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minor cleanup. nw.

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This commit is contained in:
Fabio Priuli 2013-03-06 12:44:03 +00:00
parent 5a0809b0c2
commit da210cf4ab
1 changed files with 41 additions and 43 deletions
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84
src/mess/machine/snescart.c
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@ -750,29 +750,28 @@ DEVICE_IMAGE_LOAD_MEMBER( snes_state,snes_cart )
{ {
int supported_type = 1; int supported_type = 1;
running_machine &machine = image.device().machine(); running_machine &machine = image.device().machine();
snes_state *state = machine.driver_data<snes_state>();
address_space &space = machine.device( "maincpu")->memory().space( AS_PROGRAM ); address_space &space = machine.device( "maincpu")->memory().space( AS_PROGRAM );
int total_blocks, read_blocks, has_bsx_slot = 0, st_bios = 0; int total_blocks, read_blocks, has_bsx_slot = 0, st_bios = 0;
UINT32 offset, int_header_offs; UINT32 offset, int_header_offs;
UINT8 *ROM = state->memregion("cart")->base(); UINT8 *ROM = memregion("cart")->base();
if (image.software_entry() == NULL) if (image.software_entry() == NULL)
state->m_cart_size = image.length(); m_cart_size = image.length();
else else
state->m_cart_size = image.get_software_region_length("rom"); 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, state->m_cart_size); offset = snes_skip_header(image, m_cart_size);
if (image.software_entry() == NULL) if (image.software_entry() == NULL)
{ {
image.fseek(offset, SEEK_SET); image.fseek(offset, SEEK_SET);
image.fread( ROM, state->m_cart_size - offset); image.fread(ROM, m_cart_size - offset);
} }
else else
memcpy(ROM, image.get_software_region("rom") + offset, state->m_cart_size - offset); memcpy(ROM, image.get_software_region("rom") + offset, m_cart_size - offset);
if (SNES_CART_DEBUG) mame_printf_error("size %08X\n", state->m_cart_size - offset); if (SNES_CART_DEBUG) mame_printf_error("size %08X\n", m_cart_size - offset);
/* First, look if the cart is HiROM or LoROM (and set snes_cart accordingly) */ /* 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); int_header_offs = snes_find_hilo_mode(image, ROM, offset, 0);
@ -788,7 +787,7 @@ DEVICE_IMAGE_LOAD_MEMBER( snes_state,snes_cart )
if (ROM[int_header_offs + 0x1a] == 0x33 || ROM[int_header_offs + 0x1a] == 0xff) if (ROM[int_header_offs + 0x1a] == 0x33 || ROM[int_header_offs + 0x1a] == 0xff)
{ {
// BS-X Flash Cart // BS-X Flash Cart
state->m_cart[0].mode = SNES_MODE_BSX; m_cart[0].mode = SNES_MODE_BSX;
} }
} }
} }
@ -813,12 +812,12 @@ DEVICE_IMAGE_LOAD_MEMBER( snes_state,snes_cart )
if (!memcmp(ROM + int_header_offs, "Satellaview BS-X ", 21)) if (!memcmp(ROM + int_header_offs, "Satellaview BS-X ", 21))
{ {
//BS-X Base Cart //BS-X Base Cart
state->m_cart[0].mode = SNES_MODE_BSX; m_cart[0].mode = SNES_MODE_BSX;
// handle RAM // handle RAM
} }
else else
{ {
state->m_cart[0].mode = (int_header_offs ==0x007fc0) ? SNES_MODE_BSLO : SNES_MODE_BSHI; m_cart[0].mode = (int_header_offs ==0x007fc0) ? SNES_MODE_BSLO : SNES_MODE_BSHI;
// handle RAM? // handle RAM?
