Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-05-23 22:20:01 +03:00
Code Issues Actions 3 Packages Projects Releases Wiki Activity

snes.c - Fixed problem with OAM address reset at start of vblank.

Browse Source 
New games added or promoted from NOT_WORKING status
---------------------------------------------------
Sonic Blast Man 2 Special Turbo (SNES bootleg) [Andreas Naive, Tomasz Slanina]
This commit is contained in:
Tomasz Slanina 2008-10-08 18:35:22 +00:00
parent b02332f875
commit 3df44083f8
3 changed files with 11 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
src/mame/drivers/snesb.c
View File

@ -7,7 +7,7 @@
Supported games:
- Killer Instinct
- Final Fight 2
- Sonic Blast Man 2 - not working due to bugs in SNES ppu emulation
- Sonic Blast Man 2
Not dumped:
- Final Fight 3
@ -775,4 +775,4 @@ ROM_END
GAME( 199?, kinstb, 0, kinstb, kinstb, kinstb, ROT0, "bootleg", "Killer Instinct (SNES bootleg)", GAME_IMPERFECT_SOUND | GAME_IMPERFECT_GRAPHICS )
GAME( 1996, ffight2b, 0, kinstb, ffight2b, ffight2b, ROT0, "bootleg", "Final Fight 2 (SNES bootleg)", GAME_IMPERFECT_SOUND | GAME_IMPERFECT_GRAPHICS )
GAME( 1997, sblast2b, 0, kinstb, sblast2b, sblast2b, ROT0, "bootleg", "Sonic Blast Man 2 Special Turbo (SNES bootleg)", GAME_IMPERFECT_SOUND | GAME_IMPERFECT_GRAPHICS | GAME_NOT_WORKING)
GAME( 1997, sblast2b, 0, kinstb, sblast2b, sblast2b, ROT0, "bootleg", "Sonic Blast Man 2 Special Turbo (SNES bootleg)", GAME_IMPERFECT_SOUND | GAME_IMPERFECT_GRAPHICS)

2
src/mame/includes/snes.h
View File

@ -414,6 +414,8 @@ struct SNES_PPU_STRUCT
{
UINT8 address_low;
UINT8 address_high;
UINT8 saved_address_low;
UINT8 saved_address_high;
UINT16 address;
UINT16 priority_rotation;
UINT8 size[2];

9
src/mame/machine/snes.c
View File

@ -156,8 +156,11 @@ static TIMER_CALLBACK( snes_scanline_tick )
/* Start of VBlank */
if( snes_ppu.beam.current_vert == snes_ppu.beam.last_visible_line )
{
program_write_byte(OAMADDL, snes_ppu.oam.address_low ); /* Reset oam address */
program_write_byte(OAMADDH, snes_ppu.oam.address_high );
if(!(snes_ram[INIDISP]&0x80))
{
program_write_byte(OAMADDL, snes_ppu.oam.saved_address_low ); /* Reset oam address */
program_write_byte(OAMADDH, snes_ppu.oam.saved_address_high );
}
snes_ram[HVBJOY] |= 0x81; /* Set vblank bit to on & indicate controllers being read */
snes_ram[RDNMI] |= 0x80; /* Set NMI occured bit */
@ -639,11 +642,13 @@ WRITE8_HANDLER( snes_w_io )
break;
case OAMADDL: /* Address for accessing OAM (low) */
snes_ppu.oam.address_low = data;
snes_ppu.oam.saved_address_low = data;
snes_ppu.oam.address = ((snes_ppu.oam.address_high & 0x1) << 8) + data;
snes_ram[OAMDATA] = 0;
break;
case OAMADDH: /* Address for accessing OAM (high) */
snes_ppu.oam.address_high = data & 0x1;
snes_ppu.oam.saved_address_high = data;
snes_ppu.oam.address = ((data & 0x1) << 8) + snes_ppu.oam.address_low;
snes_ppu.oam.priority_rotation = (data & 0x80) ? 1 : 0;
snes_ram[OAMDATA] = 0;