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small timing fix 

needed for family basic
This commit is contained in:
alyosha-tas 2016-09-07 20:05:02 -04:00 committed by GitHub
parent fd07f0eb3c
commit 29cec0e49b
2 changed files with 12 additions and 6 deletions
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6
BizHawk.Emulation.Cores/Consoles/Nintendo/NES/PPU.regs.cs
View File

@ -340,9 +340,11 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
if (!reg_2000.vblank_nmi_gen & ((value & 0x80) != 0) && (Reg2002_vblank_active) && !Reg2002_vblank_clear_pending)
{
//if we just unleashed the vblank interrupt then activate it now
NMI_PendingInstructions = 2;
if (ppudead<=1)
NMI_PendingInstructions = 2;
}
reg_2000.Value = value;
if (ppudead<=1)
reg_2000.Value = value;
}

12
BizHawk.Emulation.Cores/Consoles/Nintendo/NES/PPU.run.cs
View File

@ -581,11 +581,15 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
//register before around a full frame, but no games
//should write to those regs during that time, it needs
//to wait for vblank
ppur.status.sl = 241;
runppu(postNMIlines * kLineTime);
ppur.status.sl = 0;
Reg2002_vblank_active = true;
if (ppudead<2)
{
ppur.status.sl = 241;
runppu(postNMIlines * kLineTime);
ppur.status.sl = 0;
clear_2002();
}
runppu(241 * kLineTime);
Reg2002_vblank_active = true;
runppu(preNMIlines * kLineTime);
--ppudead;
}