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add primary megadrive memory access, allow get cheevos.

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This commit is contained in:
David Skywalker 2016-03-11 00:56:34 +01:00
parent dfafb96d90
commit c3e69f81d8
1 changed files with 48 additions and 22 deletions
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70
platform/libretro/libretro.c
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@ -983,38 +983,64 @@ unsigned retro_get_region(void)
return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
}
void *retro_get_memory_data(unsigned id)
void *retro_get_memory_data(unsigned type)
{
if (id != RETRO_MEMORY_SAVE_RAM)
return NULL;
uint8_t* data;
if (PicoAHW & PAHW_MCD)
return Pico_mcd->bram;
else
return SRam.data;
switch(type)
{
case RETRO_MEMORY_SAVE_RAM:
if (PicoAHW & PAHW_MCD)
data = Pico_mcd->bram;
else
data = SRam.data;
break;
case RETRO_MEMORY_SYSTEM_RAM:
if (PicoAHW & PAHW_SMS)
data = Pico.vramb;
else
data = Pico.ram;
break;
default:
data = NULL;
break;
}
return data;
}
size_t retro_get_memory_size(unsigned id)
size_t retro_get_memory_size(unsigned type)
{
unsigned int i;
int sum;
switch(type)
{
case RETRO_MEMORY_SAVE_RAM:
if (PicoAHW & PAHW_MCD)
// bram
return 0x2000;
if (id != RETRO_MEMORY_SAVE_RAM)
return 0;
if (Pico.m.frame_count == 0)
return SRam.size;
if (PicoAHW & PAHW_MCD)
// bram
return 0x2000;
// if game doesn't write to sram, don't report it to
// libretro so that RA doesn't write out zeroed .srm
for (i = 0, sum = 0; i < SRam.size; i++)
sum |= SRam.data[i];
if (Pico.m.frame_count == 0)
return SRam.size;
// if game doesn't write to sram, don't report it to
// libretro so that RA doesn't write out zeroed .srm
for (i = 0, sum = 0; i < SRam.size; i++)
sum |= SRam.data[i];
return (sum != 0) ? SRam.size : 0;
return (sum != 0) ? SRam.size : 0;
case RETRO_MEMORY_SYSTEM_RAM:
if (PicoAHW & PAHW_SMS)
return sizeof(Pico.vramb);
else
return sizeof(Pico.ram);
default:
return 0;
}
}
void retro_reset(void)