diff --git a/Changelog.md b/Changelog.md
index d0bcc6edf59..0ec786bb4e7 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -11,6 +11,8 @@ OpenCore Changelog
 - Fixed assert caused by dependency ordering in OpenDuet
 - Prevented assert in normal situation when freeing memory above 4GB in OpenDuet
 - Prevented debug assert reporting that optional Hii protocols are not present in OpenDuet
+- Fixed problem loading non-firmware runtime drivers (e.g. OpenRuntime.efi) in OpenDuet
+- Resolved issue using NOOPT debugging in OpenDuet
 
 #### v0.9.9
 - Fixed incorrect warning in ocvalidate
diff --git a/Legacy/BootSector/Makefile b/Legacy/BootSector/Makefile
index 12f60c3490e..577f56c9df7 100644
--- a/Legacy/BootSector/Makefile
+++ b/Legacy/BootSector/Makefile
@@ -10,6 +10,10 @@ PRODUCTS64=$(BINDIR)/StartX64_$(PAGE_TABLE).com $(BINDIR)/StartX64_$(PAGE_TABLE_
 
 all: $(PRODUCTS32) $(PRODUCTS64)
 
+IA32: $(PRODUCTS32)
+
+X64: $(PRODUCTS64)
+
 clean:
 	$(RM) -f $(BINDIR)/*.com
 
diff --git a/OpenCorePkg.dsc b/OpenCorePkg.dsc
index be304b49929..d5d157a6357 100755
--- a/OpenCorePkg.dsc
+++ b/OpenCorePkg.dsc
@@ -406,7 +406,6 @@
   gEfiMdePkgTokenSpaceGuid.PcdImageLoaderAlignmentPolicy|0xFFFFFFFF
   gEfiMdePkgTokenSpaceGuid.PcdImageLoaderRelocTypePolicy|0xFFFFFFFF
   gEfiMdePkgTokenSpaceGuid.PcdImageProtectionPolicy|0x00000003
-  gEfiMdePkgTokenSpaceGuid.PcdUefiImageFormatSupportNonFv|0x01
 
 [PcdsPatchableInModule]
   gEfiMdeModulePkgTokenSpaceGuid.PcdSerialRegisterAccessWidth|8
diff --git a/OpenDuetPkg.dsc b/OpenDuetPkg.dsc
index 60366885052..82021d3cedf 100644
--- a/OpenDuetPkg.dsc
+++ b/OpenDuetPkg.dsc
@@ -146,8 +146,6 @@
       DxeServicesTableLib|MdeModulePkg/Library/DxeCoreDxeServicesTableLib/DxeCoreDxeServicesTableLib.inf
       UefiBootServicesTableLib|MdeModulePkg/Library/DxeCoreUefiBootServicesTableLib/DxeCoreUefiBootServicesTableLib.inf
       UefiRuntimeServicesTableLib|MdeModulePkg/Library/DxeCoreUefiRuntimeServicesTableLib/DxeCoreUefiRuntimeServicesTableLib.inf
-    <PcdsFixedAtBuild>
-      gEfiMdePkgTokenSpaceGuid.PcdUefiImageFormatSupportFv|0x03
   }
 
   MdeModulePkg/Universal/PCD/Dxe/Pcd.inf
@@ -182,7 +180,10 @@
   MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf
   OpenCorePkg/Legacy/BootPlatform/SmbiosGenDxe/SmbiosGen.inf
 
+!if $(TARGET) != NOOPT
+  # We will reuse DEBUG EfiLdr in NOOPT build to keep within allotted 0x10000-0x20000 space.
   OpenCorePkg/Legacy/BootPlatform/EfiLdr/EfiLdr.inf
+!endif
   OpenCorePkg/Legacy/BootPlatform/BdsDxe/BdsDxe.inf {
     <LibraryClasses>
       PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
@@ -290,8 +291,8 @@
   gEfiMdePkgTokenSpaceGuid.PcdImageLoaderAllowMisalignedOffset|TRUE
 
 [BuildOptions]
-  MSFT:NOOPT_*_*_CC_FLAGS    = -D OC_TARGET_RELEASE=1 /FAcs -Dinline=__inline  /GS /kernel
-  MSFT:DEBUG_*_*_CC_FLAGS    = -D OC_TARGET_RELEASE=1 /FAcs -Dinline=__inline -DMDEPKG_NDEBUG /GS /kernel
+  MSFT:NOOPT_*_*_CC_FLAGS    = -D OC_TARGET_RELEASE=1 /FAcs -Dinline=__inline /GS /kernel
+  MSFT:DEBUG_*_*_CC_FLAGS    = -D OC_TARGET_RELEASE=1 /FAcs -Dinline=__inline /GS /kernel
   MSFT:RELEASE_*_*_CC_FLAGS  = -D OC_TARGET_RELEASE=1 /FAcs -Dinline=__inline -DMDEPKG_NDEBUG /GS /kernel
 
