diff --git a/_projects/sparcv8leon3-gr716-mimas/build.project b/_projects/sparcv8leon3-gr716-mimas/build.project
index 093ed972..028be321 100644
--- a/_projects/sparcv8leon3-gr716-mimas/build.project
+++ b/_projects/sparcv8leon3-gr716-mimas/build.project
@@ -8,31 +8,16 @@
 
 [ "${BASH_SOURCE[0]}" -ef "$0" ] && echo "You should source this script, not execute it!" && exit 1
 
-BOOT_DEVICE="uart0"
+# no NVM storage, all programs are being loaded via UART
+export BOOT_DEVICE="uart0"
 
 export PLO_DEVICES="gpio-gr716 uart-grlib"
 
-PREINIT_SCRIPT=(
-	"map ocram 0x31000000 0x3101FFFF rwx"
-	"map extram 0x40000000 0x401FFFFF rwx"
-	"phfs uart0 0.0 phoenixd"
-	"console 0.1"
-)
-
-
-USER_SCRIPT=(
-	"kernel ${BOOT_DEVICE}"
-	"app ${BOOT_DEVICE} -x dummyfs extram extram"
-	"app ${BOOT_DEVICE} -x grlib-multi extram extram"
-	"app ${BOOT_DEVICE} -x psh extram extram"
-	"wait 500"
-	"go!"
-)
-
-
-b_convert_project() {
+prepare_plo_img() {
+	#TODO: consider using nvm.yaml for merging header with plo
 	local f="${PREFIX_PROG_STRIPPED}plo-${TARGET_FAMILY}-${TARGET_SUBFAMILY}.img"
 	local sz=$(stat -c%s "$f")
+	#TODO: why "- 4" ?
 	sz=$(((sz - 4)/4))
 	printf "\xde\xad\xbe\xef" > "$PREFIX_BOOT/plo.img"
 	printf "%08X" $sz | xxd -r -p >> "$PREFIX_BOOT/plo.img"
@@ -42,10 +27,15 @@ b_convert_project() {
 
 
 b_image_project () {
-	cp "${PREFIX_PROG_STRIPPED}phoenix-${TARGET_FAMILY}-${TARGET_SUBFAMILY}.elf" "$PREFIX_BOOT/"
-	cp "${PREFIX_PROG_STRIPPED}dummyfs" "$PREFIX_BOOT/"
-	cp "${PREFIX_PROG_STRIPPED}grlib-multi" "$PREFIX_BOOT/"
-	cp "${PREFIX_PROG_STRIPPED}psh" "$PREFIX_BOOT/"
+	prepare_plo_img;
+
+	# no NVM storage, all programs are being loaded via UART - prepare user.plo and all binaries in "PREFIX_BOOT"
+	image_builder.py script --nvm "$NVM_CONFIG" --script "$PLO_SCRIPT_USER" --out "${PREFIX_BOOT}/user.plo"
+
+	cp -a "${PREFIX_PROG_STRIPPED}phoenix-${TARGET_FAMILY}-${TARGET_SUBFAMILY}.elf" "$PREFIX_BOOT/"
+	cp -a "${PREFIX_PROG_STRIPPED}dummyfs" "$PREFIX_BOOT/"
+	cp -a "${PREFIX_PROG_STRIPPED}grlib-multi" "$PREFIX_BOOT/"
+	cp -a "${PREFIX_PROG_STRIPPED}psh" "$PREFIX_BOOT/"
 
