diff --git a/.github/workflows/cl.yml b/.github/workflows/cl.yml
new file mode 100644
index 0000000..194b42e
--- /dev/null
+++ b/.github/workflows/cl.yml
@@ -0,0 +1,65 @@
+name: cl
+
+on:
+  push:
+    branches:
+      - '*'
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  enumerate:
+    runs-on: ubuntu-latest
+    container: ps2dev/ps2dev:latest
+    outputs:
+      matrix: ${{ steps.variants.outputs.matrix }}
+    steps:
+      - name: Install dependencies
+        run: apk add --no-cache build-base git p7zip
+
+      - uses: actions/checkout@v4
+      - name: Configure git
+        run: |
+          git config --global --add safe.directory "$GITHUB_WORKSPACE"
+          git fetch --prune --unshallow || true
+
+      - name: Enumerate variants
+        id: variants
+        run: |
+          matrix=$(make list-variants)
+          echo "matrix=$matrix" >> "$GITHUB_OUTPUT"
+
+  build:
+    needs: enumerate
+    runs-on: ubuntu-latest
+    container: ps2dev/ps2dev:latest
+    strategy:
+      fail-fast: false
+      matrix: ${{ fromJson(needs.enumerate.outputs.matrix) }}
+    steps:
+      - name: Install dependencies
+        run: apk add --no-cache build-base git p7zip
+
+      - uses: actions/checkout@v4
+      - name: Configure git
+        run: |
+          git config --global --add safe.directory "$GITHUB_WORKSPACE"
+          git fetch --prune --unshallow || true
+
+      - name: Compute metadata
+        id: meta
+        run: echo "short_sha=${GITHUB_SHA::7}" >> "$GITHUB_OUTPUT"
+
+      - name: Build ${{ matrix.name }}
+        run: |
+          SHORT_SHA=${{ steps.meta.outputs.short_sha }}
+          OUTDIR="build/variants/${{ matrix.name }}"
+          make VARIANT=${{ matrix.name }} ${{ matrix.flags }} OUTDIR=$OUTDIR COMMIT_HASH=$SHORT_SHA clean
+          make VARIANT=${{ matrix.name }} ${{ matrix.flags }} OUTDIR=$OUTDIR COMMIT_HASH=$SHORT_SHA all
+          test -f "$OUTDIR/BUILD_CONFIG.txt"
+
+      - name: Upload ${{ matrix.name }}
+        uses: actions/upload-artifact@v4
+        with:
+          name: ps2bbl-${{ matrix.name }}-${{ steps.meta.outputs.short_sha }}
+          path: build/variants/${{ matrix.name }}
diff --git a/Makefile b/Makefile
index 13104dd..d0c3c76 100644
--- a/Makefile
+++ b/Makefile
@@ -9,12 +9,14 @@ __________  _________________   ____________________.____
 endef
 export HEADER
 
+# ---{ CANONICAL BUILD OPTIONS }--- #
+VARIANT ?= default
 
-# ---{BUILD CFG}--- #
-HAS_EMBED_IRX ?= 1# whether to embed or not non vital IRX (wich will be loaded from memcard files)
+# Device and platform feature toggles
+HAS_EMBED_IRX ?= 1 # whether to embed or not non vital IRX (wich will be loaded from memcard files)
 DEBUG ?= 0
 CHAINLOAD ?= 0 # Only inits the system and boots CHAINLOAD_PATH from the memory card. If specified file doesn't exist, attempts to boot RESCUE.ELF from USB
-CHAINLOAD_PATH ?= "mc?:BOOT/PAYLOAD.ELF"
+CHAINLOAD_PATH ?= mc?:/BOOT/PAYLOAD.ELF
 PSX ?= 0 # PSX DESR support
 HDD ?= 0 #wether to add internal HDD support
 MMCE ?= 0
@@ -35,9 +37,81 @@ FILEXIO_NEED ?= 0 # if we need filexio and imanx loaded for other features (HDD,
 DEV9_NEED ?= 0    # if we need DEV9 loaded for other features (HDD, UDPTTY, etc)
 
