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Diffstat (limited to 'src/devices/bus/wswan/slot.c')
-rw-r--r-- | src/devices/bus/wswan/slot.c | 457 |
1 files changed, 457 insertions, 0 deletions
diff --git a/src/devices/bus/wswan/slot.c b/src/devices/bus/wswan/slot.c new file mode 100644 index 00000000000..8da5f6e694d --- /dev/null +++ b/src/devices/bus/wswan/slot.c @@ -0,0 +1,457 @@ +// license:BSD-3-Clause +// copyright-holders:Wilbert Pol +/*********************************************************************************************************** + + Bandai Wonderswan / Wonderswan Color cart emulation + (through slot devices) + + ***********************************************************************************************************/ + + +#include "emu.h" +#include "slot.h" + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + +const device_type WS_CART_SLOT = &device_creator<ws_cart_slot_device>; + +//************************************************************************** +// Wonderswan Cartridges Interface +//************************************************************************** + +//------------------------------------------------- +// device_ws_cart_interface - constructor +//------------------------------------------------- + +device_ws_cart_interface::device_ws_cart_interface(const machine_config &mconfig, device_t &device) + : device_slot_card_interface(mconfig, device), + m_rom(NULL), + m_rom_size(0), + m_bank_mask(0), + m_has_rtc(false), + m_is_rotated(false) +{ +} + + +//------------------------------------------------- +// ~device_ws_cart_interface - destructor +//------------------------------------------------- + +device_ws_cart_interface::~device_ws_cart_interface() +{ +} + +//------------------------------------------------- +// rom_alloc - alloc the space for the cart +//------------------------------------------------- + +void device_ws_cart_interface::rom_alloc(UINT32 size, const char *tag) +{ + if (m_rom == NULL) + { + m_rom = device().machine().memory().region_alloc(std::string(tag).append(WSSLOT_ROM_REGION_TAG).c_str(), size, 1, ENDIANNESS_LITTLE)->base(); + m_rom_size = size; + m_bank_mask = ((m_rom_size >> 16) - 1); + } +} + + +//------------------------------------------------- +// nvram_alloc - alloc the space for the ram +//------------------------------------------------- + +void device_ws_cart_interface::nvram_alloc(UINT32 size) +{ + m_nvram.resize(size); +} + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// ws_cart_slot_device - constructor +//------------------------------------------------- +ws_cart_slot_device::ws_cart_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, WS_CART_SLOT, "Wonderswan Cartridge Slot", tag, owner, clock, "ws_cart_slot", __FILE__), + device_image_interface(mconfig, *this), + device_slot_interface(mconfig, *this), + m_type(WS_STD) +{ +} + + +//------------------------------------------------- +// ws_cart_slot_device - destructor +//------------------------------------------------- + +ws_cart_slot_device::~ws_cart_slot_device() +{ +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void ws_cart_slot_device::device_start() +{ + m_cart = dynamic_cast<device_ws_cart_interface *>(get_card_device()); +} + +//------------------------------------------------- +// device_config_complete - perform any +// operations now that the configuration is +// complete +//------------------------------------------------- + +void ws_cart_slot_device::device_config_complete() +{ + // set brief and instance name + update_names(); +} + + +//------------------------------------------------- +// WSWAN PCB +//------------------------------------------------- + +struct ws_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 ws_slot slot_list[] = +{ + { WS_STD, "ws_rom" }, + { WS_SRAM, "ws_sram" }, + { WS_EEPROM, "ws_eeprom" } +}; + +static