Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-05-22 05:38:52 +03:00
Code Issues Actions 6 Packages Projects Releases Wiki Activity

Temporary made cycle stealing less aggressive, no whatsnew

Browse Source
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
src/mame/machine/snes.c
View File

@ -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)
{
/*
@ -825,15 +825,17 @@ static int snes_bank_0x00_0x3f_cycles(running_machine *machine,UINT32 offset)
*/
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))
return 8;
return 0; //TODO: 8
if((offset & 0xff00) >= 0x6000)
return 8;
return 6;
return 0; //TODO: 6
}
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
*/
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))
return 8;
return 0; //TODO: 8
if(((offset & 0xff00) >= 0x6000) && ((offset & 0xff00) <= 0x7f00))
return 8;
return 0; //TODO: 8
if(((offset & 0xff00) >= 0x8000) && ((offset & 0xff00) <= 0xff00))
return (snes_ram[MEMSEL] & 1) ? 6 : 8;
return 6;
return 0; //TODO: 6
}
/* 0x000000 - 0x2fffff */