static void region_post_process(struct rom_load_data *romdata, const struct RomModule *regiondata)
{
int type = ROMREGION_GETTYPE(regiondata);
int datawidth = ROMREGION_GETWIDTH(regiondata) / 8;
int littleendian = ROMREGION_ISLITTLEENDIAN(regiondata);
UINT8 *base;
int i, j;
debugload("+ datawidth=%d little=%d\n", datawidth, littleendian);
/* if this is a CPU region, override with the CPU width and endianness */
if (type >= REGION_CPU1 && type < REGION_CPU1 + MAX_CPU)
{
int cputype = Machine->drv->cpu[type - REGION_CPU1].cpu_type;
if (cputype != 0)
{
datawidth = cputype_databus_width(cputype) / 8;
littleendian = (cputype_endianess(cputype) == CPU_IS_LE);
debugload("+ CPU region #%d: datawidth=%d little=%d\n", type - REGION_CPU1, datawidth, littleendian);
}
}
/* if the region is inverted, do that now */
if (ROMREGION_ISINVERTED(regiondata))
{
debugload("+ Inverting region\n");
for (i = 0, base = romdata->regionbase; i < romdata->regionlength; i++)
*base++ ^= 0xff;
}
/* swap the endianness if we need to */
#ifdef MSB_FIRST
if (datawidth > 1 && littleendian)
#else
if (datawidth > 1 && !littleendian)
#endif
{
debugload("+ Byte swapping region\n");
for (i = 0, base = romdata->regionbase; i < romdata->regionlength; i += datawidth)
{
UINT8 temp[8];
memcpy(temp, base, datawidth);
for (j = datawidth - 1; j >= 0; j--)
*base++ = temp[j];
}
}
}
int cartslot_image_device::load_cartridge(const rom_entry *romrgn, const rom_entry *roment, bool load)
{
const char *region;
const char *type;
UINT32 flags;
offs_t offset, size, read_length, pos = 0, len;
UINT8 *ptr;
UINT8 clear_val;
int datawidth, littleendian, i, j;
device_t *cpu;
astring regiontag;
device().siblingtag(regiontag, ROMREGION_GETTAG(romrgn));
region = regiontag.cstr();
offset = ROM_GETOFFSET(roment);
size = ROM_GETLENGTH(roment);
flags = ROM_GETFLAGS(roment);
ptr = ((UINT8 *) device().machine().root_device().memregion(region)->base()) + offset;
if (load)
{
if (software_entry() == NULL)
{
/* must this be full size */
if (flags & ROM_FULLSIZE)
{
if (length() != size)
return IMAGE_INIT_FAIL;
}
/* read the ROM */
pos = read_length = fread(ptr, size);
/* reset the ROM to the initial point. */
/* eventually, we could add a flag to allow the ROM to continue instead of restarting whenever a new cart region is present */
fseek(0, SEEK_SET);
}
else
{
/* must this be full size */
if (flags & ROM_FULLSIZE)
{
if (get_software_region_length("rom") != size)
return IMAGE_INIT_FAIL;
}
/* read the ROM */
pos = read_length = get_software_region_length("rom");
memcpy(ptr, get_software_region("rom"), read_length);
}
/* do we need to mirror the ROM? */
if (flags & ROM_MIRROR)
{
while(pos < size)
{
len = MIN(read_length, size - pos);
memcpy(ptr + pos, ptr, len);
pos += len;
}
}
/* postprocess this region */
type = regiontag.cstr();
littleendian = ROMREGION_ISLITTLEENDIAN(romrgn);
datawidth = ROMREGION_GETWIDTH(romrgn) / 8;
/* if the region is inverted, do that now */
device_memory_interface *memory;
cpu = device().machine().device(type);
if (cpu!=NULL && cpu->interface(memory))
{
datawidth = cpu->memory().space_config(AS_PROGRAM)->m_databus_width / 8;
littleendian = (cpu->memory().space_config()->m_endianness == ENDIANNESS_LITTLE);
}
/* swap the endianness if we need to */
#ifdef LSB_FIRST
if (datawidth > 1 && !littleendian)
#else
if (datawidth > 1 && littleendian)
#endif
{
for (i = 0; i < size; i += datawidth)
{
UINT8 temp[8];
memcpy(temp, &ptr[i], datawidth);
for (j = datawidth - 1; j >= 0; j--)
ptr[i + j] = temp[datawidth - 1 - j];
}
}
}
/* clear out anything that remains */
if (!(flags & ROM_NOCLEAR))
{
clear_val = (flags & ROM_FILL_FF) ? 0xFF : 0x00;
memset(ptr + pos, clear_val, size - pos);
}
return IMAGE_INIT_PASS;
}
static int load_cartridge(const rom_entry *romrgn, const rom_entry *roment, mame_file *file)
{
UINT32 region, flags;
offs_t offset, length, read_length, pos = 0, len;
UINT8 *ptr;
UINT8 clear_val;
int type, datawidth, littleendian, i, j;
region = ROMREGION_GETTYPE(romrgn);
offset = ROM_GETOFFSET(roment);
length = ROM_GETLENGTH(roment);
flags = ROM_GETFLAGS(roment);
ptr = ((UINT8 *) memory_region(region)) + offset;
if (file)
{
/* must this be full size */
if (flags & ROM_FULLSIZE)
{
if (mame_fsize(file) != length)
return INIT_FAIL;
}
/* read the ROM */
pos = read_length = mame_fread(file, ptr, length);
/* do we need to mirror the ROM? */
if (flags & ROM_MIRROR)
{
while(pos < length)
{
len = MIN(read_length, length - pos);
memcpy(ptr + pos, ptr, len);
pos += len;
}
}
/* postprocess this region */
type = ROMREGION_GETTYPE(romrgn);
littleendian = ROMREGION_ISLITTLEENDIAN(romrgn);
datawidth = ROMREGION_GETWIDTH(romrgn) / 8;
/* if the region is inverted, do that now */
if (type >= REGION_CPU1 && type < REGION_CPU1 + MAX_CPU)
{
int cputype = Machine->drv->cpu[type - REGION_CPU1].cpu_type;
if (cputype != 0)
{
datawidth = cputype_databus_width(cputype, ADDRESS_SPACE_PROGRAM) / 8;
littleendian = (cputype_endianness(cputype) == CPU_IS_LE);
}
}
/* swap the endianness if we need to */
#ifdef LSB_FIRST
if (datawidth > 1 && !littleendian)
#else
if (datawidth > 1 && littleendian)
#endif
{
for (i = 0; i < length; i += datawidth)
{
UINT8 temp[8];
memcpy(temp, &ptr[i], datawidth);
for (j = datawidth - 1; j >= 0; j--)
ptr[i + j] = temp[datawidth - 1 - j];
}
}
}
/* clear out anything that remains */
if (!(flags & ROM_NOCLEAR))
{
clear_val = (flags & ROM_FILL_FF) ? 0xFF : 0x00;
memset(ptr + pos, clear_val, length - pos);
}
return INIT_PASS;
}