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another minor cleanup. nw.

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This commit is contained in:
Fabio Priuli 2013-03-09 07:46:16 +00:00
parent c17d9153d6
commit ad66e4521e
1 changed files with 33 additions and 34 deletions
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67
src/mess/machine/snescart.c
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@ -297,7 +297,7 @@ static UINT32 snes_skip_header( device_image_interface &image, UINT32 snes_rom_s
/* Check for a header (512 bytes) */
if (image.software_entry() == NULL)
image.fread( header, 512);
image.fread(header, 512);
else
memcpy(header, image.get_software_region("rom"), 512);
@ -330,7 +330,7 @@ static UINT32 snes_skip_header( device_image_interface &image, UINT32 snes_rom_s
/* This determines if a cart is in Mode 20, 21, 22 or 25; sets state->m_cart[0].mode and
state->m_cart[0].sram_max accordingly; and returns the offset of the internal header
(needed to detect BSX and ST carts) */
static UINT32 snes_find_hilo_mode( device_image_interface &image, UINT8 *buffer, UINT32 offset, int cartid )
static UINT32 snes_find_hilo_mode( device_image_interface &image, UINT8 *buffer, UINT32 len, UINT32 offset, int cartid )
{
snes_state *state = image.device().machine().driver_data<snes_state>();
UINT8 valid_mode20, valid_mode21, valid_mode25;
@ -339,7 +339,7 @@ static UINT32 snes_find_hilo_mode( device_image_interface &image, UINT8 *buffer,
/* Now to determine if this is a lo-ROM, a hi-ROM or an extended lo/hi-ROM */
valid_mode20 = snes_validate_infoblock(buffer, 0x007fc0);
valid_mode21 = snes_validate_infoblock(buffer, 0x00ffc0);
valid_mode25 = snes_validate_infoblock(buffer, 0x40ffc0);
valid_mode25 = (len > 0x40ffc0) ? snes_validate_infoblock(buffer, 0x40ffc0) : 0;
/* Images larger than 32mbits are likely ExHiRom */
if (valid_mode25)
@ -561,14 +561,14 @@ static int snes_find_addon_chip( running_machine &machine, UINT8 *buffer, UINT32
return supported_type;
}
static void snes_cart_log_info( running_machine &machine, UINT8* ROM, int supported )
static void snes_cart_log_info( running_machine &machine, UINT8* ROM, UINT32 len, int supported )
{
snes_state *state = machine.driver_data<snes_state>();
device_image_interface *image = dynamic_cast<device_image_interface *>(machine.device("cart"));
char title[21], rom_id[4], company_id[2];
int i, company, has_ram = 0, has_sram = 0;
UINT32 offset = snes_skip_header(*image, state->m_cart_size);
UINT32 hilo_mode = snes_find_hilo_mode(*image, ROM, offset, 0);
UINT32 hilo_mode = snes_find_hilo_mode(*image, ROM, len, offset, 0);
/* Company */
for (i = 0; i < 2; i++)
@ -645,43 +645,44 @@ DEVICE_IMAGE_LOAD_MEMBER( snes_state,snes_cart )
int supported_type = 1;
int has_bsx_slot = 0, st_bios = 0;
UINT32 offset, int_header_offs;
UINT8 *ROM = memregion("cart")->base();
if (image.software_entry() == NULL)
m_cart_size = image.length();
else
m_cart_size = image.get_software_region_length("rom");
/* Check for a header (512 bytes), and skip it if found */
// Check for a header (512 bytes), and skip it if found
offset = snes_skip_header(image, m_cart_size);
// Allocate rom pointer
m_cart[0].m_rom_size = m_cart_size - offset;
m_cart[0].m_rom = auto_alloc_array_clear(machine(), UINT8, m_cart[0].m_rom_size);
if (image.software_entry() == NULL)
{
image.fseek(offset, SEEK_SET);
image.fread(ROM, m_cart_size - offset);
image.fread(m_cart[0].m_rom, m_cart_size - offset);
}
else
memcpy(ROM, image.get_software_region("rom") + offset, m_cart_size - offset);
memcpy(m_cart[0].m_rom, image.get_software_region("rom") + offset, m_cart_size - offset);
if (SNES_CART_DEBUG) mame_printf_error("size %08X\n", m_cart_size - offset);
m_cart[0].m_rom_size = m_cart_size;
m_cart[0].m_rom = auto_alloc_array_clear(machine(), UINT8, m_cart[0].m_rom_size);
memcpy(m_cart[0].m_rom, ROM, m_cart[0].m_rom_size - offset);
// Setup the bank map to handle mirroring of ROM up to 8MB of accessible memory