 # Related to binary size reduction (it disables some features, please be sure you won't disable something you need)
-KERNEL_NOPATCH = 1
-NEWLIB_NANO = 1
-DUMMY_TIMEZONE = 1
+KERNEL_NOPATCH ?= 1
+NEWLIB_NANO ?= 1
+DUMMY_TIMEZONE ?= 1
+DUMMY_LIBC_INIT ?= 0
+
+CANONICAL_OPTIONS := HAS_EMBED_IRX DEBUG CHAINLOAD CHAINLOAD_PATH PSX HDD HDD_RUNTIME MMCE MMCE_RUNTIME MX4SIO MX4SIO_RUNTIME \
+                     XFROM XFROM_RUNTIME PROHBIT_DVD_0100 XCDVD_READKEY UDPTTY PPCTTY PRINTF HOMEBREW_IRX FILEXIO_NEED DEV9_NEED \
+                     KERNEL_NOPATCH NEWLIB_NANO DUMMY_TIMEZONE DUMMY_LIBC_INIT
+
+COMMIT_HASH ?= $(shell git rev-parse --short HEAD)
+SUPPRESS_FEATURE_INFO := $(if $(filter list-variants variants,$(MAKECMDGOALS)),1,)
+feature_info = $(if $(SUPPRESS_FEATURE_INFO),,$(info $(1)))
+
+# Normalize optional parameters
+ifeq ($(strip $(PRINTF)),)
+  PRINTF := NONE
+endif
+
+# ---{ OUTPUT LOCATIONS }--- #
+ifndef BINDIR
+  OUTDIR ?= $(if $(filter default,$(VARIANT)),bin,build/out/$(VARIANT))
+  OUTDIR := $(patsubst %/,%,$(OUTDIR))
+  BINDIR := $(OUTDIR)/
+else
+  OUTDIR := $(patsubst %/,%,$(BINDIR))
+  BINDIR := $(OUTDIR)/
+endif
+EE_OBJS_DIR := $(OUTDIR)/obj/
+EE_ASM_DIR := $(OUTDIR)/asm/
+VARIANTS_OUTDIR ?= build/variants
+
+# ---{ VARIANT DEFINITIONS }--- #
+VARIANT_DEFINITIONS := \
+  default: \
+  chainload:CHAINLOAD=1 \
+  hdd:HDD=1 \
+  hdd_chainload:HDD=1,CHAINLOAD=1 \
+  hdd_runtime:HDD_RUNTIME=1 \
+  hdd_runtime_chainload:HDD_RUNTIME=1,CHAINLOAD=1 \
+  mmce:MMCE=1 \
+  mmce_chainload:MMCE=1,CHAINLOAD=1 \
+  mmce_runtime:MMCE_RUNTIME=1 \
+  mmce_runtime_chainload:MMCE_RUNTIME=1,CHAINLOAD=1 \
+  mx4sio:MX4SIO=1 \
+  mx4sio_chainload:MX4SIO=1,CHAINLOAD=1 \
+  mx4sio_runtime:MX4SIO_RUNTIME=1 \
+  mx4sio_runtime_chainload:MX4SIO_RUNTIME=1,CHAINLOAD=1 \
+  xfrom:XFROM=1 \
+  xfrom_chainload:XFROM=1,CHAINLOAD=1 \
+  xfrom_runtime:XFROM_RUNTIME=1 \
+  xfrom_runtime_chainload:XFROM_RUNTIME=1,CHAINLOAD=1 \
+  psx:PSX=1 \
+  psx_chainload:PSX=1,CHAINLOAD=1 \
+  psx_hdd:PSX=1,HDD=1 \
+  psx_hdd_chainload:PSX=1,HDD=1,CHAINLOAD=1 \
+  psx_hdd_runtime:PSX=1,HDD_RUNTIME=1 \
+  psx_hdd_runtime_chainload:PSX=1,HDD_RUNTIME=1,CHAINLOAD=1 \
+  psx_mmce:PSX=1,MMCE=1 \
+  psx_mmce_chainload:PSX=1,MMCE=1,CHAINLOAD=1 \
+  psx_mmce_runtime:PSX=1,MMCE_RUNTIME=1 \
+  psx_mmce_runtime_chainload:PSX=1,MMCE_RUNTIME=1,CHAINLOAD=1 \
+  psx_mx4sio:PSX=1,MX4SIO=1 \
+  psx_mx4sio_chainload:PSX=1,MX4SIO=1,CHAINLOAD=1 \
+  psx_mx4sio_runtime:PSX=1,MX4SIO_RUNTIME=1 \
+  psx_mx4sio_runtime_chainload:PSX=1,MX4SIO_RUNTIME=1,CHAINLOAD=1 \
+  psx_xfrom:PSX=1,XFROM=1 \
+  psx_xfrom_chainload:PSX=1,XFROM=1,CHAINLOAD=1 \
+  psx_xfrom_runtime:PSX=1,XFROM_RUNTIME=1 \
+  psx_xfrom_runtime_chainload:PSX=1,XFROM_RUNTIME=1,CHAINLOAD=1 \
+  udptty:UDPTTY=1 \
+  ppctty:PPCTTY=1
+
+variant_name = $(word 1,$(subst :, ,$1))
+variant_flags = $(wordlist 2,200,$(subst :, ,$1))
+variant_json = {"name":"$(call variant_name,$1)","flags":"$(strip $(call variant_flags,$1))"}
 
