ROM + 0x100000, ROM, 0x100000); } + + if (software_entry() == NULL) + m_type = vboy_get_pcb_id("vb_rom"); + else + { + const char *pcb_name = get_feature("slot"); + if (pcb_name) + m_type = vboy_get_pcb_id(pcb_name); + } + + //printf("Type: %s\n", vboy_get_slot(m_type)); + + return IMAGE_INIT_PASS; + } + + return IMAGE_INIT_PASS; +} + + +/*------------------------------------------------- + call_unload + -------------------------------------------------*/ + +void vboy_cart_slot_device::call_unload() +{ + if (m_cart && m_cart->get_eeprom_base() && m_cart->get_eeprom_size()) + battery_save(m_cart->get_eeprom_base(), m_cart->get_eeprom_size() * 4); +} + +/*------------------------------------------------- + call softlist load + -------------------------------------------------*/ + +bool vboy_cart_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 vboy_cart_slot_device::get_default_card_software(std::string &result) +{ + software_get_default_slot(result, "vb_rom"); +} + +/*------------------------------------------------- + read + -------------------------------------------------*/ + +READ32_MEMBER(vboy_cart_slot_device::read_cart) +{ + if (m_cart) + return m_cart->read_cart(space, offset, mem_mask); + else + return 0xffffffff; +} + +/*------------------------------------------------- + read + -------------------------------------------------*/ + +READ32_MEMBER(vboy_cart_slot_device::read_eeprom) +{ + if (m_cart) + return m_cart->read_eeprom(space, offset, mem_mask); + else + return 0xffffffff; +} + +/*------------------------------------------------- + write + -------------------------------------------------*/ + +WRITE32_MEMBER(vboy_cart_slot_device::write_eeprom) +{ + if (m_cart) + m_cart->write_eeprom(space, offset, data, mem_mask); +} |