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Improved protection in Steep Slope Sliders [Angelo Salese]

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This commit is contained in:
Angelo Salese 2013-02-13 20:46:11 +00:00
parent cb21b7721d
commit d96ff2ab99
1 changed files with 55 additions and 19 deletions
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74
src/mame/machine/stvprot.c
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@ -178,21 +178,33 @@ static READ32_HANDLER( sss_prot_r )
{
if(offset == 3)
{
UINT32 res;
logerror("A-Bus control protection read at %06x with data = %08x\n",space.device().safe_pc(),a_bus[3]);
#ifdef MAME_DEBUG
popmessage("Prot read at %06x with data = %08x",space.device().safe_pc(),a_bus[3]);
#endif
switch(a_bus[3])
switch(a_bus[3]>>16)
{
case 0x2c5b0000://sss
case 0x47f10000:
case 0xfcda0000:
case 0xb5e60000:
case 0x392c0000:
case 0x77c30000:
case 0x8a620000:
ctrl_index++;
return ROM[ctrl_index];
case 0x2c5b:
case 0x47f1:
case 0xfcda:
case 0xb5e6:
case 0x392c:
case 0x77c3:
case 0x8a62:
if(ctrl_index & 2)
{
res = (ROM[ctrl_index / 4] & 0xffff) << 16;
res |= (ROM[(ctrl_index+4) / 4] & 0xffff0000) >> 16;
}
else
{
res = ROM[ctrl_index / 4] & 0xffff0000;
res |= ROM[ctrl_index / 4] & 0xffff;
}
ctrl_index+=4;
return res;
}
}
return a_bus[offset];
@ -210,17 +222,41 @@ static WRITE32_HANDLER ( sss_prot_w )
logerror("A-Bus control protection write at %06x: [%02x] <- %08x\n",space.device().safe_pc(),offset,data);
if(offset == 3)
{
//logerror("MAIN : %08x DATA : %08x\n",a_bus[3],a_bus[2]);
switch(a_bus[3])
int a_bus_vector;
a_bus_vector = a_bus[2] >> 16;
a_bus_vector|= (a_bus[2] & 0xffff) << 16;
a_bus_vector<<= 1;
/*
MAIN : 2c5b0000 DATA : 000000a6 014c0000
MAIN : 47f10000 DATA : 0f9800a6 014c1f30
MAIN : fcda0000 DATA : 1d4800a6 014c3a90
MAIN : b5e60000 DATA : 29e300a6 014c53c6
MAIN : 392c0000 DATA : 38e900a6 014c71d2
MAIN : 77c30000 DATA : 462500a6 014c8c4a
MAIN : 8a620000 DATA : 555c00a6 014caab8
*/
// printf("MAIN : %08x DATA : %08x %08x\n",a_bus[3],a_bus[2],a_bus_vector);
switch(a_bus[3] >> 16)
{
case 0x2c5b0000: ctrl_index = (0x145ffac/4)-1; break;
case 0x47f10000: ctrl_index = ((0x145ffac+0xbaf0)/4)-1; break;
case 0xfcda0000: ctrl_index = ((0x145ffac+0x12fd0)/4)-1; break;
case 0xb5e60000: ctrl_index = ((0x145ffac+0x1a4c4)/4)-1; break;
case 0x392c0000: ctrl_index = ((0x145ffac+0x219b0)/4)-1; break;
case 0x77c30000: ctrl_index = ((0x145ffac+0x28ea0)/4)-1; break;
case 0x8a620000: ctrl_index = ((0x145ffac+0x30380)/4)-1; break;
/* Note: only the first value is TRUSTED (because it's tested in the code).
Others are hand-tuned by checking if there isn't any garbage during display. */
case 0x2c5b: ctrl_index = (a_bus_vector-0x60054); break;
case 0x47f1: ctrl_index = (a_bus_vector-0x56498); break;
case 0xfcda: ctrl_index = (a_bus_vector-0x50b0c); break;
case 0xb5e6: ctrl_index = (a_bus_vector-0x4af56); break;
case 0x392c: ctrl_index = (a_bus_vector-0x45876); break;
case 0x77c3: ctrl_index = (a_bus_vector-0x3fe02); break;
case 0x8a62: ctrl_index = (a_bus_vector-0x3a784); break;
default:
ctrl_index = 0;
popmessage("Unknown SSS seed %04x, contact MAMEdev",a_bus[3] >> 16);
break;
}
// printf("%08x\n",ctrl_index);
}
}