RaySollium99/picodrive
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Merge from libretro/master:7ff457f for repo synchronization

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kub 2022-04-19 23:58:59 +02:00
parent 45d0add214
commit a5085db3ea
19 changed files with 1015 additions and 311 deletions
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76
pico/cart.c
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@ -738,65 +738,75 @@ static unsigned char *PicoCartAlloc(int filesize, int is_sms)
return rom;
}
int PicoCartLoad(pm_file *f,unsigned char **prom,unsigned int *psize,int is_sms)
int PicoCartLoad(pm_file *f, const unsigned char *rom, unsigned int romsize,
unsigned char **prom, unsigned int *psize, int is_sms)
{
unsigned char *rom;
unsigned char *rom_data = NULL;
int size, bytes_read;
if (f == NULL)
if (!f && !rom)
return 1;
size = f->size;
if (!rom)
size = f->size;
else
size = romsize;
if (size <= 0) return 1;
size = (size+3)&~3; // Round up to a multiple of 4
// Allocate space for the rom plus padding
rom = PicoCartAlloc(size, is_sms);
if (rom == NULL) {
rom_data = PicoCartAlloc(size, is_sms);
if (rom_data == NULL) {
elprintf(EL_STATUS, "out of memory (wanted %i)", size);
return 2;
}
if (PicoCartLoadProgressCB != NULL)
{
// read ROM in blocks, just for fun
int ret;
unsigned char *p = rom;
bytes_read=0;
do
if (!rom) {
if (PicoCartLoadProgressCB != NULL)
{
int todo = size - bytes_read;
if (todo > 256*1024) todo = 256*1024;
ret = pm_read(p,todo,f);
bytes_read += ret;
p += ret;
PicoCartLoadProgressCB(bytes_read * 100LL / size);
// read ROM in blocks, just for fun
int ret;
unsigned char *p = rom_data;
bytes_read=0;
do
{
int todo = size - bytes_read;
if (todo > 256*1024) todo = 256*1024;
ret = pm_read(p,todo,f);
bytes_read += ret;
p += ret;
PicoCartLoadProgressCB(bytes_read * 100LL / size);
}
while (ret > 0);
}
else
bytes_read = pm_read(rom_data,size,f); // Load up the rom
if (bytes_read <= 0) {
elprintf(EL_STATUS, "read failed");
plat_munmap(rom_data, rom_alloc_size);
return 3;
}
while (ret > 0);
}
else
bytes_read = pm_read(rom,size,f); // Load up the rom
if (bytes_read <= 0) {
elprintf(EL_STATUS, "read failed");
plat_munmap(rom, rom_alloc_size);
return 3;
}
memcpy(rom_data, rom, romsize);
if (!is_sms)
{
// maybe we are loading MegaCD BIOS?
if (!(PicoIn.AHW & PAHW_MCD) && size == 0x20000 && (!strncmp((char *)rom+0x124, "BOOT", 4) ||
!strncmp((char *)rom+0x128, "BOOT", 4))) {
if (!(PicoIn.AHW & PAHW_MCD) && size == 0x20000 && (!strncmp((char *)rom_data+0x124, "BOOT", 4) ||
!strncmp((char *)rom_data+0x128, "BOOT", 4))) {
PicoIn.AHW |= PAHW_MCD;
}
// Check for SMD:
if (size >= 0x4200 && (size&0x3fff) == 0x200 &&
((rom[0x2280] == 'S' && rom[0x280] == 'E') || (rom[0x280] == 'S' && rom[0x2281] == 'E'))) {
((rom_data[0x2280] == 'S' && rom_data[0x280] == 'E') || (rom_data[0x280] == 'S' && rom_data[0x2281] == 'E'))) {
elprintf(EL_STATUS, "SMD format detected.");
DecodeSmd(rom,size); size-=0x200; // Decode and byteswap SMD
DecodeSmd(rom_data,size); size-=0x200; // Decode and byteswap SMD
}
else Byteswap(rom, rom, size); // Just byteswap
else Byteswap(rom_data, rom_data, size); // Just byteswap
}
else
{
@ -804,11 +814,11 @@ int PicoCartLoad(pm_file *f,unsigned char **prom,unsigned int *psize,int is_sms)
elprintf(EL_STATUS, "SMD format detected.");
// at least here it's not interleaved
size -= 0x200;
memmove(rom, rom + 0x200, size);
memmove(rom_data, rom_data + 0x200, size);
}
}
if (prom) *prom = rom;
if (prom) *prom = rom_data;
if (psize) *psize = size;
return 0;