RaySollium99/picodrive
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ISO loading, menus, LEDs

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@16 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-01-08 21:17:08 +00:00
parent d0d47c5be3
commit bf098bc532
15 changed files with 914 additions and 295 deletions
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38
Pico/Cart.c
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@ -57,18 +57,21 @@ static int DecodeSmd(unsigned char *data,int len)
return 0;
}
static unsigned char *cd_realloc(void *old, int filesize)
{
unsigned char *rom;
dprintf("sizeof(mcd_state): %i", sizeof(mcd_state));
rom=realloc(old, sizeof(mcd_state));
if (rom) memset(rom+0x20000, 0, sizeof(mcd_state)-0x20000);
return rom;
}
static unsigned char *PicoCartAlloc(int filesize)
{
int alloc_size;
unsigned char *rom;
if (PicoMCD & 1) {
dprintf("sizeof(mcd_state): %i", sizeof(mcd_state));
if (filesize > 0x20000) return NULL; // invalid BIOS
rom=(unsigned char *)malloc(sizeof(mcd_state));
if (rom) memset(rom, 0, sizeof(mcd_state));
return rom;
}
if (PicoMCD & 1) return cd_realloc(NULL, filesize);
alloc_size=filesize+0x7ffff;
if((filesize&0x3fff)==0x200) alloc_size-=0x200;
@ -90,19 +93,19 @@ int PicoCartLoad(FILE *f,unsigned char **prom,unsigned int *psize)
fseek(f,0,SEEK_END); size=ftell(f); fseek(f,0,SEEK_SET);
if (size <= 0) return 1;
if (PicoMCD & 1) {
if (size > 0x20000) return 1; // invalid BIOS
size = 0xe0000;
} else {
size=(size+3)&~3; // Round up to a multiple of 4
}
size=(size+3)&~3; // Round up to a multiple of 4
// Allocate space for the rom plus padding
rom=PicoCartAlloc(size);
if (rom==NULL) return 1; // { fclose(f); return 1; }
fread(rom,1,size,f); // Load up the rom
// fclose(f); // this is confusing. From now on, caller should close it, because it opened this.
// maybe we are loading MegaCD BIOS?
if (!(PicoMCD&1) && size == 0x20000 && (!strncmp((char *)rom+0x124, "BOOT", 4) || !strncmp((char *)rom+0x128, "BOOT", 4))) {
PicoMCD |= 1;
rom = cd_realloc(rom, size);
}
// Check for SMD:
if ((size&0x3fff)==0x200) { DecodeSmd(rom,size); size-=0x200; } // Decode and byteswap SMD
@ -184,6 +187,13 @@ int CartLoadZip(const char *fname, unsigned char **prom, unsigned int *psize)
closezip(zipfile);
// maybe we are loading MegaCD BIOS?
if (!(PicoMCD&1) && size == 0x20000 &&
(!strncmp((char *)rom+0x124, "BOOT", 4) || !strncmp((char *)rom+0x128, "BOOT", 4))) {
PicoMCD |= 1;
rom = cd_realloc(rom, size);
}
// Check for SMD:
if ((size&0x3fff)==0x200) { DecodeSmd(rom,size); size-=0x200; } // Decode and byteswap SMD
else Byteswap(rom,size); // Just byteswap