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nes, add some debug to the gamegenie cheat thing, for finding rom offsets of the gamegenie code

This commit is contained in:
dinkc64 2024-12-30 00:59:13 -05:00
parent a53133910d
commit cc6e1181c8
1 changed files with 17 additions and 1 deletions
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18
src/burn/drv/nes/nes.cpp
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@ -1104,6 +1104,14 @@ static void mapper_map_chr_ramrom(INT32 pagesz, INT32 slot, INT32 bank, INT32 ty
}
}
// FIND_CHEAT_ROMOFFSET helps to find the rom offset of gamegenie cheats
// when an address hits :)
#define FIND_CHEAT_ROMOFFSET 0
#if FIND_CHEAT_ROMOFFSET
static int l_address, l_offset;
#endif
static UINT8 mapper_prg_read_int(UINT16 address) // mapper_prg_read points here
{
#if 0
@ -1112,6 +1120,12 @@ static UINT8 mapper_prg_read_int(UINT16 address) // mapper_prg_read points here
bprintf(0, _T("mapper_prg_read_int(): address %x, bad PRGType[%x]!\n"), address, PRGType[(address & ~0x8000) / 0x2000]);
}
#endif
#if FIND_CHEAT_ROMOFFSET
l_address = address;
l_offset = PRGMap[(address & ~0x8000) / 0x2000] + (address & 0x1fff);
#endif
return prg_maps[PRGType[(address & ~0x8000) / 0x2000]] [PRGMap[(address & ~0x8000) / 0x2000] + (address & 0x1fff)];
#if 0
// the old version, more "readable", but slower. save to keep sane.
@ -10837,7 +10851,9 @@ static inline UINT8 cheat_check(UINT16 address, UINT8 value)
{
for (INT32 i = 0; i < cheats_active; i++) {
if (cheats[i].address == address && (cheats[i].compare == -1 || cheats[i].compare == value)) {
// bprintf(0, _T("."));
#if FIND_CHEAT_ROMOFFSET
bprintf(0, _T("%x %x -> %x, prg addy/offset: %x %x\n"), address, cheats[i].compare, cheats[i].value, l_address, l_offset);
#endif
return cheats[i].value;
}
}