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-rw-r--r--src/devices/bus/scv/slot.c317
1 files changed, 317 insertions, 0 deletions
diff --git a/src/devices/bus/scv/slot.c b/src/devices/bus/scv/slot.c
new file mode 100644
index 00000000000..12ecf7c4db9
--- /dev/null
+++ b/src/devices/bus/scv/slot.c
@@ -0,0 +1,317 @@
+// license:BSD-3-Clause
+// copyright-holders:Fabio Priuli
+/***********************************************************************************************************
+
+ Epoch Super Cassette Vision cart emulation
+ (through slot devices)
+
+ ***********************************************************************************************************/
+
+
+#include "emu.h"
+#include "slot.h"
+
+//**************************************************************************
+// GLOBAL VARIABLES
+//**************************************************************************
+
+const device_type SCV_CART_SLOT = &device_creator<scv_cart_slot_device>;
+
+//**************************************************************************
+// SCV cartridges Interface
+//**************************************************************************
+
+//-------------------------------------------------
+// device_scv_cart_interface - constructor
+//-------------------------------------------------
+
+device_scv_cart_interface::device_scv_cart_interface(const machine_config &mconfig, device_t &device)
+ : device_slot_card_interface(mconfig, device),
+ m_rom(NULL),
+ m_rom_size(0)
+{
+}
+
+
+//-------------------------------------------------
+// ~device_scv_cart_interface - destructor
+//-------------------------------------------------
+
+device_scv_cart_interface::~device_scv_cart_interface()
+{
+}
+
+//-------------------------------------------------
+// rom_alloc - alloc the space for the cart
+//-------------------------------------------------
+
+void device_scv_cart_interface::rom_alloc(UINT32 size, const char *tag)
+{
+ if (m_rom == NULL)
+ {
+ m_rom = device().machine().memory().region_alloc(std::string(tag).append(SCVSLOT_ROM_REGION_TAG).c_str(), size, 1, ENDIANNESS_LITTLE)->base();
+ m_rom_size = size;
+ }
+}
+
+
+//-------------------------------------------------
+// ram_alloc - alloc the space for the ram
+//-------------------------------------------------
+
+void device_scv_cart_interface::ram_alloc(UINT32 size)
+{
+ m_ram.resize(size);
+}
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// scv_cart_slot_device - constructor
+//-------------------------------------------------
+scv_cart_slot_device::scv_cart_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, SCV_CART_SLOT, "SCV Cartridge Slot", tag, owner, clock, "scv_cart_slot", __FILE__),
+ device_image_interface(mconfig, *this),
+ device_slot_interface(mconfig, *this),
+ m_type(SCV_8K)
+{
+}
+
+
+//-------------------------------------------------
+// scv_cart_slot_device - destructor
+//-------------------------------------------------
+
+scv_cart_slot_device::~scv_cart_slot_device()
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void scv_cart_slot_device::device_start()
+{
+ m_cart = dynamic_cast<device_scv_cart_interface *>(get_card_device());
+}
+
+//-------------------------------------------------
+// device_config_complete - perform any
+// operations now that the configuration is
+// complete
+//-------------------------------------------------
+
+void scv_cart_slot_device::device_config_complete()
+{
+ // set brief and instance name
+ update_names();
+}
+
+
+//-------------------------------------------------
+// SCV PCB
+//-------------------------------------------------
+
+struct scv_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 scv_slot slot_list[] =
