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-rw-r--r--src/devices/bus/vc4000/slot.c295
1 files changed, 295 insertions, 0 deletions
diff --git a/src/devices/bus/vc4000/slot.c b/src/devices/bus/vc4000/slot.c
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index 00000000000..2c353ef90b6
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+++ b/src/devices/bus/vc4000/slot.c
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+// license:BSD-3-Clause
+// copyright-holders:Fabio Priuli
+/***********************************************************************************************************
+
+ Interton Electronic VC 4000 cart emulation
+ (through slot devices)
+
+ ***********************************************************************************************************/
+
+
+#include "emu.h"
+#include "slot.h"
+
+//**************************************************************************
+// GLOBAL VARIABLES
+//**************************************************************************
+
+const device_type VC4000_CART_SLOT = &device_creator<vc4000_cart_slot_device>;
+
+//**************************************************************************
+// VC4000 Cartridges Interface
+//**************************************************************************
+
+//-------------------------------------------------
+// device_vc4000_cart_interface - constructor
+//-------------------------------------------------
+
+device_vc4000_cart_interface::device_vc4000_cart_interface(const machine_config &mconfig, device_t &device)
+ : device_slot_card_interface(mconfig, device),
+ m_rom(NULL),
+ m_rom_size(0)
+{
+}
+
+
+//-------------------------------------------------
+// ~device_vc4000_cart_interface - destructor
+//-------------------------------------------------
+
+device_vc4000_cart_interface::~device_vc4000_cart_interface()
+{
+}
+
+//-------------------------------------------------
+// rom_alloc - alloc the space for the cart
+//-------------------------------------------------
+
+void device_vc4000_cart_interface::rom_alloc(UINT32 size, const char *tag)
+{
+ if (m_rom == NULL)
+ {
+ m_rom = device().machine().memory().region_alloc(std::string(tag).append(VC4000SLOT_ROM_REGION_TAG).c_str(), size, 1, ENDIANNESS_LITTLE)->base();
+ m_rom_size = size;
+ }
+}
+
+
+//-------------------------------------------------
+// ram_alloc - alloc the space for the ram
+//-------------------------------------------------
+
+void device_vc4000_cart_interface::ram_alloc(UINT32 size)
+{
+ m_ram.resize(size);
+}
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// vc4000_cart_slot_device - constructor
+//-------------------------------------------------
+vc4000_cart_slot_device::vc4000_cart_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, VC4000_CART_SLOT, "Interton VC 4000 Cartridge Slot", tag, owner, clock, "vc4000_cart_slot", __FILE__),
+ device_image_interface(mconfig, *this),
+ device_slot_interface(mconfig, *this),
+ m_type(VC4000_STD)
+{
+}
+
+
+//-------------------------------------------------
+// vc4000_cart_slot_device - destructor
+//-------------------------------------------------
+
+vc4000_cart_slot_device::~vc4000_cart_slot_device()
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void vc4000_cart_slot_device::device_start()
+{
+ m_cart = dynamic_cast<device_vc4000_cart_interface *>(get_card_device());
+}
+
+//-------------------------------------------------
+// device_config_complete - perform any
+// operations now that the configuration is
+// complete
+//-------------------------------------------------
+
+void vc4000_cart_slot_device::device_config_complete()
+{
+ // set brief and instance name
+ update_names();
+}
+
+
+//-------------------------------------------------
+// VC4000 PCB
+//-------------------------------------------------
+
+struct vc4000_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 vc4000_slot slot_list[] =
+{
+ { VC4000_STD, "std" },
+ { VC4000_ROM4K, "rom4k" },
+ { VC4000_RAM1K, "ram1k" },
+ { VC4000_CHESS2, "chess2" }
+};
+
+static int vc4000_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 *vc4000_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 vc4000_cart_slot_device::call_load()
+{
+ if (m_cart)
+ {
+ UINT32 size = (software_entry() == NULL) ? length() : get_software_region_length("rom");
+
+ if (size > 0x1800)
+ {
+ seterror(IMAGE_ERROR_UNSPECIFIED, "Image extends beyond the expected size for a VC4000 cart");
+ return IMAGE_INIT_FAIL;
+ }
+
+ 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 = VC4000_STD;
+ // attempt to identify the non-standard types
+ if (size > 0x1000) // 6k rom + 1k ram - Chess2 only
+ m_type = VC4000_CHESS2;
+ else if (size > 0x0800) // some 4k roms have 1k of mirrored ram (those who don't still work with RAM emulated luckily)
+ m_type = VC4000_RAM1K;
+
+ if (m_type == VC4000_RAM1K || m_type == VC4000_CHESS2)
+ m_cart->ram_alloc(0x400);
+ }
+ else
+ {
+ const char *pcb_name = get_feature("slot");
+ if (pcb_name)
+ m_type = vc4000_get_pcb_id(pcb_name);
+
+ if (get_software_region("ram"))
+ m_cart->ram_alloc(get_software_region_length("ram"));
+ }
+
+ //printf("Type: %s\n", vc4000_get_slot(m_type));
+
+ return IMAGE_INIT_PASS;
+ }
+
+ return IMAGE_INIT_PASS;
+}
+
+
+/*-------------------------------------------------
+ call softlist load
+ -------------------------------------------------*/
+
+bool vc4000_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 vc4000_cart_slot_device::get_default_card_software(std::string &result)
+{
+ if (open_image_file(mconfig().options()))
+ {
+ const char *slot_string = "std";
+ UINT32 size = core_fsize(m_file);
+ int type = VC4000_STD;
+
+ // attempt to identify the non-standard types
+ if (size > 0x1000) // 6k rom + 1k ram - Chess2 only
+ type = VC4000_CHESS2;
+ else if (size > 0x0800) // some 4k roms have 1k of mirrored ram
+ type = VC4000_RAM1K;
+
+ slot_string = vc4000_get_slot(type);
+
+ //printf("type: %s\n", slot_string);
+ clear();
+
+ result.assign(slot_string);
+ return;
+ }
+
+ software_get_default_slot(result, "std");
+}
+
+/*-------------------------------------------------
+ read
+ -------------------------------------------------*/
+
+READ8_MEMBER(vc4000_cart_slot_device::read_rom)
+{
+ if (m_cart)
+ return m_cart->read_rom(space, offset);
+ else
+ return 0xff;
+}
+
+/*-------------------------------------------------
+ read
+ -------------------------------------------------*/
+
+READ8_MEMBER(vc4000_cart_slot_device::extra_rom)
+{
+ if (m_cart)
+ return m_cart->extra_rom(space, offset);
+ else
+ return 0xff;
+}
+
+/*-------------------------------------------------
+ read
+ -------------------------------------------------*/
+
+READ8_MEMBER(vc4000_cart_slot_device::read_ram)
+{
+ if (m_cart)
+ return m_cart->read_ram(space, offset);
+ else
+ return 0xff;
+}
+
+/*-------------------------------------------------
+ write
+ -------------------------------------------------*/
+
+WRITE8_MEMBER(vc4000_cart_slot_device::write_ram)
+{
+ if (m_cart)
+ m_cart->write_ram(space, offset, data);
+}