MAME SVN History

199869 Revisions

r18670 Tuesday 23rd October, 2012 at 01:08:45 UTC by hap
- pgm.c: Fix level 6 crash on kov . [IQ_132] - megadrvb.c: simplify decode function for srmdb. [IQ_132]

[src/mame/drivers]	megadrvb.c
[src/mame/machine]	pgmprot1.c

trunk/src/mame/machine/pgmprot1.c
r18669	r18670
952	952	break;
953	953
954	954	case 0xcc: // Background layer offset
955		if (state->m_value0 & 0x400) state->m_value0 = -(0x400 - (state->m_value0 & 0x3ff));
956		state->m_valueresponse = 0x900000 + ((state->m_kov_cb_value + (state->m_value0 * 0x40)) * 4);
	955	{
	956	int y = state->m_value0;
	957	if (y & 0x400) y = -(0x400 - (y & 0x3ff));
	958	state->m_valueresponse = 0x900000 + ((state->m_kov_cb_value + (y * 0x40)) * 4);
	959	}
957	960	break;
958	961
959	962	case 0xd0: // Text palette offset
r18669	r18670
1015	1018
1016	1019	default:
1017	1020	state->m_valueresponse = 0x880000;
1018		// bpr~~intf~~ (~~PRINT_NORMAL, _T(~~"Unknown ASIC27 command: %2.2x data: %4.4x\n"), (data ^ state->m_valuekey) & 0xff, state->m_value0);
	1021	// logerror("Unknown ASIC27 command: %2.2x data: %4.4x\n", (data ^ state->m_valuekey) & 0xff, state->m_value0);
1019	1022	break;
1020	1023	}
1021	1024	}

trunk/src/mame/drivers/megadrvb.c
r18669	r18670
738	738	{
739	739	UINT8* rom = machine().root_device().memregion("maincpu")->base();
740	740
741		/* todo, reduce bitswaps to single swap */
742	741	for (int x = 0x00001; x < 0x40000; x += 2)
743	742	{
744		rom[x] = rom[x] ^ 0xff;
745		rom[x] = BITSWAP8(rom[x], 7,6,5,4,3,2,1,0);
746		rom[x] = BITSWAP8(rom[x], 1,6,5,4,3,2,7,0);
747		rom[x] = BITSWAP8(rom[x], 7,6,5,3,4,2,1,0);
748		rom[x] = BITSWAP8(rom[x], 7,6,5,2,3,4,1,0);
749		rom[x] = BITSWAP8(rom[x], 5,6,7,4,3,2,1,0);
750		rom[x] = BITSWAP8(rom[x], 7,5,6,4,3,2,1,0);
	743	rom[x] = BITSWAP8(rom[x] ^ 0xff, 5,1,6,2,4,3,7,0);
751	744	}
752	745
753	746	for (int x = 0x40001; x < 0x80000; x += 2)
754	747	{
755		rom[x] = BITSWAP8(rom[x], 7,6,5,4,3,2,1,0);
756		rom[x] = BITSWAP8(rom[x], 7,6,1,4,3,2,5,0);
757		rom[x] = BITSWAP8(rom[x], 7,6,5,4,0,2,1,3);
758		rom[x] = BITSWAP8(rom[x], 2,6,5,4,3,7,1,0);
759		rom[x] = BITSWAP8(rom[x], 7,6,5,0,3,2,1,4);
760		rom[x] = BITSWAP8(rom[x], 7,6,5,1,3,2,4,0);
761
	748	rom[x] = BITSWAP8(rom[x] ^ 0x00, 2,6,1,5,0,7,3,4);
762	749	}
763	750
764	751	// boot vectors don't seem to be valid, so they are patched...

199869 Revisions