+{
+ { SCV_8K, "rom8k" },
+ { SCV_16K, "rom16k" },
+ { SCV_32K, "rom32k" },
+ { SCV_32K_RAM, "rom32k_ram" },
+ { SCV_64K, "rom64k" },
+ { SCV_128K, "rom128k" },
+ { SCV_128K_RAM, "rom128k_ram" }
+};
+
+static int scv_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 *scv_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 "rom8k";
+}
+
+
+/*-------------------------------------------------
+ call load
+ -------------------------------------------------*/
+
+bool scv_cart_slot_device::call_load()
+{
+ if (m_cart)
+ {
+ UINT8 *ROM;
+ UINT32 len = (software_entry() == NULL) ? length() : get_software_region_length("rom");
+ bool has_ram = (software_entry() != NULL) && get_software_region("ram");
+
+ if (len > 0x20000)
+ {
+ seterror(IMAGE_ERROR_UNSPECIFIED, "Unsupported cartridge size");
+ return IMAGE_INIT_FAIL;
+ }
+
+ m_cart->rom_alloc(len, tag());
+ if (has_ram)
+ m_cart->ram_alloc(get_software_region_length("ram"));
+
+ ROM = m_cart->get_rom_base();
+
+ if (software_entry() == NULL)
+ fread(ROM, len);
+ else
+ memcpy(ROM, get_software_region("rom"), len);
+
+ if (software_entry() == NULL)
+ m_type = get_cart_type(ROM, len);
+ else
+ {
+ const char *pcb_name = get_feature("slot");
+ if (pcb_name)
+ m_type = scv_get_pcb_id(pcb_name);
+ }
+
+ // for the moment we only support RAM from softlist and in the following configurations
+ // 1) 32K ROM + 8K RAM; 2) 128K ROM + 4K RAM
+ if (m_type == SCV_32K && has_ram)
+ m_type = SCV_32K_RAM;
+ if (m_type == SCV_128K && has_ram)
+ m_type = SCV_128K_RAM;
+
+ //printf("Type: %s\n", scv_get_slot(m_type));
+
+ return IMAGE_INIT_PASS;
+ }
+
+ return IMAGE_INIT_PASS;
+}
+
+
+/*-------------------------------------------------
+ call softlist load
+ -------------------------------------------------*/
+
+bool scv_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 - code to detect NVRAM type from
+ fullpath
+ -------------------------------------------------*/
+
+int scv_cart_slot_device::get_cart_type(UINT8 *ROM, UINT32 len)
+{
+ int type = SCV_8K;
+
+ // TO DO: is there any way to identify carts with RAM?!?
+ switch (len)
+ {
+ case 0x2000:
+ type = SCV_8K;
+ break;
+ case 0x4000:
+ type = SCV_16K;
+ break;
+ case 0x8000:
+ type = SCV_32K;
+ break;
+ case 0x10000:
+ type = SCV_64K;
+ break;
+ case 0x20000:
+ type = SCV_128K;
+ break;
+ }
+
+ return type;
+}
+
+
+/*-------------------------------------------------
+ get default card software
+ -------------------------------------------------*/
+
+void scv_cart_slot_device::get_default_card_software(std::string &result)
+{
+ if (open_image_file(mconfig().options()))
+ {
+ const char *slot_string = "rom8k";
+ UINT32 len = core_fsize(m_file);
+ dynamic_buffer rom(len);
+ int type;
+
+ core_fread(m_file, &rom[0], len);
+
+ type = get_cart_type(&rom[0], len);
+ slot_string = scv_get_slot(type);
+
+ //printf("type: %s\n", slot_string);
+ clear();
+
+ result.assign(slot_string);
+ return;
+ }
+
+ software_get_default_slot(result, "rom8k");
+}
+
+/*-------------------------------------------------
+ read
+ -------------------------------------------------*/
+
+READ8_MEMBER(scv_cart_slot_device::read_cart)
+{
+ if (m_cart)
+ return m_cart->read_cart(space, offset);
+ else
+ return 0xff;
+}
+
+/*-------------------------------------------------
+ write
+ -------------------------------------------------*/
+
+WRITE8_MEMBER(scv_cart_slot_device::write_cart)
+{
+ if (m_cart)
+ m_cart->write_cart(space, offset, data);
+}
+
+
+/*-------------------------------------------------
+ write_bank
+ -------------------------------------------------*/
+
+WRITE8_MEMBER(scv_cart_slot_device::write_bank)
+{
+ if (m_cart)
+ m_cart->write_bank(space, offset, data);
+}