diff --git a/Source/Core/Core/State.cpp b/Source/Core/Core/State.cpp
index aac9d05221..21b10bf28a 100644
--- a/Source/Core/Core/State.cpp
+++ b/Source/Core/Core/State.cpp
@@ -99,7 +99,7 @@ static size_t s_state_writes_in_queue;
 static std::condition_variable s_state_write_queue_is_empty;
 
 // Don't forget to increase this after doing changes on the savestate system
-constexpr u32 STATE_VERSION = 169;  // Last changed in PR 13074
+constexpr u32 STATE_VERSION = 170;  // Last changed in PR 13219
 
 // Increase this if the StateExtendedHeader definition changes
 constexpr u32 EXTENDED_HEADER_VERSION = 1;  // Last changed in PR 12217
diff --git a/Source/Core/VideoCommon/CommandProcessor.cpp b/Source/Core/VideoCommon/CommandProcessor.cpp
index 69b52c5355..3a771e1f2a 100644
--- a/Source/Core/VideoCommon/CommandProcessor.cpp
+++ b/Source/Core/VideoCommon/CommandProcessor.cpp
@@ -87,11 +87,6 @@ void CommandProcessorManager::DoState(PointerWrap& p)
   p.Do(m_cp_status_reg);
   p.Do(m_cp_ctrl_reg);
   p.Do(m_cp_clear_reg);
-  p.Do(m_bbox_left);
-  p.Do(m_bbox_top);
-  p.Do(m_bbox_right);
-  p.Do(m_bbox_bottom);
-  p.Do(m_token_reg);
   m_fifo.DoState(p);
 
   p.Do(m_interrupt_set);
@@ -118,13 +113,6 @@ void CommandProcessorManager::Init()
 
   m_cp_clear_reg.Hex = 0;
 
-  m_bbox_left = 0;
-  m_bbox_top = 0;
-  m_bbox_right = 640;
-  m_bbox_bottom = 480;
-
-  m_token_reg = 0;
-
   m_fifo.Init();
 
   m_is_fifo_error_seen = false;
@@ -138,8 +126,6 @@ void CommandProcessorManager::Init()
 
 void CommandProcessorManager::RegisterMMIO(MMIO::Mapping* mmio, u32 base)
 {
-  constexpr u16 WMASK_NONE = 0x0000;
-  constexpr u16 WMASK_ALL = 0xffff;
   constexpr u16 WMASK_LO_ALIGN_32BIT = 0xffe0;
   const u16 WMASK_HI_RESTRICT = GetPhysicalAddressMask(m_system.IsWii()) >> 16;
 
