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-rw-r--r--src/devices/bus/wswan/slot.cpp457
1 files changed, 457 insertions, 0 deletions
diff --git a/src/devices/bus/wswan/slot.cpp b/src/devices/bus/wswan/slot.cpp
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+++ b/src/devices/bus/wswan/slot.cpp
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+// 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);
+}