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GPU: Let GPU catch up before handling GP1 reset commands

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Fixes trashed VRAM writes in some homebrew.
This commit is contained in:
Connor McLaughlin
2020-07-05 02:25:55 +10:00
parent b0b3901722
commit 511c3133f1
1 changed files with 3 additions and 0 deletions
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3
src/core/gpu.cpp
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@ -891,6 +891,7 @@ void GPU::WriteGP1(u32 value)
case 0x00: // Reset GPU case 0x00: // Reset GPU
{ {
Log_DebugPrintf("GP1 reset GPU"); Log_DebugPrintf("GP1 reset GPU");
m_command_tick_event->InvokeEarly();
SynchronizeCRTC(); SynchronizeCRTC();
SoftReset(); SoftReset();
} }
@ -899,6 +900,7 @@ void GPU::WriteGP1(u32 value)
case 0x01: // Clear FIFO case 0x01: // Clear FIFO
{ {
Log_DebugPrintf("GP1 clear FIFO"); Log_DebugPrintf("GP1 clear FIFO");
m_command_tick_event->InvokeEarly();
SynchronizeCRTC(); SynchronizeCRTC();
m_blitter_state = BlitterState::Idle; m_blitter_state = BlitterState::Idle;
m_command_total_words = 0; m_command_total_words = 0;
@ -1007,6 +1009,7 @@ void GPU::WriteGP1(u32 value)
{ {
// Have to be careful when setting this because Synchronize() can modify GPUSTAT. // Have to be careful when setting this because Synchronize() can modify GPUSTAT.
static constexpr u32 SET_MASK = UINT32_C(0b00000000011111110100000000000000); static constexpr u32 SET_MASK = UINT32_C(0b00000000011111110100000000000000);
m_command_tick_event->InvokeEarly();
SynchronizeCRTC(); SynchronizeCRTC();
m_GPUSTAT.bits = (m_GPUSTAT.bits & ~SET_MASK) | (new_GPUSTAT.bits & SET_MASK); m_GPUSTAT.bits = (m_GPUSTAT.bits & ~SET_MASK) | (new_GPUSTAT.bits & SET_MASK);
UpdateCRTCConfig(); UpdateCRTCConfig();