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[Core/MD] improved detection of Quackshot REV A original ROM dump (512KB)

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ekeeke 2023-03-12 18:51:24 +01:00
parent 1bf6f70986
commit ef922735ff
4 changed files with 6 additions and 6 deletions
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builds/genesis_plus_gx_libretro.dll
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12
core/cart_hw/md_cart.c
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@ -378,20 +378,20 @@ void md_cart_init(void)
zbank_memory_map[i].write = zbank_unused_w;
}
/* support for Quackshot REV 01 (real) dump */
if (strstr(rominfo.product,"00004054-01") && (cart.romsize == 0x80000))
/* support for Quackshot REV A original ROM dump (512KB) */
if (strstr(rominfo.product,"00004054-01") && (cart.romsize == 0x80000) && (rominfo.checksum == 0xa4b3))
{
/* $000000-$0fffff: first 256K mirrored (A18 not connected to ROM chip, A19 not decoded) */
/* $000000-$0fffff: lower 256KB mirrored (VA18 and VA19 not connected to ROM chip) */
for (i=0x00; i<0x10; i++)
{
/* $200000-$3fffff: mirror of $000000-$1fffff (A21 not decoded) */
/* $200000-$3fffff: mirror of $000000-$1fffff (VA21 not connected to ROM chip) */
m68k.memory_map[i].base = m68k.memory_map[i + 0x20].base = cart.rom + ((i & 0x03) << 16);
}
/* $100000-$1fffff: second 256K mirrored (A20 connected to ROM chip A18) */
/* $100000-$1fffff: upper 256KB mirrored (VA20 connected to ROM chip A19) */
for (i=0x10; i<0x20; i++)
{
/* $200000-$3fffff: mirror of $000000-$1fffff (A21 not decoded) */
/* $200000-$3fffff: mirror of $000000-$1fffff (VA21 not connected to ROM chip) */
m68k.memory_map[i].base = m68k.memory_map[i + 0x20].base = cart.rom + 0x40000 + ((i & 0x03) << 16);
}
}