@@ -147,47 +133,32 @@ void CommandProcessorManager::RegisterMMIO(MMIO::Mapping* mmio, u32 base)
   {
     u32 addr;
     u16* ptr;
-    bool readonly;
     // FIFO mmio regs in the range [cc000020-cc00003e] have certain bits that always read as 0
     // For _LO registers in this range, only bits 0xffe0 can be set
     // For _HI registers in this range, only bits 0x03ff can be set on GCN and 0x1fff on Wii
     u16 wmask;
   } directly_mapped_vars[] = {
-      {FIFO_TOKEN_REGISTER, &m_token_reg, false, WMASK_ALL},
-
-      // Bounding box registers are read only.
-      {FIFO_BOUNDING_BOX_LEFT, &m_bbox_left, true, WMASK_NONE},
-      {FIFO_BOUNDING_BOX_RIGHT, &m_bbox_right, true, WMASK_NONE},
-      {FIFO_BOUNDING_BOX_TOP, &m_bbox_top, true, WMASK_NONE},
-      {FIFO_BOUNDING_BOX_BOTTOM, &m_bbox_bottom, true, WMASK_NONE},
-      {FIFO_BASE_LO, MMIO::Utils::LowPart(&m_fifo.CPBase), false, WMASK_LO_ALIGN_32BIT},
-      {FIFO_BASE_HI, MMIO::Utils::HighPart(&m_fifo.CPBase), false, WMASK_HI_RESTRICT},
-      {FIFO_END_LO, MMIO::Utils::LowPart(&m_fifo.CPEnd), false, WMASK_LO_ALIGN_32BIT},
-      {FIFO_END_HI, MMIO::Utils::HighPart(&m_fifo.CPEnd), false, WMASK_HI_RESTRICT},
-      {FIFO_HI_WATERMARK_LO, MMIO::Utils::LowPart(&m_fifo.CPHiWatermark), false,
-       WMASK_LO_ALIGN_32BIT},
-      {FIFO_HI_WATERMARK_HI, MMIO::Utils::HighPart(&m_fifo.CPHiWatermark), false,
-       WMASK_HI_RESTRICT},
-      {FIFO_LO_WATERMARK_LO, MMIO::Utils::LowPart(&m_fifo.CPLoWatermark), false,
-       WMASK_LO_ALIGN_32BIT},
-      {FIFO_LO_WATERMARK_HI, MMIO::Utils::HighPart(&m_fifo.CPLoWatermark), false,
-       WMASK_HI_RESTRICT},
+      {FIFO_BASE_LO, MMIO::Utils::LowPart(&m_fifo.CPBase), WMASK_LO_ALIGN_32BIT},
+      {FIFO_BASE_HI, MMIO::Utils::HighPart(&m_fifo.CPBase), WMASK_HI_RESTRICT},
+      {FIFO_END_LO, MMIO::Utils::LowPart(&m_fifo.CPEnd), WMASK_LO_ALIGN_32BIT},
+      {FIFO_END_HI, MMIO::Utils::HighPart(&m_fifo.CPEnd), WMASK_HI_RESTRICT},
+      {FIFO_HI_WATERMARK_LO, MMIO::Utils::LowPart(&m_fifo.CPHiWatermark), WMASK_LO_ALIGN_32BIT},
+      {FIFO_HI_WATERMARK_HI, MMIO::Utils::HighPart(&m_fifo.CPHiWatermark), WMASK_HI_RESTRICT},
+      {FIFO_LO_WATERMARK_LO, MMIO::Utils::LowPart(&m_fifo.CPLoWatermark), WMASK_LO_ALIGN_32BIT},
+      {FIFO_LO_WATERMARK_HI, MMIO::Utils::HighPart(&m_fifo.CPLoWatermark), WMASK_HI_RESTRICT},
       // FIFO_RW_DISTANCE has some complex read code different for
       // single/dual core.
-      {FIFO_WRITE_POINTER_LO, MMIO::Utils::LowPart(&m_fifo.CPWritePointer), false,
-       WMASK_LO_ALIGN_32BIT},
-      {FIFO_WRITE_POINTER_HI, MMIO::Utils::HighPart(&m_fifo.CPWritePointer), false,
-       WMASK_HI_RESTRICT},
+      {FIFO_WRITE_POINTER_LO, MMIO::Utils::LowPart(&m_fifo.CPWritePointer), WMASK_LO_ALIGN_32BIT},
+      {FIFO_WRITE_POINTER_HI, MMIO::Utils::HighPart(&m_fifo.CPWritePointer), WMASK_HI_RESTRICT},
       // FIFO_READ_POINTER has different code for single/dual core.
-      {FIFO_BP_LO, MMIO::Utils::LowPart(&m_fifo.CPBreakpoint), false, WMASK_LO_ALIGN_32BIT},
-      {FIFO_BP_HI, MMIO::Utils::HighPart(&m_fifo.CPBreakpoint), false, WMASK_HI_RESTRICT},
+      {FIFO_BP_LO, MMIO::Utils::LowPart(&m_fifo.CPBreakpoint), WMASK_LO_ALIGN_32BIT},
+      {FIFO_BP_HI, MMIO::Utils::HighPart(&m_fifo.CPBreakpoint), WMASK_HI_RESTRICT},
   };
 
   for (auto& mapped_var : directly_mapped_vars)
   {
     mmio->Register(base | mapped_var.addr, MMIO::DirectRead<u16>(mapped_var.ptr),
-                   mapped_var.readonly ? MMIO::InvalidWrite<u16>() :
-                                         MMIO::DirectWrite<u16>(mapped_var.ptr, mapped_var.wmask));
+                   MMIO::DirectWrite<u16>(mapped_var.ptr, mapped_var.wmask));
   }
 
   // Timing and metrics MMIOs are stubbed with fixed values.
diff --git a/Source/Core/VideoCommon/CommandProcessor.h b/Source/Core/VideoCommon/CommandProcessor.h
index b231eaa3dc..fcd81a893e 100644
--- a/Source/Core/VideoCommon/CommandProcessor.h
+++ b/Source/Core/VideoCommon/CommandProcessor.h
@@ -60,11 +60,6 @@ enum
   CTRL_REGISTER = 0x02,
   CLEAR_REGISTER = 0x04,
   PERF_SELECT = 0x06,
-  FIFO_TOKEN_REGISTER = 0x0E,
-  FIFO_BOUNDING_BOX_LEFT = 0x10,
-  FIFO_BOUNDING_BOX_RIGHT = 0x12,
-  FIFO_BOUNDING_BOX_TOP = 0x14,
-  FIFO_BOUNDING_BOX_BOTTOM = 0x16,
   FIFO_BASE_LO = 0x20,
   FIFO_BASE_HI = 0x22,
   FIFO_END_LO = 0x24,