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NES: Expose SRAM load/save functions

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I needed it to debug something and we might as well keep it.
This commit is contained in:
Alex Duchesne 2024-07-21 12:04:09 -04:00
parent 35651407bb
commit e38f3eee2f
2 changed files with 25 additions and 25 deletions
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47
retro-core/components/nofrendo/nes/rom.c
View File

@ -27,42 +27,39 @@
static rom_t rom;
#ifdef USE_SRAM_FILE
/* Save battery-backed RAM */
static void rom_savesram(void)
void rom_savesram(const char *filename)
{
char fn[sizeof(rom.filename)+8];
FILE *fp;
if ((rom.flags & ROM_FLAG_BATTERY) && rom.prg_ram_banks > 0)
if (!(rom.flags & ROM_FLAG_BATTERY) || rom.prg_ram_banks < 1)
{
if ((fp = fopen(strcat(strcpy(fn, rom.filename), ".sav"), "wb")))
{
fwrite(rom.prg_ram, ROM_PRG_BANK_SIZE, rom.prg_ram_banks, fp);
fclose(fp);
MESSAGE_INFO("ROM: Wrote battery RAM to %s.\n", fn);
}
MESSAGE_ERROR("ROM: Game has no battery-backed SRAM!\n");
return;
}
FILE *fp = fopen(filename, "wb");
if (fp)
{
fwrite(rom.prg_ram, ROM_PRG_BANK_SIZE, rom.prg_ram_banks, fp);
fclose(fp);
MESSAGE_INFO("ROM: Wrote battery RAM to %s.\n", filename);
}
}
/* Load battery-backed RAM from disk */
static void rom_loadsram(void)
void rom_loadsram(const char *filename)
{
char fn[sizeof(rom.filename)+8];
FILE *fp;
if ((rom.flags & ROM_FLAG_BATTERY) && rom.prg_ram_banks > 0)
if (!(rom.flags & ROM_FLAG_BATTERY) || rom.prg_ram_banks < 1)
{
if ((fp = fopen(strcat(strcpy(fn, rom.filename), ".sav"), "rb")))
{
fread(rom.prg_ram, ROM_PRG_BANK_SIZE, rom.prg_ram_banks, fp);
fclose(fp);
MESSAGE_INFO("ROM: Read battery RAM from %s.\n", fn);
}
MESSAGE_ERROR("ROM: Game has no battery-backed SRAM!\n");
return;
}
FILE *fp = fopen(filename, "rb");
if (fp)
{
fread(rom.prg_ram, ROM_PRG_BANK_SIZE, rom.prg_ram_banks, fp);
fclose(fp);
MESSAGE_INFO("ROM: Read battery RAM from %s.\n", filename);
}
}
#endif
/* Load a ROM from a memory buffer */
rom_t *rom_loadmem(uint8 *data, size_t size)

3
retro-core/components/nofrendo/nes/rom.h
View File

@ -103,3 +103,6 @@ typedef struct
rom_t *rom_loadfile(const char *filename);
rom_t *rom_loadmem(uint8 *data, size_t size);
void rom_free(void);
void rom_savesram(const char *filename);
void rom_loadsram(const char *filename);