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GBACart: simulate open-bus decay roughly. fixes #1093

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This commit is contained in:
Arisotura
2021-05-04 12:58:59 +02:00
parent b7d5a7db75
commit 50721719d2
3 changed files with 42 additions and 29 deletions
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15
src/GBACart.cpp
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@ -40,15 +40,15 @@ const char SOLAR_SENSOR_GAMECODES[10][5] =
bool CartInserted;
//bool HasSolarSensor;
u8* CartROM;
u32 CartROMSize;
u32 CartCRC;
u32 CartID;
//GPIO CartGPIO; // overridden GPIO parameters
CartCommon* Cart;
u16 OpenBusDecay;
CartCommon::CartCommon()
{
@ -631,6 +631,9 @@ void Reset()
// This allows resetting a DS game without losing GBA state,
// and resetting to firmware without the slot being emptied.
// The Stop function will clear the cartridge state via Eject().
// OpenBusDecay doesn't need to be reset, either, as it will be set
// through NDS::SetGBASlotTimings().
}
void Eject()
@ -795,11 +798,17 @@ int SetInput(int num, bool pressed)
}
void SetOpenBusDecay(u16 val)
{
OpenBusDecay = val;
}
u16 ROMRead(u32 addr)
{
if (Cart) return Cart->ROMRead(addr);
return (addr >> 1) & 0xFFFF;
return ((addr >> 1) & 0xFFFF) | OpenBusDecay;
}
void ROMWrite(u32 addr, u16 val)