int ws_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; +} + +static const char *ws_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 "std"; +} + + +/*------------------------------------------------- + call load + -------------------------------------------------*/ + +bool ws_cart_slot_device::call_load() +{ + if (m_cart) + { + UINT8 *ROM; + UINT32 size = (software_entry() == NULL) ? length() : get_software_region_length("rom"); + UINT32 nvram_size = 0; + + m_cart->rom_alloc(size, tag()); + ROM = m_cart->get_rom_base(); + + if (software_entry() == NULL) + fread(ROM, size); + else + memcpy(ROM, get_software_region("rom"), size); + + if (software_entry() == NULL) + { + int chunks = size / 0x10000; + // get cart type and nvram length + m_type = get_cart_type(ROM, size, nvram_size); + + if (ROM[(chunks - 1) * 0x10000 + 0xfffd]) + m_cart->set_has_rtc(true); + if (ROM[(chunks - 1) * 0x10000 + 0xfffc] & 0x01) + m_cart->set_is_rotated(true); + } + else + { + const char *pcb_name = get_feature("slot"); + if (pcb_name) + m_type = ws_get_pcb_id(pcb_name); + + if (m_type == WS_SRAM) + nvram_size = get_software_region_length("sram"); + if (m_type == WS_EEPROM) + nvram_size = get_software_region_length("eeprom"); + + if (get_feature("rtc")) + { + if (!core_stricmp(get_feature("rtc"), "yes")) + m_cart->set_has_rtc(true); + } + if (get_feature("rotated")) + { + if (!core_stricmp(get_feature("rotated"), "yes")) + m_cart->set_is_rotated(true); + } + } + + //printf("Type: %s\n", ws_get_slot(m_type)); + + if (nvram_size) + { + // allocate NVRAM + m_cart->nvram_alloc(nvram_size); + // and load possible battery save + battery_load(m_cart->get_nvram_base(), m_cart->get_nvram_size(), 0x00); + } + + internal_header_logging(ROM, ((size >> 16) - 1) << 16, size); + } + + return IMAGE_INIT_PASS; +} + +/*------------------------------------------------- + call_unload + -------------------------------------------------*/ + +void ws_cart_slot_device::call_unload() +{ + if (m_cart && m_cart->get_nvram_base() && m_cart->get_nvram_size()) + battery_save(m_cart->get_nvram_base(), m_cart->get_nvram_size()); +} + + +/*------------------------------------------------- + call softlist load + -------------------------------------------------*/ + +bool ws_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 cart type from cart file + -------------------------------------------------*/ + +int ws_cart_slot_device::get_cart_type(UINT8 *ROM, UINT32 len, UINT32 &nvram_len) +{ + int chunks = len / 0x10000; + int type = WS_STD; + + switch (ROM[(chunks - 1) * 0x10000 + 0xfffb]) + { + case 0x00: + break; + case 0x01: // SRAM 64Kbit + type = WS_SRAM; + nvram_len = 0x2000; + break; + case 0x02: // SRAM 256Kbit + type = WS_SRAM; + nvram_len = 0x8000; + break; + case 0x05: // SRAM 512Kbit + type = WS_SRAM; + nvram_len = 0x10000; + break; + case 0x03: // SRAM 1Mbit + type = WS_SRAM; + nvram_len = 0x20000; + break; + case 0x04: // SRAM 2Mbit + type = WS_SRAM; + nvram_len = 0x40000; + break; + case 0x10: // EEPROM 1Kbit + type = WS_EEPROM; + nvram_len = 0x80; + break; + case 0x50: // EEPROM 8Kbit + type = WS_EEPROM; + nvram_len = 0x400; + break; + case 0x20: // EEPROM 16Kbit + type = WS_EEPROM; + nvram_len = 0x800; + break; + default: + printf("Unknown RAM size [0x%X]\n", ROM[(chunks - 1) * 0x10000 + 0xfffb]); + logerror("Unknown RAM size [0x%X]\n", ROM[(chunks - 1) * 0x10000 + 0xfffb]); + break; + } + + return type; +} + +/*------------------------------------------------- + get default card software + -------------------------------------------------*/ + +void ws_cart_slot_device::get_default_card_software(std::string &result) +{ + if (open_image_file(mconfig().options())) + { + const char *slot_string = "ws_rom"; + UINT32 size = core_fsize(m_file); + dynamic_buffer rom(size); + int type; + UINT32 nvram; + + core_fread(m_file, &rom[0], size); + + // nvram