 # ---{ VERSIONING }--- #
 
@@ -48,13 +122,13 @@ STATUS = Beta
 
 # ---{ EXECUTABLES }--- #
 
-BINDIR ?= bin/
 BASENAME ?= PS2BBL
 EE_BIN = $(BINDIR)$(BASENAME).ELF
 EE_BIN_STRIPPED = $(BINDIR)stripped_$(BASENAME).ELF
 EE_BIN_PACKED = $(BINDIR)COMPRESSED_$(BASENAME).ELF
 KELFTYPE ?= MC
 EE_BIN_ENCRYPTED = $(BINDIR)$(BASENAME)_$(KELFTYPE).KELF
+BUILD_CONFIG = $(OUTDIR)/BUILD_CONFIG.txt
 
 # ---{ OBJECTS & STUFF }--- #
 
@@ -85,10 +159,29 @@ ifneq ($(VERBOSE), 1)
    .SILENT:
 endif
 
+# ---{ VALIDATION }--- #
+ifeq ($(filter 0 1,$(HAS_EMBED_IRX)),)
+  $(error HAS_EMBED_IRX must be 0 or 1)
+endif
+ifeq ($(filter 0 1,$(DEBUG)),)
+  $(error DEBUG must be 0 or 1)
+endif
+ifeq ($(filter 0 1,$(CHAINLOAD)),)
+  $(error CHAINLOAD must be 0 or 1)
+endif
+ifeq ($(filter 0 1,$(PSX)),)
+  $(error PSX must be 0 or 1)
+endif
+ifeq ($(filter 0 1,$(HDD) $(HDD_RUNTIME) $(MMCE) $(MMCE_RUNTIME) $(MX4SIO) $(MX4SIO_RUNTIME) $(XFROM) $(XFROM_RUNTIME) $(UDPTTY) $(PPCTTY)),)
+  $(error Storage/debug feature toggles must be 0 or 1)
+endif
+ifeq ($(filter NONE PRINTF EE_SIO SCR,$(PRINTF)),)
+  $(error PRINTF must be one of: NONE, PRINTF, EE_SIO, SCR)
+endif
+
 ifeq ($(CHAINLOAD), 1)
   HAS_EMBED_IRX = 1
   EE_CFLAGS += -DCHAINLOAD -DCHAINLOAD_PATH=\"$(CHAINLOAD_PATH)\"
-  undefine EMBEDDED_STUFF
 endif
 
 ifeq ($(MX4SIO), 1)
@@ -117,6 +210,7 @@ endif
 ifeq ($(MX4SIO_RUNTIME), 1)
   HOMEBREW_IRX = 1
   FILEXIO_NEED = 1
+  EE_OBJS += mx4sio_bd_irx.o
   EE_CFLAGS += -DMX4SIO_RUNTIME
   ifeq ($(MX4SIO), 1)
     $(error MX4SIO_RUNTIME cant coexist with MX4SIO)
@@ -135,6 +229,7 @@ endif
 ifeq ($(MMCE_RUNTIME), 1)
   HOMEBREW_IRX = 1
   FILEXIO_NEED = 1
+  EE_OBJS += mmceman_irx.o
   EE_CFLAGS += -DMMCE_RUNTIME
   ifeq ($(MMCE), 1)
     $(error MMCE_RUNTIME cant coexist with MMCE)
@@ -152,28 +247,30 @@ endif
 
