diff --git a/src/xenia/cpu/compiler/passes/constant_propagation_pass.cc b/src/xenia/cpu/compiler/passes/constant_propagation_pass.cc
index 468e35ce0..c8a5ef632 100644
--- a/src/xenia/cpu/compiler/passes/constant_propagation_pass.cc
+++ b/src/xenia/cpu/compiler/passes/constant_propagation_pass.cc
@@ -153,6 +153,14 @@ bool ConstantPropagationPass::Run(HIRBuilder* builder) {
             i->Remove();
           }
           break;
+        case OPCODE_CONVERT:
+          if (i->src1.value->IsConstant()) {
+            TypeName target_type = v->type;
+            v->set_from(i->src1.value);
+            v->Convert(target_type, RoundMode(i->flags));
+            i->Remove();
+          }
+          break;
         case OPCODE_ZERO_EXTEND:
           if (i->src1.value->IsConstant()) {
             TypeName target_type = v->type;
@@ -195,10 +203,29 @@ bool ConstantPropagationPass::Run(HIRBuilder* builder) {
                   !(protect & kMemoryProtectWrite) &&
                   (protect & kMemoryProtectRead)) {
                 // Memory is readonly - can just return the value.
+                auto host_addr = memory->TranslateVirtual(address);
                 switch (v->type) {
+                  case INT8_TYPE:
+                    v->set_constant(xe::load<uint8_t>(host_addr));
+                    i->Remove();
+                    break;
+                  case INT16_TYPE:
+                    v->set_constant(xe::load<uint16_t>(host_addr));
+                    i->Remove();
+                    break;
                   case INT32_TYPE:
-                    v->set_constant(xe::load_and_swap<uint32_t>(
-                        memory->TranslateVirtual(address)));
+                    v->set_constant(xe::load<uint32_t>(host_addr));
+                    i->Remove();
+                    break;
+                  case INT64_TYPE:
+                    v->set_constant(xe::load<uint64_t>(host_addr));
+                    i->Remove();
+                    break;
+                  case VEC128_TYPE:
+                    vec128_t val;
+                    val.low = xe::load<uint64_t>(host_addr);
+                    val.high = xe::load<uint64_t>(host_addr + 8);
+                    v->set_constant(val);
                     i->Remove();
                     break;
                   default:
diff --git a/src/xenia/cpu/hir/value.cc b/src/xenia/cpu/hir/value.cc
index d8f614a7e..e0be35b58 100644
--- a/src/xenia/cpu/hir/value.cc
+++ b/src/xenia/cpu/hir/value.cc
@@ -77,8 +77,8 @@ uint64_t Value::AsUint64() {
 }
 
 void Value::Cast(TypeName target_type) {
-  // TODO(benvanik): big matrix.
-  assert_always();
+  // Only need a type change.
+  type = target_type;
 }
 
 void Value::ZeroExtend(TypeName target_type) {
@@ -199,8 +199,25 @@ void Value::Truncate(TypeName target_type) {
 }
 
 void Value::Convert(TypeName target_type, RoundMode round_mode) {
-  // TODO(benvanik): big matrix.
-  assert_always();
+  switch (type) {
+    case FLOAT32_TYPE:
+      switch (target_type) {
+        case FLOAT64_TYPE:
+          type = target_type;
+          constant.f64 = constant.f32;
+          return;
+      }
+    case FLOAT64_TYPE:
+      switch (target_type) {
+        case FLOAT32_TYPE:
+          type = target_type;
+          constant.f32 = (float)constant.f64;
+          return;
+      }
+    default:
+      assert_unhandled_case(target_type);
+      return;
+  }
 }
 
 void Value::Round(RoundMode round_mode) {
diff --git a/src/xenia/cpu/xex_module.cc b/src/xenia/cpu/xex_module.cc
index 07730e211..ba2a24184 100644
--- a/src/xenia/cpu/xex_module.cc
+++ b/src/xenia/cpu/xex_module.cc
@@ -281,6 +281,34 @@ bool XexModule::Load(const std::string& name, const std::string& path,
     }
   }
 
+  // Setup memory protection.
+  // TODO: This introduces a load of constants into the JIT, and Xenia isn't
+  // quite set-up to handle constants yet...
+  /*
+  auto sec_header = xex_security_info();
+  auto heap = memory()->LookupHeap(sec_header->load_address);
+  auto page_size = heap->page_size();
+  for (uint32_t i = 0, page = 0; i < sec_header->page_descriptor_count; i++) {
+    // Byteswap the bitfield manually.
+    xex2_page_descriptor desc;
+    desc.value = xe::byte_swap(sec_header->page_descriptors[i].value);
+
+    auto address = sec_header->load_address + (page * page_size);
+    auto size = desc.size * page_size;
+    switch (desc.info) {
+    case XEX_SECTION_CODE:
+    case XEX_SECTION_READONLY_DATA:
+      heap->Protect(address, size, kMemoryProtectRead);
+      break;
+    case XEX_SECTION_DATA:
+      heap->Protect(address, size, kMemoryProtectRead | kMemoryProtectWrite);
+      break;
+    }
+
+    page += desc.size;
+  }
+  */
+
   return true;
 }