GPU: Only accept DMA writes when FIFO is empty or command incomplete

Fixes a bunch of games, including Red Asphalt, Little Princess, Vampire Hunter D main menu when combined with tight DMA sync.
5 years ago · 473cfffa0c
parent df12f08ac3
commit 473cfffa0c
1 changed files with 1 additions and 1 deletions
--- a/src/core/gpu.cpp
+++ b/src/core/gpu.cpp
@ -246,7 +246,7 @@ void GPU::UpdateDMARequest()
  {
    case BlitterState::Idle:
      m_GPUSTAT.ready_to_send_vram = false;
-      m_GPUSTAT.ready_to_recieve_dma = (m_fifo.GetSize() < m_fifo_size);
+      m_GPUSTAT.ready_to_recieve_dma = (m_fifo.IsEmpty() || m_fifo.GetSize() < m_command_total_words);
      break;

    case BlitterState::WritingVRAM: