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added 12-in-1 mapper to carthw

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@369 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2008-03-05 18:50:28 +00:00
parent 48df6e9e54
commit 757f8dae1a
7 changed files with 87 additions and 22 deletions
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13
Pico/Memory.c
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@ -303,19 +303,8 @@ static void OtherWrite8End(u32 a,u32 d,int realsize)
#endif
elprintf(EL_UIO, "strange w%i: %06x, %08x @%06x", realsize, a&0xffffff, d, SekPc);
if(a >= 0xA13004 && a < 0xA13040) {
// dumb 12-in-1 or 4-in-1 banking support
int len;
a &= 0x3f; a <<= 16;
len = Pico.romsize - a;
if (len <= 0) return; // invalid/missing bank
if (len > 0x200000) len = 0x200000; // 2 megs
memcpy(Pico.rom, Pico.rom+a, len); // code which does this is in RAM so this is safe.
return;
}
// for games with simple protection devices, discovered by Haze
else if ((a>>22) == 1)
if ((a>>22) == 1)
Pico.m.prot_bytes[(a>>2)&1] = (u8)d;
}