size is not really used here, but we set it up nevertheless + type = get_cart_type(&rom[0], size, nvram); + slot_string = ws_get_slot(type); + + //printf("type: %s\n", slot_string); + clear(); + + result.assign(slot_string); + return; + } + + software_get_default_slot(result, "ws_rom"); +} + +/*------------------------------------------------- + read_rom20 + -------------------------------------------------*/ + +READ8_MEMBER(ws_cart_slot_device::read_rom20) +{ + if (m_cart) + return m_cart->read_rom20(space, offset); + else + return 0xff; +} + +/*------------------------------------------------- + read_rom30 + -------------------------------------------------*/ + +READ8_MEMBER(ws_cart_slot_device::read_rom30) +{ + if (m_cart) + return m_cart->read_rom30(space, offset); + else + return 0xff; +} + +/*------------------------------------------------- + read_rom40 + -------------------------------------------------*/ + +READ8_MEMBER(ws_cart_slot_device::read_rom40) +{ + if (m_cart) + return m_cart->read_rom40(space, offset); + else + return 0xff; +} + +/*------------------------------------------------- + read_ram + -------------------------------------------------*/ + +READ8_MEMBER(ws_cart_slot_device::read_ram) +{ + if (m_cart) + return m_cart->read_ram(space, offset); + else + return 0xff; +} + +/*------------------------------------------------- + write_ram + -------------------------------------------------*/ + +WRITE8_MEMBER(ws_cart_slot_device::write_ram) +{ + if (m_cart) + m_cart->write_ram(space, offset, data); +} + +/*------------------------------------------------- + read_io + -------------------------------------------------*/ + +READ8_MEMBER(ws_cart_slot_device::read_io) +{ + if (m_cart) + return m_cart->read_io(space, offset); + else + return 0xff; +} + +/*------------------------------------------------- + write_io + -------------------------------------------------*/ + +WRITE8_MEMBER(ws_cart_slot_device::write_io) +{ + if (m_cart) + m_cart->write_io(space, offset, data); +} + + + +/*------------------------------------------------- + Internal header logging + -------------------------------------------------*/ + +static const char *const sram_str[] = { "none", "64Kbit SRAM", "256Kbit SRAM", "512Kbit SRAM", "1Mbit SRAM", "2Mbit SRAM" }; +static const char *const eeprom_str[] = { "none", "1Kbit EEPROM", "16Kbit EEPROM", "Unknown", "Unknown", "8Kbit EEPROM" }; +static const char *const romsize_str[] = { "Unknown", "Unknown", "4Mbit", "8Mbit", "16Mbit", "Unknown", "32Mbit", "Unknown", "64Mbit", "128Mbit" }; + +void ws_cart_slot_device::internal_header_logging(UINT8 *ROM, UINT32 offs, UINT32 len) +{ + int sum = 0, banks = len / 0x10000; + UINT8 romsize, ramtype, ramsize; + romsize = ROM[offs + 0xfffa]; + ramtype = (ROM[offs + 0xfffb] & 0xf0) ? 1 : 0; // 1 = EEPROM, 0 = SRAM + ramsize = ramtype ? ((ROM[offs + 0xfffb] & 0xf0) >> 4) : (ROM[offs + 0xfffb] & 0x0f); + + + logerror( "ROM DETAILS\n" ); + logerror( "===========\n\n" ); + logerror("\tDeveloper ID: %X\n", ROM[offs + 0xfff6]); + logerror("\tMinimum system: %s\n", ROM[offs + 0xfff7] ? "WonderSwan Color" : "WonderSwan"); + logerror("\tCart ID: %X\n", ROM[offs + 0xfff8]); + logerror("\tROM size: %s\n", romsize_str[romsize]); + if (ramtype) + logerror("\tEEPROM size: %s\n", (ramsize < 6) ? eeprom_str[ramsize] : "Unknown"); + else + logerror("\tSRAM size: %s\n", (ramsize < 6) ? sram_str[ramsize] : "Unknown"); + logerror("\tFeatures: %X\n", ROM[offs + 0xfffc]); + logerror("\tRTC: %s\n", ROM[offs + 0xfffd] ? "yes" : "no"); + for (int i = 0; i < banks; i++) + { + for (int count = 0; count < 0x10000; count++) + { + sum += ROM[(i * 0x10000) + count]; + } + } + sum -= ROM[offs + 0xffff]; + sum -= ROM[offs + 0xfffe]; + sum &= 0xffff; + logerror("\tChecksum: %.2X%.2X (calculated: %04X)\n", ROM[offs + 0xffff], ROM[offs + 0xfffe], sum); +} |