rom_map_setup(m_cart[0].m_rom_size);
/* First, look if the cart is HiROM or LoROM (and set snes_cart accordingly) */
int_header_offs = snes_find_hilo_mode(image, ROM, offset, 0);
// Check if the cart is HiROM or LoROM (and set variables accordingly)
int_header_offs = snes_find_hilo_mode(image, m_cart[0].m_rom, m_cart[0].m_rom_size, offset, 0);
/* Then, detect BS-X carts */
// Detect presence of BS-X Flash Cart
if ((ROM[int_header_offs + 0x13] == 0x00 || ROM[int_header_offs + 0x13] == 0xff) &&
ROM[int_header_offs + 0x14] == 0x00)
// Detect BS-X carts:
// 1. Detect BS-X Flash Cart
if ((m_cart[0].m_rom[int_header_offs + 0x13] == 0x00 || m_cart[0].m_rom[int_header_offs + 0x13] == 0xff) &&
m_cart[0].m_rom[int_header_offs + 0x14] == 0x00)
{
UINT8 n15 = ROM[int_header_offs + 0x15];
UINT8 n15 = m_cart[0].m_rom[int_header_offs + 0x15];
if (n15 == 0x00 || n15 == 0x80 || n15 == 0x84 || n15 == 0x9c || n15 == 0xbc || n15 == 0xfc)
{
if (ROM[int_header_offs + 0x1a] == 0x33 || ROM[int_header_offs + 0x1a] == 0xff)
if (m_cart[0].m_rom[int_header_offs + 0x1a] == 0x33 || m_cart[0].m_rom[int_header_offs + 0x1a] == 0xff)
{
// BS-X Flash Cart
mame_printf_error("This is a game with BS-X slot: MESS does not support these yet, sorry.\n");
@ -690,14 +691,14 @@ DEVICE_IMAGE_LOAD_MEMBER( snes_state,snes_cart )
}
}
// Detect presence of BS-X flash cartridge connector
if ((ROM[int_header_offs - 14] == 'Z') && (ROM[int_header_offs - 11] == 'J'))
// 2. Detect presence of BS-X flash cartridge connector
if ((m_cart[0].m_rom[int_header_offs - 14] == 'Z') && (m_cart[0].m_rom[int_header_offs - 11] == 'J'))
{
UINT8 n13 = ROM[int_header_offs - 13];
UINT8 n13 = m_cart[0].m_rom[int_header_offs - 13];
if ((n13 >= 'A' && n13 <= 'Z') || (n13 >= '0' && n13 <= '9'))
{
if (ROM[int_header_offs + 0x1a] == 0x33 ||
(ROM[int_header_offs - 10] == 0x00 && ROM[int_header_offs - 4] == 0x00))
if (m_cart[0].m_rom[int_header_offs + 0x1a] == 0x33 ||
(m_cart[0].m_rom[int_header_offs - 10] == 0x00 && m_cart[0].m_rom[int_header_offs - 4] == 0x00))
{
has_bsx_slot = 1;
}
@ -708,24 +709,22 @@ DEVICE_IMAGE_LOAD_MEMBER( snes_state,snes_cart )
if (has_bsx_slot)
{
mame_printf_error("This is a game with BS-X slot: MESS does not support these yet, sorry.\n");
if (!memcmp(ROM + int_header_offs, "Satellaview BS-X ", 21))
if (!memcmp(m_cart[0].m_rom + int_header_offs, "Satellaview BS-X ", 21))
{
//BS-X Base Cart
m_cart[0].mode = SNES_MODE_20; //SNES_MODE_BSX;
// handle RAM
}
else
{
m_cart[0].mode = (int_header_offs == 0x007fc0) ? SNES_MODE_20 : SNES_MODE_21; //SNES_MODE_BSLO : SNES_MODE_BSHI;
// handle RAM?
}
}
/* Then, detect Sufami Turbo carts */
if (!memcmp(ROM, "BANDAI SFC-ADX", 14))
if (!memcmp(m_cart[0].m_rom, "BANDAI SFC-ADX", 14))
{
m_cart[0].mode = SNES_MODE_ST;
if (!memcmp(ROM + 16, "SFC-ADX BACKUP", 14))
if (!memcmp(m_cart[0].m_rom + 16, "SFC-ADX BACKUP", 14))
st_bios = 1;
}
if (st_bios)
@ -741,7 +740,7 @@ DEVICE_IMAGE_LOAD_MEMBER( snes_state,snes_cart )
if (SNES_CART_DEBUG) mame_printf_error("mode %d\n", m_cart[0].mode);
/* Detect special chips */
supported_type = snes_find_addon_chip(machine(), ROM, int_header_offs);
supported_type = snes_find_addon_chip(machine(), m_cart[0].m_rom, int_header_offs);
/* Find the amount of cart ram */
m_cart[0].m_nvram_size = 0;
@ -749,9 +748,9 @@ DEVICE_IMAGE_LOAD_MEMBER( snes_state,snes_cart )
{
UINT32 nvram_size;
if ((m_has_addon_chip != HAS_SUPERFX))
nvram_size = ROM[int_header_offs + 0x18];
nvram_size = m_cart[0].m_rom[int_header_offs + 0x18];
else
nvram_size = (ROM[0x007fbd] & 0x07);
nvram_size = (m_cart[0].m_rom[0x007fbd] & 0x07);
if (nvram_size > 0)
{
@ -782,7 +781,7 @@ DEVICE_IMAGE_LOAD_MEMBER( snes_state,snes_cart )
m_cart[0].m_nvram = auto_alloc_array_clear(machine(), UINT8, m_cart[0].m_nvram_size);
/* Log snes_cart information */
snes_cart_log_info(machine(), ROM, supported_type);
snes_cart_log_info(machine(), m_cart[0].m_rom, m_cart[0].m_rom_size, supported_type);
/* Load SRAM */
if (m_cart[0].m_nvram_size > 0)