} }
} }
@ -826,17 +825,17 @@ DEVICE_IMAGE_LOAD_MEMBER( snes_state,snes_cart )
/* Then, detect Sufami Turbo carts */ /* Then, detect Sufami Turbo carts */
if (!memcmp(ROM, "BANDAI SFC-ADX", 14)) if (!memcmp(ROM, "BANDAI SFC-ADX", 14))
{ {
state->m_cart[0].mode = SNES_MODE_ST; m_cart[0].mode = SNES_MODE_ST;
if (!memcmp(ROM + 16, "SFC-ADX BACKUP", 14)) if (!memcmp(ROM + 16, "SFC-ADX BACKUP", 14))
st_bios = 1; st_bios = 1;
} }
if (SNES_CART_DEBUG) mame_printf_error("mode %d\n", state->m_cart[0].mode); if (SNES_CART_DEBUG) mame_printf_error("mode %d\n", m_cart[0].mode);
/* FIXME: Insert crc check here? */ /* FIXME: Insert crc check here? */
/* How many blocks of data are available to be loaded? */ /* How many blocks of data are available to be loaded? */
total_blocks = ((state->m_cart_size - offset) / (state->m_cart[0].mode & 0xa5 ? 0x8000 : 0x10000)); total_blocks = ((m_cart_size - offset) / (m_cart[0].mode & 0xa5 ? 0x8000 : 0x10000));
read_blocks = 0; read_blocks = 0;
if (SNES_CART_DEBUG) mame_printf_error("blocks %d\n", total_blocks); if (SNES_CART_DEBUG) mame_printf_error("blocks %d\n", total_blocks);
@ -852,7 +851,7 @@ DEVICE_IMAGE_LOAD_MEMBER( snes_state,snes_cart )
* This is likely what happens in the real SNES as well, because the unit cannot be aware of the exact * This is likely what happens in the real SNES as well, because the unit cannot be aware of the exact
* size of data in the cart (procedure confirmed by byuu) * size of data in the cart (procedure confirmed by byuu)
*/ */
switch (state->m_cart[0].mode) switch (m_cart[0].mode)
{ {
case SNES_MODE_21: case SNES_MODE_21:
/* HiROM carts load data in banks 0xc0 to 0xff. Each bank is fully mirrored in banks 0x40 to 0x7f /* HiROM carts load data in banks 0xc0 to 0xff. Each bank is fully mirrored in banks 0x40 to 0x7f
@ -1018,7 +1017,7 @@ DEVICE_IMAGE_LOAD_MEMBER( snes_state,snes_cart )
/* not handled yet */ /* not handled yet */
mame_printf_error("This is a BS-X Satellaview image: MESS does not support these yet, sorry.\n"); mame_printf_error("This is a BS-X Satellaview image: MESS does not support these yet, sorry.\n");
/* so treat it like MODE_20 */ /* so treat it like MODE_20 */
state->m_cart[0].mode = SNES_MODE_20; m_cart[0].mode = SNES_MODE_20;
/* and load it as such... */ /* and load it as such... */
default: default:
@ -1081,39 +1080,39 @@ DEVICE_IMAGE_LOAD_MEMBER( snes_state,snes_cart )
/* Find the amount of cart ram (even if we call it sram...) */ /* Find the amount of cart ram (even if we call it sram...) */
if (image.software_entry() == NULL) if (image.software_entry() == NULL)
{ {
if ((state->m_has_addon_chip != HAS_SUPERFX)) if ((m_has_addon_chip != HAS_SUPERFX))
state->m_cart[0].sram = snes_r_bank1(space, 0x00ffd8); m_cart[0].sram = snes_r_bank1(space, 0x00ffd8);
else else
state->m_cart[0].sram = (snes_r_bank1(space, 0x00ffbd) & 0x07); m_cart[0].sram = (snes_r_bank1(space, 0x00ffbd) & 0x07);
if (state->m_cart[0].sram > 0) if (m_cart[0].sram > 0)
{ {
state->m_cart[0].sram = (1024 << state->m_cart[0].sram); m_cart[0].sram = (1024 << m_cart[0].sram);
if (state->m_cart[0].sram > state->m_cart[0].sram_max) if (m_cart[0].sram > m_cart[0].sram_max)
state->m_cart[0].sram = state->m_cart[0].sram_max; m_cart[0].sram = m_cart[0].sram_max;
} }
// printf("size %x\n", state->m_cart[0].sram); // printf("size %x\n", m_cart[0].sram);
} }
else else
{ {
// if we are loading from softlist, take memory length from the xml // if we are loading from softlist, take memory length from the xml
state->m_cart[0].sram = image.get_software_region("nvram") ? image.get_software_region_length("nvram") : 0; m_cart[0].sram = image.get_software_region("nvram") ? image.get_software_region_length("nvram") : 0;
if (state->m_cart[0].sram > 0) if (m_cart[0].sram > 0)
{ {
if (state->m_cart[0].sram > state->m_cart[0].sram_max) if (m_cart[0].sram > m_cart[0].sram_max)
fatalerror("Found more memory than max allowed (found: %x, max: %x), check xml file!\n", state->m_cart[0].sram, state->m_cart[0].sram_max); fatalerror("Found more memory than max allowed (found: %x, max: %x), check xml file!\n", m_cart[0].sram, m_cart[0].sram_max);
} }
// TODO: Eventually sram handlers should point to the allocated cart:sram region! // TODO: Eventually sram handlers should point to the allocated cart:sram region!
// For now, we only use the region as a placeholder to carry size info... // For now, we only use the region as a placeholder to carry size info...
