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NESHawk: fix regression in apu

This commit is contained in:
alyosha-tas 2021-12-27 10:24:29 -05:00
parent b45b552b9d
commit d113d76c6a
2 changed files with 17 additions and 2 deletions
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16
src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/APU.cs
View File

@ -693,7 +693,10 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
public bool fill_glitch;
// happens when a write triggered refill that sets length to zero happens too close to an automatic DMA
// (causes 1-cycle blips in dmc_dma_start_test_v2)
public bool fill_glitch_2;
public bool fill_glitch_2;
public bool fill_glitch_2_end;
public bool timer_just_reloaded;
public int sample => out_deltacounter /* - 64*/;
@ -719,6 +722,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
ser.Sync(nameof(out_silence), ref out_silence);
ser.Sync(nameof(fill_glitch), ref fill_glitch);
ser.Sync(nameof(fill_glitch_2), ref fill_glitch_2);
ser.Sync(nameof(fill_glitch_2_end), ref fill_glitch_2_end);
ser.Sync(nameof(timer_just_reloaded), ref timer_just_reloaded);
ser.Sync(nameof(delay), ref delay);
@ -728,11 +733,13 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void Run()
{
timer_just_reloaded = false;
if (timer > 0) timer--;
if (timer == 0)
{
timer = timer_reload;
Clock();
timer_just_reloaded = true;
}
// Any time the sample buffer is in an empty state and bytes remaining is not zero, the following occur:
@ -753,6 +760,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
//Console.WriteLine("fill glitch 2");
apu.dmc_dma_countdown = 4;
apu.DMC_RDY_check = -1;
fill_glitch_2_end = true;
}
else
{
@ -861,6 +869,12 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
if ((timer <= 3) && (out_bits_remaining == 0) && (sample_length != 0))
{
Console.WriteLine("glitch 2 " + timer);
fill_glitch_2 = true;
}
if (timer_just_reloaded && (sample_length != 0))
{
Console.WriteLine("glitch 3 " + timer);
//fill_glitch_2 = true;
}
*/

3
src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/NES.Core.cs
View File

@ -584,11 +584,12 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
// DMC was started in the APU, but in this case it only lasts 1 cycle and is then aborted, so put this here
// TODO: should this clock controllers?
if (apu.dmc.fill_glitch_2)
if (apu.dmc.fill_glitch_2_end)
{
apu.dmc_dma_countdown = -1;
dmc_dma_exec = false;
apu.dmc.fill_glitch_2 = false;
apu.dmc.fill_glitch_2_end = false;
}
cpu.ExecuteOne();