 	b_log "The images have been built for the ${TARGET} platform"
 }
diff --git a/_projects/sparcv8leon3-gr716-mimas/preinit.yaml b/_projects/sparcv8leon3-gr716-mimas/preinit.yaml
new file mode 100644
index 00000000..f423fd77
--- /dev/null
+++ b/_projects/sparcv8leon3-gr716-mimas/preinit.yaml
@@ -0,0 +1,18 @@
+size: 0x1000
+is_relative: False
+
+contents:
+  - map ocram 0x31000000 0x3101FFFF rwx
+  - map extram 0x40000000 0x401FFFFF rwx
+  - phfs uart0 0.0 phoenixd
+  - console 0.1
+
+  - if: '{{ not(env.RAM_SCRIPT) | default(false) }}'
+    action: call
+    set_base: True
+    device: '{{ env.BOOT_DEVICE }}'
+    filename: user.plo
+    offset: 0 # BOOT_DEVICE is UART, offset doesn't matter?
+    target_magic: '{{ env.MAGIC_USER_SCRIPT }}'
+
+
diff --git a/_projects/sparcv8leon3-gr716-mimas/user.plo.yaml b/_projects/sparcv8leon3-gr716-mimas/user.plo.yaml
new file mode 100644
index 00000000..fba9a991
--- /dev/null
+++ b/_projects/sparcv8leon3-gr716-mimas/user.plo.yaml
@@ -0,0 +1,13 @@
+# kernel + initrd
+magic: '{{ env.MAGIC_USER_SCRIPT }}'
+size: 0x1000
+is_relative: True
+
+contents:
+  - kernel {{ env.BOOT_DEVICE }}
+  - app {{ env.BOOT_DEVICE }} -x dummyfs extram extram
+  - app {{ env.BOOT_DEVICE }} -x grlib-multi extram extram
+  - app {{ env.BOOT_DEVICE }} -x psh extram extram
+  - wait 2000
+  - go!
+
diff --git a/_projects/sparcv8leon3-gr716-mini/build.project b/_projects/sparcv8leon3-gr716-mini/build.project
index 394b756f..05af3e25 100644
--- a/_projects/sparcv8leon3-gr716-mini/build.project
+++ b/_projects/sparcv8leon3-gr716-mini/build.project
@@ -10,12 +10,19 @@
 
 export PLO_DEVICES="gpio-gr716 uart-grlib flash-gr716"
 
-b_convert_project() {
-	./phoenix-rtos-build/scripts/gr716-convert.py "${PREFIX_PROG_STRIPPED}plo-${TARGET_FAMILY}-${TARGET_SUBFAMILY}.elf" -o "${PREFIX_PROG_STRIPPED}plo-${TARGET_FAMILY}-${TARGET_SUBFAMILY}.img"
-	./phoenix-rtos-build/scripts/gr716-bch.py "${PREFIX_PROG_STRIPPED}plo-${TARGET_FAMILY}-${TARGET_SUBFAMILY}.img" "$PREFIX_BOOT/plo.bch"
+prepare_plo_img() {
+	#FIXME: img file already produced by the plo make, change the output filename
+	FLASH_SIZE=$(image_builder.py query --nvm "$NVM_CONFIG" '{{ nvm.flash0._meta.size }}')
+	gr716-convert.py "${PREFIX_PROG_STRIPPED}plo-${TARGET_FAMILY}-${TARGET_SUBFAMILY}.elf" -o "${PREFIX_PROG_STRIPPED}plo-${TARGET_FAMILY}-${TARGET_SUBFAMILY}.img"
+	gr716-bch.py -s "$FLASH_SIZE" "${PREFIX_PROG_STRIPPED}plo-${TARGET_FAMILY}-${TARGET_SUBFAMILY}.img" "$PREFIX_BOOT/plo.bch"
 }
 
 
 b_image_project () {
+	prepare_plo_img;
+
+	image_builder.py -v partition --nvm "$NVM_CONFIG" --name kernel --script "$PLO_SCRIPT_USER"
+	image_builder.py -v disk --nvm "$NVM_CONFIG" --name flash0 --part "plo=${PREFIX_PROG_STRIPPED}plo-${TARGET_FAMILY}-${TARGET_SUBFAMILY}.img" --out "phoenix.disk"
+
 	b_log "The images have been built for the ${TARGET} platform"
 }
diff --git a/_targets/sparcv8leon3/generic/build.project b/_targets/sparcv8leon3/generic/build.project
index 0a99571b..3c38aeff 100644
--- a/_targets/sparcv8leon3/generic/build.project
+++ b/_targets/sparcv8leon3/generic/build.project
@@ -30,30 +30,13 @@ export PORTS_CURL=n
 #
 # Platform dependent parameters
 #
-SIZE_PAGE=$((0x1000))
-PAGE_MASK=$((~(SIZE_PAGE - 1)))
-KERNEL_OFFS=$((0x10000))
+export SIZE_PAGE=$((0x1000))
 
