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NESHawk: Rambo-1 IRQ work 

-maintains compatibility with skull and crossbones and klax.
-Fixes hard Drivin'
-More work to do here
This commit is contained in:
alyosha-tas 2017-08-02 21:58:54 -04:00 committed by GitHub
parent 497513f93a
commit ad85143c8c
1 changed files with 76 additions and 14 deletions
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90
BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/TENGEN-800032.cs
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@ -1,5 +1,6 @@
using BizHawk.Common;
using BizHawk.Common.NumberExtensions;
using System;
namespace BizHawk.Emulation.Cores.Nintendo.NES
{
@ -25,6 +26,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
bool irq_mode;
bool irq_reload_pending;
int separator_counter;
int irq_countdown_2 = 0;
bool clock_scanline_irq;
public override void Dispose()
@ -172,20 +175,20 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
case 0x4001:
irq_mode = value.Bit(0);
if (irq_mode) irq_countdown = 12;
if (irq_mode) irq_countdown = 4;
irq_reload_pending = true;
break;
case 0x6000:
irq_enable = false;
irq_pending = false;
irq_counter = 0;
SyncIRQ();
break;
case 0x6001:
irq_enable = true;
SyncIRQ();
break;
}
}
@ -224,20 +227,79 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
{
irq_counter = irq_reload + 1;
irq_reload_pending = false;
if (irq_counter == 0)
{
if (irq_enable)
{
irq_countdown_2 = 9;
}
}
}
else if (irq_counter == 0)
irq_counter--;
if (irq_counter==0)
{
if (irq_enable)
{
irq_countdown_2 = 9;
}
irq_counter = irq_reload + 1;
}
if (irq_counter < 0)
{
irq_counter = irq_reload;
}
/*
else if (irq_counter == 0)
{
irq_counter = irq_reload;
if (irq_counter == 0)
{
if (irq_enable)
{
irq_countdown_2 = 9;
}
}
}
else
{
irq_counter--;
if (irq_counter == 0 && irq_enable)
if (irq_enable)
{
irq_pending = true;
SyncIRQ();
}
if (irq_counter==0)
irq_countdown_2 = 9;
}
}
*/
}
public override void ClockCPU()
{
if (irq_mode == true)
{
irq_countdown--;
if (irq_countdown == 0)
{
ClockIRQ();
irq_countdown = 4;
}
}
else
{
if (clock_scanline_irq)
{
clock_scanline_irq = false;
ClockIRQ();
}
}
}
public override void ClockPPU()
@ -245,14 +307,13 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
if (separator_counter > 0)
separator_counter--;
if (irq_countdown > 0)
if (irq_countdown_2 > 0)
{
irq_countdown--;
if (irq_countdown == 0)
irq_countdown_2--;
if (irq_countdown_2==0)
{
ClockIRQ();
if (irq_mode==true)
irq_countdown = 12;
irq_pending = true;
SyncIRQ();
}
}
}
@ -270,7 +331,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
else
{
separator_counter = 15;
irq_countdown = 11;
clock_scanline_irq = true;
}
}