// printf("size %x\n", state->m_cart[0].sram); // printf("size %x\n", m_cart[0].sram);
} }
/* adjust size for very large carts */ /* adjust size for very large carts */
if (state->m_cart[0].mode == SNES_MODE_20 && ((state->m_cart_size - offset) > 0x200000 || state->m_cart[0].sram > (32 * 1024))) if (m_cart[0].mode == SNES_MODE_20 && ((m_cart_size - offset) > 0x200000 || m_cart[0].sram > (32 * 1024)))
state->m_cart[0].small_sram = 1; m_cart[0].small_sram = 1;
else else
state->m_cart[0].small_sram = 0; m_cart[0].small_sram = 0;
/* Log snes_cart information */ /* Log snes_cart information */
snes_cart_log_info(machine, total_blocks, supported_type); snes_cart_log_info(machine, total_blocks, supported_type);
@ -1128,13 +1127,12 @@ DEVICE_IMAGE_LOAD_MEMBER( snes_state,snes_cart )
DEVICE_IMAGE_LOAD_MEMBER( snes_state,sufami_cart ) DEVICE_IMAGE_LOAD_MEMBER( snes_state,sufami_cart )
{ {
running_machine &machine = image.device().machine(); running_machine &machine = image.device().machine();
snes_state *state = machine.driver_data<snes_state>();
int total_blocks, read_blocks; int total_blocks, read_blocks;
int st_bios = 0, slot_id = 0; int st_bios = 0, slot_id = 0;
UINT32 offset, st_data_offset = 0; UINT32 offset, st_data_offset = 0;
UINT8 *ROM = image.device().machine().root_device().memregion(image.device().tag())->base(); UINT8 *ROM = image.device().machine().root_device().memregion(image.device().tag())->base();
snes_ram = state->memregion("maincpu")->base(); snes_ram = memregion("maincpu")->base();
if (strcmp(image.device().tag(), ":slot_a") == 0) if (strcmp(image.device().tag(), ":slot_a") == 0)
{ {
@ -1149,27 +1147,27 @@ DEVICE_IMAGE_LOAD_MEMBER( snes_state,sufami_cart )
} }
if (image.software_entry() == NULL) if (image.software_entry() == NULL)
state->m_cart_size = image.length(); m_cart_size = image.length();
else else
state->m_cart_size = image.get_software_region_length("rom"); 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, state->m_cart_size); offset = snes_skip_header(image, m_cart_size);
if (image.software_entry() == NULL) if (image.software_entry() == NULL)
{ {
image.fseek(offset, SEEK_SET); image.fseek(offset, SEEK_SET);
image.fread( ROM, state->m_cart_size - offset); image.fread(ROM, m_cart_size - offset);
} }
else else
memcpy(ROM, image.get_software_region("rom") + offset, state->m_cart_size - offset); memcpy(ROM, image.get_software_region("rom") + offset, m_cart_size - offset);
if (SNES_CART_DEBUG) mame_printf_error("size %08X\n", state->m_cart_size - offset); if (SNES_CART_DEBUG) mame_printf_error("size %08X\n", m_cart_size - offset);
/* Detect Sufami Turbo carts */ /* Detect Sufami Turbo carts */
if (!memcmp(ROM, "BANDAI SFC-ADX", 14)) if (!memcmp(ROM, "BANDAI SFC-ADX", 14))
{ {
state->m_cart[slot_id].mode = SNES_MODE_ST; m_cart[slot_id].mode = SNES_MODE_ST;
if (!memcmp(ROM + 16, "SFC-ADX BACKUP", 14)) if (!memcmp(ROM + 16, "SFC-ADX BACKUP", 14))
st_bios = 1; st_bios = 1;
} }
@ -1190,7 +1188,7 @@ DEVICE_IMAGE_LOAD_MEMBER( snes_state,sufami_cart )
/* FIXME: Insert crc check here? */ /* FIXME: Insert crc check here? */
/* How many blocks of data are available to be loaded? */ /* How many blocks of data are available to be loaded? */
total_blocks = (state->m_cart_size - offset) / 0x8000; total_blocks = (m_cart_size - offset) / 0x8000;
read_blocks = 0; read_blocks = 0;
if (SNES_CART_DEBUG) if (SNES_CART_DEBUG)
@ -1223,7 +1221,7 @@ DEVICE_IMAGE_LOAD_MEMBER( snes_state,sufami_cart )
sufami_load_sram(machine, image.device().tag()); sufami_load_sram(machine, image.device().tag());
state->m_cart[slot_id].slot_in_use = 1; // aknowledge the cart in this slot, for saving sram at exit m_cart[slot_id].slot_in_use = 1; // aknowledge the cart in this slot, for saving sram at exit
auto_free(image.device().machine(), ROM); auto_free(image.device().machine(), ROM);