-BOOT_DEVICE="ram0"                # Default boot device
-NAME_USER_SCRIPT="user.plo"       # User script name
-OFFS_USER_SCRIPT=$((0xf000))
-MAGIC_USER_SCRIPT=$((0xdabaabad)) # User script magic value
-
-
-PREINIT_SCRIPT=(
-	"map sram 0x40000000 0x47ffffff rwx"
-	"console 0.0"
-	"phfs ram0 4.0 raw"
-)
-
-USER_SCRIPT=(
-	"kernel ${BOOT_DEVICE}"
-	"app ${BOOT_DEVICE} -x dummyfs sram sram"
-	"app ${BOOT_DEVICE} -x grlib-uart sram sram"
-	"app ${BOOT_DEVICE} -x psh sram sram"
-	"wait 500"
-	"go!"
-)
+#
+# Project specific build
+#
+export BOOT_DEVICE="ram0"
+export MAGIC_USER_SCRIPT=dabaabad
 
 
 b_build_project() {
@@ -66,19 +49,17 @@ b_build_target() {
 	b_log "Building $TARGET project"
 	b_log "Building phoenix-rtos-loader"
 
-	b_mkscript_preinit
-
-	make -C plo all
+	image_builder.py script --nvm "$NVM_CONFIG" --script "$PLO_SCRIPT_PREINIT" --out script.plo
+	RAM_SCRIPT=1 image_builder.py script --nvm "$NVM_CONFIG" --script "$PLO_SCRIPT_PREINIT" --out script-ram.plo
+	make -C plo base
 
-	cp "${PREFIX_PROG_STRIPPED}plo-${TARGET_FAMILY}-${TARGET_SUBFAMILY}.elf" "${PREFIX_BOOT}/plo.elf"
+	cp -a "${PREFIX_PROG_STRIPPED}plo-${TARGET_FAMILY}-${TARGET_SUBFAMILY}.elf" "${PREFIX_BOOT}/plo.elf"
 }
 
 
 b_image_target() {
-	b_mkscript_user "${USER_SCRIPT[@]}"
-	cp "$PLO_SCRIPT_DIR/$NAME_USER_SCRIPT" "${PREFIX_BOOT}"
-
-	b_prod_image
+	image_builder.py -v partition --nvm "$NVM_CONFIG" --name kernel --script "$PLO_SCRIPT_USER"
+	image_builder.py -v disk --nvm "$NVM_CONFIG" --name flash0 --part "plo=${PREFIX_PROG_STRIPPED}plo-${TARGET_FAMILY}-${TARGET_SUBFAMILY}.img" --out "phoenix.disk"
 }
 
