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Temporary made cycle stealing less aggressive, no whatsnew

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This commit is contained in:
Angelo Salese 2010-04-07 16:25:13 +00:00
parent bd07cb544c
commit f9f7c8ffd8
1 changed files with 14 additions and 8 deletions
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22
src/mame/machine/snes.c
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@ -809,7 +809,7 @@ address | | | | | | |
*/ */
/*FIXME: missing work RAM access steal */ /*FIXME: missing work RAM access steal / we need to do this less "aggressive" otherwise we lose too much CPU horsepower, why? */
static int snes_bank_0x00_0x3f_cycles(running_machine *machine,UINT32 offset) static int snes_bank_0x00_0x3f_cycles(running_machine *machine,UINT32 offset)
{ {
/* /*
@ -825,15 +825,17 @@ static int snes_bank_0x00_0x3f_cycles(running_machine *machine,UINT32 offset)
*/ */
if(((offset & 0xff00) == 0x4000) || ((offset & 0xff00) == 0x4100)) if(((offset & 0xff00) == 0x4000) || ((offset & 0xff00) == 0x4100))
return 12; return 0; //TODO: 12
if(((offset & 0xff00) == 0x4200) || ((offset & 0xff00) == 0x4300))
return 0; //TODO: 6
if(((offset & 0xff00) >= 0x0000) && ((offset & 0xff00) <= 0x1f00)) if(((offset & 0xff00) >= 0x0000) && ((offset & 0xff00) <= 0x1f00))
return 8; return 0; //TODO: 8
if((offset & 0xff00) >= 0x6000) if((offset & 0xff00) >= 0x6000)
return 8; return 8;
return 6; return 0; //TODO: 6
} }
static int snes_bank_0x80_0xbf_cycles(running_machine *machine,UINT32 offset) static int snes_bank_0x80_0xbf_cycles(running_machine *machine,UINT32 offset)
@ -850,19 +852,23 @@ static int snes_bank_0x80_0xbf_cycles(running_machine *machine,UINT32 offset)
| $8000-$FFFF | Note2 | Address Bus A + /CART | $8000-$FFFF | Note2 | Address Bus A + /CART
*/ */
if(((offset & 0xff00) == 0x4000) || ((offset & 0xff00) == 0x4100)) if(((offset & 0xff00) == 0x4000) || ((offset & 0xff00) == 0x4100))
return 12; return 0; //TODO: 12
if(((offset & 0xff00) == 0x4200) || ((offset & 0xff00) == 0x4300))
return 0; //TODO: 6
if(((offset & 0xff00) >= 0x0000) && ((offset & 0xff00) <= 0x1f00)) if(((offset & 0xff00) >= 0x0000) && ((offset & 0xff00) <= 0x1f00))
return 8; return 0; //TODO: 8
if(((offset & 0xff00) >= 0x6000) && ((offset & 0xff00) <= 0x7f00)) if(((offset & 0xff00) >= 0x6000) && ((offset & 0xff00) <= 0x7f00))
return 8; return 0; //TODO: 8
if(((offset & 0xff00) >= 0x8000) && ((offset & 0xff00) <= 0xff00)) if(((offset & 0xff00) >= 0x8000) && ((offset & 0xff00) <= 0xff00))
return (snes_ram[MEMSEL] & 1) ? 6 : 8; return (snes_ram[MEMSEL] & 1) ? 6 : 8;
return 6; return 0; //TODO: 6
} }
/* 0x000000 - 0x2fffff */ /* 0x000000 - 0x2fffff */