diff options
Diffstat (limited to 'src/emu/bus/crvision/slot.c')
-rw-r--r-- | src/emu/bus/crvision/slot.c | 296 |
1 files changed, 296 insertions, 0 deletions
diff --git a/src/emu/bus/crvision/slot.c b/src/emu/bus/crvision/slot.c new file mode 100644 index 00000000000..18bcab83019 --- /dev/null +++ b/src/emu/bus/crvision/slot.c @@ -0,0 +1,296 @@ +/*********************************************************************************************************** + + V-Tech CreatiVision cart emulation + (through slot devices) + + ***********************************************************************************************************/ + + +#include "emu.h" +#include "slot.h" + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + +const device_type CRVISION_CART_SLOT = &device_creator<crvision_cart_slot_device>; + +//************************************************************************** +// CreatiVision Cartridges Interface +//************************************************************************** + +//------------------------------------------------- +// device_crvision_cart_interface - constructor +//------------------------------------------------- + +device_crvision_cart_interface::device_crvision_cart_interface(const machine_config &mconfig, device_t &device) + : device_slot_card_interface(mconfig, device), + m_rom(NULL), + m_rom_size(0) +{ +} + + +//------------------------------------------------- +// ~device_crvision_cart_interface - destructor +//------------------------------------------------- + +device_crvision_cart_interface::~device_crvision_cart_interface() +{ +} + +//------------------------------------------------- +// rom_alloc - alloc the space for the cart +//------------------------------------------------- + +void device_crvision_cart_interface::rom_alloc(UINT32 size, const char *tag) +{ + if (m_rom == NULL) + { + astring tempstring(tag); + tempstring.cat(CRVSLOT_ROM_REGION_TAG); + m_rom = device().machine().memory().region_alloc(tempstring, size, 1, ENDIANNESS_LITTLE)->base(); + m_rom_size = size; + } +} + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// crvision_cart_slot_device - constructor +//------------------------------------------------- +crvision_cart_slot_device::crvision_cart_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, CRVISION_CART_SLOT, "APF Cartridge Slot", tag, owner, clock, "crvision_cart_slot", __FILE__), + device_image_interface(mconfig, *this), + device_slot_interface(mconfig, *this), + m_type(CRV_4K) +{ +} + + +//------------------------------------------------- +// crvision_cart_slot_device - destructor +//------------------------------------------------- + +crvision_cart_slot_device::~crvision_cart_slot_device() +{ +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void crvision_cart_slot_device::device_start() +{ + m_cart = dynamic_cast<device_crvision_cart_interface *>(get_card_device()); +} + +//------------------------------------------------- +// device_config_complete - perform any +// operations now that the configuration is +// complete +//------------------------------------------------- + +void crvision_cart_slot_device::device_config_complete() +{ + // set brief and instance name + update_names(); +} + + +//------------------------------------------------- +// APF PCB +//------------------------------------------------- + +struct crvision_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 crvision_slot slot_list[] = +{ + { CRV_4K, "crv_rom4k" }, + { CRV_6K, "crv_rom6k" }, + { CRV_8K, "crv_rom8k" }, + { CRV_10K, "crv_rom10k" }, + { CRV_12K, "crv_rom12k" }, + { CRV_16K, "crv_rom16k" }, + { CRV_18K, "crv_rom18k" } +}; + +static int crvision_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 *crvision_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 "crv_rom4k"; +} + + +/*------------------------------------------------- + call load + -------------------------------------------------*/ + +bool crvision_cart_slot_device::call_load() +{ + if (m_cart) + { + UINT32 size = (software_entry() == NULL) ? length() : get_software_region_length("rom"); + + if (size > 0x4800) + { + seterror(IMAGE_ERROR_UNSPECIFIED, "Image extends beyond the expected size for an APF 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 = CRV_4K; + + switch (size) + { + case 0x4800: + m_type = CRV_18K; + break; + case 0x4000: + m_type = CRV_16K; + break; + case 0x3000: + m_type = CRV_12K; + break; + case 0x2800: + m_type = CRV_10K; + break; + case 0x2000: + m_type = CRV_8K; + break; + case 0x1800: + m_type = CRV_6K; + break; + case 0x1000: + default: + break; + } + } + else + { + const char *pcb_name = get_feature("slot"); + if (pcb_name) + m_type = crvision_get_pcb_id(pcb_name); + } + + printf("Type: %s\n", crvision_get_slot(m_type)); + + return IMAGE_INIT_PASS; + } + + return IMAGE_INIT_PASS; +} + + +/*------------------------------------------------- + call softlist load + -------------------------------------------------*/ + +bool crvision_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 crvision_cart_slot_device::get_default_card_software(astring &result) +{ + if (open_image_file(mconfig().options())) + { + const char *slot_string = "crv_rom4k"; + UINT32 size = core_fsize(m_file); + int type = CRV_4K; + + switch (size) + { + case 0x4800: + type = CRV_18K; + break; + case 0x4000: + type = CRV_16K; + break; + case 0x3000: + type = CRV_12K; + break; + case 0x2800: + type = CRV_10K; + break; + case 0x2000: + type = CRV_8K; + break; + case 0x1800: + type = CRV_6K; + break; + case 0x1000: + default: + break; + } + + slot_string = crvision_get_slot(type); + + //printf("type: %s\n", slot_string); + clear(); + + result.cpy(slot_string); + return; + } + + software_get_default_slot(result, "crv_rom4k"); +} + +/*------------------------------------------------- + read_rom + -------------------------------------------------*/ + +READ8_MEMBER(crvision_cart_slot_device::read_rom40) +{ + if (m_cart) + return m_cart->read_rom40(space, offset); + else + return 0xff; +} + +READ8_MEMBER(crvision_cart_slot_device::read_rom80) +{ + if (m_cart) + return m_cart->read_rom80(space, offset); + else + return 0xff; +} + |