 
diff --git a/_targets/sparcv8leon3/generic/nvm.yaml b/_targets/sparcv8leon3/generic/nvm.yaml
new file mode 100644
index 00000000..6cf51610
--- /dev/null
+++ b/_targets/sparcv8leon3/generic/nvm.yaml
@@ -0,0 +1,10 @@
+flash0:
+  size: 0x800000 # 8 MB
+  block_size: 0x100 # program page size
+  padding_byte: 0xff
+  partitions:
+    - name: plo
+      offs: 0x0
+    - name: kernel
+      offs: 0xf000
+      # if size not set - last non-virtual partition will be extnded to the end of flash
diff --git a/_targets/sparcv8leon3/generic/preinit.plo.yaml b/_targets/sparcv8leon3/generic/preinit.plo.yaml
new file mode 100644
index 00000000..21b1a9b3
--- /dev/null
+++ b/_targets/sparcv8leon3/generic/preinit.plo.yaml
@@ -0,0 +1,16 @@
+size: 0x1000
+is_relative: False
+
+contents:
+  - map sram 0x40000000 0x47ffffff rwx
+  - console 0.0
+  - phfs ram0 4.0 raw
+
+  - if: '{{ not(env.RAM_SCRIPT) | default(false) }}'
+    action: call
+    set_base: True
+    device: '{{ env.BOOT_DEVICE }}'
+    filename: user.plo
+    offset: '{{ nvm.flash0.kernel.offs }}'
+    target_magic: '{{ env.MAGIC_USER_SCRIPT }}'
+
diff --git a/_targets/sparcv8leon3/generic/user.plo.yaml b/_targets/sparcv8leon3/generic/user.plo.yaml
new file mode 100644
index 00000000..852a6fcd
--- /dev/null
+++ b/_targets/sparcv8leon3/generic/user.plo.yaml
@@ -0,0 +1,12 @@
+# kernel + initrd
+magic: '{{ env.MAGIC_USER_SCRIPT }}'
+size: 0x1000
+is_relative: True
+
+contents:
+  - kernel {{ env.BOOT_DEVICE }}
+  - app {{ env.BOOT_DEVICE }} -x dummyfs sram sram
+  - app {{ env.BOOT_DEVICE }} -x grlib-uart sram sram
+  - app {{ env.BOOT_DEVICE }} -x psh sram sram
+  - wait 500
+  - go!
diff --git a/_targets/sparcv8leon3/gr712rc/build.project b/_targets/sparcv8leon3/gr712rc/build.project
index 14bd76ee..11f582a9 100644
--- a/_targets/sparcv8leon3/gr712rc/build.project
+++ b/_targets/sparcv8leon3/gr712rc/build.project
@@ -30,34 +30,12 @@ export PORTS_CURL=n
 #
 # Platform dependent parameters
 #
-SIZE_PAGE=$((0x1000))
-PAGE_MASK=$((~(SIZE_PAGE - 1)))
-KERNEL_OFFS=$((0x10000))
-
-BOOT_DEVICE="flash0"              # Default boot device
-NAME_USER_SCRIPT="user.plo"       # User script name
-OFFS_USER_SCRIPT=$((0xf000))
-MAGIC_USER_SCRIPT=$((0xdabaabad)) # User script magic value
-ERASE_SIZE=$((0x20000))           # Rootfs disk erase block size (in bytes)
-FS_OFFS=$((0xc0000))
-
-
-PREINIT_SCRIPT=(
-	"map sram 0x40000000 0x80000000 rwx"
-	"console 0.0"
-	"phfs uart1 0.1 phoenixd"
-	"phfs flash0 2.0 raw"
-)
+export SIZE_PAGE=$((0x1000))
 
-USER_SCRIPT=(
-	"kernel ${BOOT_DEVICE}"
-	"app ${BOOT_DEVICE} -x dummyfs;-N;devfs;-D sram sram"
-	"app ${BOOT_DEVICE} -x grlib-multi sram sram"
-	"app ${BOOT_DEVICE} -x gr712rc-flash;-r;root:jffs2 sram sram"
-	"app ${BOOT_DEVICE} -x psh;-i;/etc/rc.psh sram sram"
-	"wait 500"
-	"go!"
-)
+export BOOT_DEVICE="flash0"              # Default boot device
+export MAGIC_USER_SCRIPT="dabaabad" # User script magic value
+#TODO: move to nvm.yaml
+ERASE_SIZE=$((0x20000))           # Rootfs disk erase block size (in bytes)
 
 
 b_build_project() {
@@ -70,25 +48,18 @@ b_build_target() {
 	b_log "Building $TARGET project"
 	b_log "Building phoenix-rtos-loader"
 
-	b_mkscript_preinit
-
+	image_builder.py script --nvm "$NVM_CONFIG" --script "$PLO_SCRIPT_PREINIT" --out script.plo
 	make -C plo all
 