 ifeq ($(XFROM), 1)
   FILEXIO_NEED = 1
+  EE_OBJS += xfromman_irx.o extflash_irx.o
   EE_CFLAGS += -DXFROM
 endif
 
 ifeq ($(XFROM_RUNTIME), 1)
   FILEXIO_NEED = 1
+  EE_OBJS += xfromman_irx.o extflash_irx.o
   EE_CFLAGS += -DXFROM_RUNTIME
 endif
 
 ifeq ($(HOMEBREW_IRX), 1)
-   $(info --- enforcing usage of homebrew IRX modules)
+   $(call feature_info,--- enforcing usage of homebrew IRX modules)
    USE_ROM_PADMAN = 0
    USE_ROM_MCMAN = 0
    USE_ROM_SIO2MAN = 0
 else
-   $(info --- using BOOT-ROM drivers)
+   $(call feature_info,--- using BOOT-ROM drivers)
    USE_ROM_PADMAN = 1
    USE_ROM_MCMAN = 1
    USE_ROM_SIO2MAN = 1
 endif
 
 ifeq ($(PSX), 1)
-   $(info --- building with PSX-DESR support)
+   $(call feature_info,--- building with PSX-DESR support)
   BASENAME = PSXBBL
   EE_CFLAGS += -DPSX=1
   EE_OBJS += scmd_add.o ioprp.o
@@ -183,7 +280,7 @@ else
 endif
 
 ifeq ($(DEBUG), 1)
-   $(info --- debugging enabled)
+   $(call feature_info,--- debugging enabled)
   EE_CFLAGS += -DDEBUG -O0 -g
   EE_LIBS += -lelf-loader
 else
@@ -214,15 +311,15 @@ else
 endif
 
 ifeq ($(HAS_EMBED_IRX), 1)
-  $(info --- USB drivers will be embedded)
+  $(call feature_info,--- USB drivers will be embedded)
   EE_OBJS += usbd_irx.o bdm_irx.o bdmfs_fatfs_irx.o usbmass_bd_irx.o
   EE_CFLAGS += -DHAS_EMBEDDED_IRX
 else
-  $(info --- USB drivers will be external)
+  $(call feature_info,--- USB drivers will be external)
 endif
 
 ifeq ($(HDD), 1)
-  $(info --- compiling with HDD support)
+  $(call feature_info,--- compiling with HDD support)
   EE_LIBS += -lpoweroff
   EE_OBJS += ps2fs_irx.o ps2hdd_irx.o ps2atad_irx.o poweroff_irx.o
   EE_CFLAGS += -DHDD
@@ -232,7 +329,7 @@ ifeq ($(HDD), 1)
 endif
 
 ifeq ($(HDD_RUNTIME), 1)
-  $(info --- runtime HDD enablement support enabled)
+  $(call feature_info,--- runtime HDD enablement support enabled)
   EE_CFLAGS += -DHDD_RUNTIME
   FILEXIO_NEED = 1
   DEV9_NEED = 1
@@ -240,7 +337,7 @@ ifeq ($(HDD_RUNTIME), 1)
 endif
 
 ifeq ($(UDPTTY), 1)
-  $(info --- UDPTTY enabled)
+  $(call feature_info,--- UDPTTY enabled)
   EE_CFLAGS += -DUDPTTY
   EE_OBJS += udptty_irx.o ps2ip_irx.o netman_irx.o smap_irx.o
   DEV9_NEED = 1
@@ -248,7 +345,7 @@ ifeq ($(UDPTTY), 1)
     PRINTF = PRINTF
   endif
 else ifeq ($(PPCTTY), 1)
-  $(info --- PPCTTY enabled)
+  $(call feature_info,--- PPCTTY enabled)
   EE_CFLAGS += -DPPCTTY
   EE_OBJS += ppctty_irx.o
   ifneq ($(PRINTF), EE_SIO) # only enable common printf if EE_SIO is disabled. this allows separating EE and IOP printf
@@ -257,7 +354,7 @@ else ifeq ($(PPCTTY), 1)
 endif
 
 ifeq ($(FILEXIO_NEED), 1)
-  $(info --- FILEXIO will be included)
+  $(call feature_info,--- FILEXIO will be included)
   EE_CFLAGS += -DFILEXIO
   EE_LIBS += -lfileXio
   EE_OBJS += filexio_irx.o iomanx_irx.o
@@ -267,6 +364,10 @@ ifeq ($(DUMMY_TIMEZONE), 1)
   EE_CFLAGS += -DDUMMY_TIMEZONE
 endif
 
