From f59d35023c2d5bb32aae57fe3eb694babdd3d27a Mon Sep 17 00:00:00 2001
From: Connor McLaughlin <mclaughc@outlook.com>
Date: Sat, 5 Oct 2019 22:22:49 +1000
Subject: [PATCH] GPU: Stub out more commands

---
 src/core/gpu.cpp | 48 +++++++++++++++++++++++++++++++++++++++++++++++-
 src/core/gpu.h   |  1 +
 2 files changed, 48 insertions(+), 1 deletion(-)

diff --git a/src/core/gpu.cpp b/src/core/gpu.cpp
index e28614bb8..ce475773d 100644
--- a/src/core/gpu.cpp
+++ b/src/core/gpu.cpp
@@ -360,7 +360,7 @@ u32 GPU::ReadGPUREAD()
 {
   if (m_GPUREAD_buffer.empty())
   {
-    Log_ErrorPrintf("GPUREAD read while buffer is empty");
+    Log_DevPrintf("GPUREAD read while buffer is empty");
     return UINT32_C(0xFFFFFFFF);
   }
 
@@ -518,6 +518,13 @@ void GPU::WriteGP1(u32 value)
     }
     break;
 
+    case 0x02: // Acknowledge Interrupt
+    {
+      Log_DebugPrintf("Acknowledge interrupt");
+      m_GPUSTAT.interrupt_request = false;
+    }
+    break;
+
     case 0x04: // DMA Direction
     {
       m_GPUSTAT.dma_direction = static_cast<DMADirection>(param);
@@ -579,12 +586,51 @@ void GPU::WriteGP1(u32 value)
     }
     break;
 
+    case 0x10:
+    case 0x11:
+    case 0x12:
+    case 0x13:
+    case 0x14:
+    case 0x15:
+    case 0x16:
+    case 0x17:
+    case 0x18:
+    case 0x19:
+    case 0x1A:
+    case 0x1B:
+    case 0x1C:
+    case 0x1D:
+    case 0x1E:
+    case 0x1F:
+    {
+      HandleGetGPUInfoCommand();
+    }
+    break;
+
     default:
       Log_ErrorPrintf("Unimplemented GP1 command 0x%02X", command);
       break;
   }
 }
 
+void GPU::HandleGetGPUInfoCommand()
+{
+  const u8 subcommand = Truncate8(m_GP0_command[0] & 0x07);
+  switch (subcommand)
+  {
+    case 0x00:
+    case 0x01:
+    case 0x06:
+    case 0x07:
+      // leave GPUREAD intact
+      break;
+
+    default:
+      Log_WarningPrintf("Unhandled GetGPUInfo(0x%02X)", ZeroExtend32(subcommand));
+      break;
+  }
+}
+
 bool GPU::HandleRenderCommand()
 {
   const u8 command = Truncate8(m_GP0_command[0] >> 24);
diff --git a/src/core/gpu.h b/src/core/gpu.h
index e63af87dc..137f5bb8e 100644
--- a/src/core/gpu.h
+++ b/src/core/gpu.h
@@ -181,6 +181,7 @@ protected:
   u32 ReadGPUREAD();
   void WriteGP0(u32 value);
   void WriteGP1(u32 value);
+  void HandleGetGPUInfoCommand();
 
   // Rendering commands, returns false if not enough data is provided
   bool HandleRenderCommand();