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-rw-r--r--src/devices/bus/odyssey2/slot.c278
1 files changed, 278 insertions, 0 deletions
diff --git a/src/devices/bus/odyssey2/slot.c b/src/devices/bus/odyssey2/slot.c
new file mode 100644
index 00000000000..72262afe7ac
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+++ b/src/devices/bus/odyssey2/slot.c
@@ -0,0 +1,278 @@
+// license:BSD-3-Clause
+// copyright-holders:Fabio Priuli
+/***********************************************************************************************************
+
+ Magnavox Odyssey 2 cart emulation
+ (through slot devices)
+
+ ***********************************************************************************************************/
+
+
+#include "emu.h"
+#include "slot.h"
+
+//**************************************************************************
+// GLOBAL VARIABLES
+//**************************************************************************
+
+const device_type O2_CART_SLOT = &device_creator<o2_cart_slot_device>;
+
+//**************************************************************************
+// Odyssey 2 Cartridges Interface
+//**************************************************************************
+
+//-------------------------------------------------
+// device_o2_cart_interface - constructor
+//-------------------------------------------------
+
+device_o2_cart_interface::device_o2_cart_interface(const machine_config &mconfig, device_t &device)
+ : device_slot_card_interface(mconfig, device),
+ m_rom(NULL),
+ m_rom_size(0)
+{
+}
+
+
+//-------------------------------------------------
+// ~device_o2_cart_interface - destructor
+//-------------------------------------------------
+
+device_o2_cart_interface::~device_o2_cart_interface()
+{
+}
+
+//-------------------------------------------------
+// rom_alloc - alloc the space for the cart
+//-------------------------------------------------
+
+void device_o2_cart_interface::rom_alloc(UINT32 size, const char *tag)
+{
+ if (m_rom == NULL)
+ {
+ m_rom = device().machine().memory().region_alloc(std::string(tag).append(O2SLOT_ROM_REGION_TAG).c_str(), size, 1, ENDIANNESS_LITTLE)->base();
+ m_rom_size = size;
+ }
+}
+
+
+//-------------------------------------------------
+// ram_alloc - alloc the space for the ram
+//-------------------------------------------------
+
+void device_o2_cart_interface::ram_alloc(UINT32 size)
+{
+ m_ram.resize(size);
+}
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// o2_cart_slot_device - constructor
+//-------------------------------------------------
+o2_cart_slot_device::o2_cart_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, O2_CART_SLOT, "Odyssey 2 Cartridge Slot", tag, owner, clock, "o2_cart_slot", __FILE__),
+ device_image_interface(mconfig, *this),
+ device_slot_interface(mconfig, *this),
+ m_type(O2_STD)
+{
+}
+
+
+//-------------------------------------------------
+// o2_cart_slot_device - destructor
+//-------------------------------------------------
+
+o2_cart_slot_device::~o2_cart_slot_device()
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void o2_cart_slot_device::device_start()
+{
+ m_cart = dynamic_cast<device_o2_cart_interface *>(get_card_device());
+}
+
+//-------------------------------------------------
+// device_config_complete - perform any
+// operations now that the configuration is
+// complete
+//-------------------------------------------------
+
+void o2_cart_slot_device::device_config_complete()
+{
+ // set brief and instance name
+ update_names();
+}
+
+
+//-------------------------------------------------
+// O2 PCB
+//-------------------------------------------------
+
+struct o2_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 o2_slot slot_list[] =
+{
+ { O2_STD, "o2_rom" },
+ { O2_ROM12, "o2_rom12" },
+ { O2_ROM16, "o2_rom16" },
+ { O2_CHESS, "o2_chess" },
+ { O2_VOICE, "o2_voice" }
+};
+
+static int o2_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 *o2_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 "o2_rom";
+}
+
+
+/*-------------------------------------------------
+ call load
+ -------------------------------------------------*/
+
+bool o2_cart_slot_device::call_load()
+{
+ if (m_cart)
+ {
+ UINT32 size = (software_entry() == NULL) ? length() : get_software_region_length("rom");
+ m_cart->rom_alloc(size, tag());
+
+ if (software_entry() == NULL)
+ fread(m_cart->get_rom_base(), size);
+ else
+ memcpy(m_cart->get_rom_base(), get_software_region("rom"), size);
+
+ if (software_entry() == NULL)
+ {
+ m_type = O2_STD;
+ if (size == 12288)
+ m_type = O2_ROM12;
+ if (size == 16384)
+ m_type = O2_ROM16;
+ }
+ else
+ {
+ const char *pcb_name = get_feature("slot");
+ if (pcb_name)
+ m_type = o2_get_pcb_id(pcb_name);
+ }
+
+ //printf("Type: %s\n", o2_get_slot(m_type));
+
+ return IMAGE_INIT_PASS;
+ }
+
+ return IMAGE_INIT_PASS;
+}
+
+
+/*-------------------------------------------------
+ call softlist load
+ -------------------------------------------------*/
+
+bool o2_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 o2_cart_slot_device::get_default_card_software(std::string &result)
+{
+ if (open_image_file(mconfig().options()))
+ {
+ const char *slot_string = "o2_rom";
+ UINT32 size = core_fsize(m_file);
+ int type = O2_STD;
+
+ if (size == 12288)
+ type = O2_ROM12;
+ if (size == 16384)
+ type = O2_ROM16;
+
+ slot_string = o2_get_slot(type);
+
+ //printf("type: %s\n", slot_string);
+ clear();
+
+ result.assign(slot_string);
+ return;
+ }
+
+ software_get_default_slot(result, "o2_rom");
+}
+
+/*-------------------------------------------------
+ read_rom**
+ -------------------------------------------------*/
+
+READ8_MEMBER(o2_cart_slot_device::read_rom04)
+{
+ if (m_cart)
+ return m_cart->read_rom04(space, offset);
+ else
+ return 0xff;
+}
+
+READ8_MEMBER(o2_cart_slot_device::read_rom0c)
+{
+ if (m_cart)
+ return m_cart->read_rom0c(space, offset);
+ else
+ return 0xff;
+}
+
+/*-------------------------------------------------
+ io_write
+ -------------------------------------------------*/
+
+WRITE8_MEMBER(o2_cart_slot_device::io_write)
+{
+ if (m_cart)
+ m_cart->io_write(space, offset, data);
+}
+
+
+#include "bus/odyssey2/rom.h"
+#include "bus/odyssey2/chess.h"
+#include "bus/odyssey2/voice.h"
+
+SLOT_INTERFACE_START(o2_cart)
+ SLOT_INTERFACE_INTERNAL("o2_rom", O2_ROM_STD)
+ SLOT_INTERFACE_INTERNAL("o2_rom12", O2_ROM_12K)
+ SLOT_INTERFACE_INTERNAL("o2_rom16", O2_ROM_16K)
+ SLOT_INTERFACE_INTERNAL("o2_chess", O2_ROM_CHESS)
+ SLOT_INTERFACE_INTERNAL("o2_voice", O2_ROM_VOICE)
+SLOT_INTERFACE_END