+ifeq ($(NEWLIB_NANO), 1)
+  EE_CFLAGS += -DNEWLIB_NANO
+endif
+
 ifeq ($(DEV9_NEED), 1)
   EE_CFLAGS += -DDEV9
   EE_OBJS += ps2dev9_irx.o
@@ -288,15 +389,15 @@ endif
 
 ifeq ($(PRINTF), NONE)
 else ifeq ($(PRINTF), SCR)
-  $(info --- SCR Printf enabled)
+  $(call feature_info,--- SCR Printf enabled)
   EE_CFLAGS += -DSCR_PRINT
 else ifeq ($(PRINTF), EE_SIO)
-  $(info --- EESIO Printf enabled)
+  $(call feature_info,--- EESIO Printf enabled)
   EE_CFLAGS += -DEE_SIO_DEBUG
   EE_LIBS += -lsiocookie
   EE_OBJS += sioprintf.o
 else ifeq ($(PRINTF), PRINTF)
-  $(info --- Common Printf enabled)
+  $(call feature_info,--- Common Printf enabled)
   EE_CFLAGS += -DCOMMON_PRINTF
 else ifneq ($(PRINTF),)
   $(warning UNKNOWN PRINTF REQUESTED: '$(PRINTF)')
@@ -311,15 +412,15 @@ ifeq ($(PROHBIT_DVD_0100),1)
 endif
 
 # ---{ RECIPES }--- #
-.PHONY: greeting debug all clean kelf packed release
+.PHONY: greeting debug all clean kelf packed release variants list-variants
 
-all: $(EE_BIN)
+all: $(EE_BIN) $(BUILD_CONFIG)
 ifeq (DEBUG, 1)
 	$(MAKE) greeting
 endif
 rebuild: clean packed
 
-packed: $(EE_BIN_PACKED)
+packed: $(EE_BIN_PACKED) $(BUILD_CONFIG)
 
 greeting:
 	@echo built PS2BBL PSX=$(PSX), LOCAL_IRX=$(HAS_EMBED_IRX), DEBUG=$(DEBUG)
@@ -329,12 +430,12 @@ greeting:
 	@echo printf=$(PRINTF)
 	@echo $(EE_OBJS)
 
-release: clean $(EE_BIN_PACKED)
+release: clean $(EE_BIN_PACKED) $(BUILD_CONFIG)
 	@rm -f $(EE_BIN_STRIPPED)
 	@echo "$$HEADER"
 
 clean:
-	@rm -rf $(EE_BIN) $(EE_BIN_STRIPPED) $(EE_BIN_ENCRYPTED) $(EE_BIN_PACKED)
+	@rm -rf $(EE_BIN) $(EE_BIN_STRIPPED) $(EE_BIN_ENCRYPTED) $(EE_BIN_PACKED) $(BUILD_CONFIG)
 	@rm -rf $(EE_OBJS_DIR) $(EE_ASM_DIR)
 
 $(EE_BIN_STRIPPED): $(EE_BIN)
@@ -358,6 +459,19 @@ else ifeq ($(KELFTYPE), HDD)
 else
 	$(error UNKNOWN KELF TYPE: '$(KELFTYPE)')
 endif
+
+$(BUILD_CONFIG): $(EE_BIN)
+	@mkdir -p $(OUTDIR)
+	@echo "VARIANT=$(VARIANT)" > $@
+	@echo "COMMIT_HASH=$(COMMIT_HASH)" >> $@
+	@echo "UTC_TIME=$(shell date -u '+%Y-%m-%dT%H:%M:%SZ')" >> $@
+	@echo "OUTDIR=$(OUTDIR)" >> $@
+	@echo "BASENAME=$(BASENAME)" >> $@
+	@echo "OPTIONS" >> $@
+	@for opt in $(CANONICAL_OPTIONS); do echo "  $$opt=$($(opt))"; done >> $@
+	@echo "MAKEOVERRIDES=$(MAKEOVERRIDES)" >> $@
+	@echo "CFLAGS=$(EE_CFLAGS)" >> $@
+	@echo "DEFINES=$(filter -D%,$(EE_CFLAGS))" >> $@
 # move OBJ to folder and search source on src/, borrowed from OPL makefile
 