   XCODE:NOOPT_*_*_CC_FLAGS   = -D OC_TARGET_RELEASE=1 -fno-unwind-tables -O0 -fstack-protector-strong -ftrivial-auto-var-init=pattern
@@ -299,9 +300,9 @@
   XCODE:RELEASE_*_*_CC_FLAGS = -D OC_TARGET_RELEASE=1 -fno-unwind-tables -flto -Os -DMDEPKG_NDEBUG -fstack-protector-strong -ftrivial-auto-var-init=pattern
 
   GCC:NOOPT_*_*_CC_FLAGS     = -D OC_TARGET_RELEASE=1 -Wno-unused-but-set-variable -fstack-protector-strong -mstack-protector-guard=global -Wuninitialized
-  GCC:DEBUG_*_*_CC_FLAGS     = -D OC_TARGET_RELEASE=1 -DMDEPKG_NDEBUG -Wno-unused-but-set-variable -fstack-protector-strong -mstack-protector-guard=global -Wuninitialized
+  GCC:DEBUG_*_*_CC_FLAGS     = -D OC_TARGET_RELEASE=1 -Wno-unused-but-set-variable -fstack-protector-strong -mstack-protector-guard=global -Wuninitialized
   GCC:RELEASE_*_*_CC_FLAGS   = -D OC_TARGET_RELEASE=1 -DMDEPKG_NDEBUG -Wno-unused-but-set-variable -fstack-protector-strong -mstack-protector-guard=global -Wuninitialized
 
   CLANGGCC:NOOPT_*_*_CC_FLAGS     = -D OC_TARGET_RELEASE=1 -Wno-unused-but-set-variable -fstack-protector-strong -mstack-protector-guard=global -Wuninitialized
-  CLANGGCC:DEBUG_*_*_CC_FLAGS     = -D OC_TARGET_RELEASE=1 -DMDEPKG_NDEBUG -Wno-unused-but-set-variable -fstack-protector-strong -mstack-protector-guard=global -Wuninitialized
+  CLANGGCC:DEBUG_*_*_CC_FLAGS     = -D OC_TARGET_RELEASE=1 -Wno-unused-but-set-variable -fstack-protector-strong -mstack-protector-guard=global -Wuninitialized
   CLANGGCC:RELEASE_*_*_CC_FLAGS   = -D OC_TARGET_RELEASE=1 -DMDEPKG_NDEBUG -Wno-unused-but-set-variable -fstack-protector-strong -mstack-protector-guard=global -Wuninitialized
diff --git a/OpenDuetPkgDefines.fdf.inc b/OpenDuetPkgDefines.fdf.inc
index 013d6467b92..f7487cf5ec5 100644
--- a/OpenDuetPkgDefines.fdf.inc
+++ b/OpenDuetPkgDefines.fdf.inc
@@ -20,7 +20,7 @@
   NumBlocks          = 0x8        #GenFv image size 0x80000
 !else
 !if ($(TARGET) == DEBUG)
-  NumBlocks          = 0xd        #GenFv image size 0xd0000
+  NumBlocks          = 0xe        #GenFv image size 0xe0000
 !else
   NumBlocks          = 0x24       #GenFv image size 0x240000
 !endif
diff --git a/build_duet.tool b/build_duet.tool
index 82ffde0623d..43e984fddaa 100755
--- a/build_duet.tool
+++ b/build_duet.tool
@@ -36,8 +36,12 @@ imgbuild() {
     "${BUILD_DIR_ARCH}/DxeIplUe.raw" || exit 1
 
   echo "Generating Loader Image..."
-
-  ImageTool GenImage -c PE -x -b 0x10000 -o "${BUILD_DIR_ARCH}/EfiLoaderRebased.efi" "${BUILD_DIR_ARCH}/EfiLoader.efi" || exit 1
+  # Reuse DEBUG EfiLdr in NOOPT build to keep within allotted 0x10000-0x20000 space.
+  # With this approach, everything after EfiLdr is fully NOOPT, but EfiLdr starts.
+  # TODO: Look at moving EFILDR_BASE_SEGMENT (see also kBoot2Segment, BASE_ADDR_32)
+  # to make space for NOOPT loader.
+  SAFE_LOADER=$(echo "${BUILD_DIR_ARCH}/EfiLoader.efi" | sed -e 's/NOOPT/DEBUG/')
+  ImageTool GenImage -c PE -x -b 0x10000 -o "${BUILD_DIR_ARCH}/EfiLoaderRebased.efi" "${SAFE_LOADER}" || exit 1
 
   "${FV_TOOLS}/EfiLdrImage" -o "${BUILD_DIR}/FV/Efildr${arch}" \
     "${BUILD_DIR_ARCH}/EfiLoaderRebased.efi" "${BUILD_DIR}/FV/DxeIpl${arch}.z" \
@@ -77,7 +81,7 @@ imgbuild() {
   # Build bootsectors.
   mkdir -p "${BOOTSECTORS}" || exit 1
   cd "${BOOTSECTORS}"/.. || exit 1
-  make || exit 1
+  make "${arch}" || exit 1
   cd - || exit 1
 
   # Concatenate bootsector into the resulting image.