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neogeo.c: endian fix for softlist ROM loading [Alex Jackson]

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Alex W. Jackson 2013-11-05 06:45:44 +00:00
parent e0f1c2478f
commit 50cdc0f4ae
1 changed files with 10 additions and 5 deletions
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15
src/mame/drivers/neogeo.c
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@ -1094,15 +1094,20 @@ DEVICE_IMAGE_LOAD_MEMBER( neogeo_state, neo_cartridge )
size = image.get_software_region_length("maincpu");
machine().memory().region_free(":maincpu");
machine().memory().region_alloc(":maincpu",size, 2, ENDIANNESS_BIG);
memcpy(memregion("maincpu")->base(),image.get_software_region("maincpu"),size);
// Reset the reference to the region
m_region_maincpu.findit();
// for whatever reason (intentional, or design flaw) software loaded via software lists is swapped in endianess vs. the standard ROM loading, regardless of the above. Swap it to keep consistency
for (int i=0; i<size/2;i++)
#ifdef LSB_FIRST
// software list ROM loading currently does not fix up endianness for us, so we need to do it by hand
UINT16 *src = (UINT16 *)image.get_software_region("maincpu");
UINT16 *dst = (UINT16 *)memregion("maincpu")->base();
for (int i=0; i<size/2; i++)
{
UINT16* ROM = (UINT16*)memregion("maincpu")->base();
ROM[i] = ((ROM[i]&0xff00)>>8) | ((ROM[i]&0x00ff)<<8);
dst[i] = FLIPENDIAN_INT16(src[i]);
}
#else
memcpy(memregion("maincpu")->base(),image.get_software_region("maincpu"),size);
#endif
size = image.get_software_region_length("fixed");
machine().memory().region_free(":fixed");