 EE_OBJS := $(EE_OBJS:%=$(EE_OBJS_DIR)%) # remap all EE_OBJ to obj subdir
@@ -389,6 +503,31 @@ ifneq ($(VERBOSE),1)
 	@echo "  - $@"
 endif
 	$(EE_AS) $(EE_ASFLAGS) $< -o $@
+
+list-variants:
+	@sep=""
+	@printf '{"include":['
+	@for entry in $(VARIANT_DEFINITIONS); do \
+		name=$${entry%%:*}; \
+		flags=$${entry#*:}; \
+		if [ "$$entry" = "$$name" ]; then flags=""; fi; \
+		flags=$$(echo "$$flags" | sed 's/,/ /g'); \
+		printf '%s{"name":"%s","flags":"%s"}' "$$sep" "$$name" "$$flags"; \
+		sep=","; \
+	done; \
+	printf ']}\n'
+
+variants:
+	@set -e; \
+	for entry in $(VARIANT_DEFINITIONS); do \
+		name=$${entry%%:*}; \
+		flags=$${entry#*:}; \
+		if [ "$$entry" = "$$name" ]; then flags=""; fi; \
+		flags=$$(echo "$$flags" | sed 's/,/ /g'); \
+		odir="$(VARIANTS_OUTDIR)/$$name"; \
+		$(MAKE) VARIANT=$$name OUTDIR=$$odir $$flags clean >/dev/null; \
+		$(MAKE) VARIANT=$$name OUTDIR=$$odir $$flags all; \
+	done
 #
 analize:
 	$(MAKE) rebuild DEBUG=1
@@ -402,6 +541,10 @@ banner:
 	@echo "$$HEADER"
 
 # Include makefiles
-include $(PS2SDK)/samples/Makefile.pref
-include $(PS2SDK)/samples/Makefile.eeglobal
-include embed.make
+ifneq ($(filter list-variants,$(MAKECMDGOALS)),)
+  # Skip heavy includes when only enumerating variants
+else
+  include $(PS2SDK)/samples/Makefile.pref
+  include $(PS2SDK)/samples/Makefile.eeglobal
+  include embed.make
+endif
diff --git a/include/irx_import.h b/include/irx_import.h
index a10ea3f..e37a146 100644
--- a/include/irx_import.h
+++ b/include/irx_import.h
@@ -15,7 +15,7 @@ IMPORT_BIN2C(padman_irx);
 IMPORT_BIN2C(psx_ioprp);
 #endif
 
-#ifdef MMCE
+#if defined(MMCE) || defined(MMCE_RUNTIME)
 IMPORT_BIN2C(mmceman_irx);
 #endif
 
@@ -31,6 +31,11 @@ IMPORT_BIN2C(ps2hdd_irx);
 IMPORT_BIN2C(ps2fs_irx);
 #endif
 
+#if defined(XFROM) || defined(XFROM_RUNTIME)
+IMPORT_BIN2C(xfromman_irx);
+IMPORT_BIN2C(extflash_irx);
+#endif
+
 #ifdef UDPTTY
 IMPORT_BIN2C(ps2ip_irx);
 IMPORT_BIN2C(udptty_irx);
@@ -38,7 +43,7 @@ IMPORT_BIN2C(netman_irx);
 IMPORT_BIN2C(smap_irx);
 #endif
 
-#ifdef MX4SIO
+#if defined(MX4SIO) || defined(MX4SIO_RUNTIME)
 IMPORT_BIN2C(mx4sio_bd_irx);
 #ifdef USE_ROM_SIO2MAN
 #error MX4SIO needs Homebrew SIO2MAN to work
diff --git a/src/main.c b/src/main.c
index c422914..08754d3 100644
--- a/src/main.c
+++ b/src/main.c
@@ -36,6 +36,8 @@ static const char *const DEFAULT_CONFIG_PATHS[SOURCE_COUNT] = {
 };
 const char *CONFIG_PATHS[SOURCE_COUNT];
 
+static int LocateExternalIRXPath(const char *filename, char *resolved_path, size_t resolved_size);
+
 const char *const DEFPATH[] = {
     "mc?:/BOOT/BOOT.ELF", // AUTO [0]
     "mc?:/BOOT/BOOT2.ELF",