-	cp "${PREFIX_PROG_STRIPPED}plo-${TARGET_FAMILY}-${TARGET_SUBFAMILY}.img" "$PREFIX_BOOT/plo.img"
-	cp "${PREFIX_PROG_STRIPPED}plo-ram-${TARGET_FAMILY}-${TARGET_SUBFAMILY}.img" "$PREFIX_BOOT/plo-ram.img"
+	cp -a "${PREFIX_PROG_STRIPPED}plo-${TARGET_FAMILY}-${TARGET_SUBFAMILY}.img" "$PREFIX_BOOT/plo.img"
+	cp -a "${PREFIX_PROG_STRIPPED}plo-ram-${TARGET_FAMILY}-${TARGET_SUBFAMILY}.img" "$PREFIX_BOOT/plo-ram.img"
 }
 
 
 b_image_target() {
-	b_mkscript_user "${USER_SCRIPT[@]}"
-	cp "$PLO_SCRIPT_DIR/$NAME_USER_SCRIPT" "${PREFIX_BOOT}"
-
-	b_prod_image
+	image_builder.py -v partition --nvm "$NVM_CONFIG" --name kernel --script "$PLO_SCRIPT_USER"
 
 	b_log "Creating rootfs"
-	# FIXME: does work only on macOS, for now hackish solution based on extending PATH
-	mtd-utils/build.sh
-	PATH="$(pwd)/_build/host-generic-pc/prog/:$PATH"
 
 	ROOTFS="$PREFIX_BOOT/rootfs.jffs2"
 
@@ -100,29 +71,18 @@ b_image_target() {
 		mv "$ROOTFS.tmp" "$ROOTFS"
 	fi
 
-	sz=$(du -b "$ROOTFS" | awk '{ print $1 }')
-	echo "rootfs size: $((sz/1024))KB"
-
-	local start=$(((FS_OFFS+sz+ERASE_SIZE-1)/ERASE_SIZE)) # Start clean block after rootfs
-	local end=$((FLASH_SZ/ERASE_SIZE))                    # Number of blocks in flash
-	local nblocks=$((end-start-1))                        # Clean blocks
-
-	# cmd for creating cleanmarkers in plo on clean system
-	echo "Create cleanmarkers in plo:"
-	echo "jffs2 -d 2.0 -c ${start}:${nblocks}:${ERASE_SIZE}:16"
+	local FS_OFFS=$(image_builder.py query --nvm "$NVM_CONFIG" '{{ nvm.flash0.rootfs.offs }}')
+	local FS_SZ=$(image_builder.py query --nvm "$NVM_CONFIG" '{{ nvm.flash0.rootfs.size }}')
+	sz=$(du -k "$ROOTFS" | awk '{ print $1 }')
+	echo "rootfs size: ${sz} kB / $((FS_SZ / 1024)) kB"
+	[ "$sz" -gt "$FS_SZ" ] && b_die "rootfs size exceeds the target partition!"
 
-	# set rootfs offset in image
-	OFFSET=$FS_OFFS
-	b_add2img "$ROOTFS" "$PHOENIX_DISK"
-
-	if [[ -f "$PREFIX_BOOT"/ptable.img ]]; then
-		rm "$PREFIX_BOOT"/ptable.img
-	fi
+	# cmd for creating cleanmarkers in plo
+	echo "Format jffs2 partition in plo:"
+	echo "jffs2 -d 2.0 -c $((FS_OFFS / ERASE_SIZE)):$((FS_SZ / ERASE_SIZE)):${ERASE_SIZE}:16"
 
-	"$PREFIX_BOOT"/psdisk "$PREFIX_BOOT"/ptable.img -m "$FLASH_SZ",0x20000 \
-		-p boot0,0,$((FS_OFFS)),0x51 \
-		-p root,$((FS_OFFS)),$((FLASH_SZ-FS_OFFS-ERASE_SIZE)),0x72 \
-		-p ptable,$((FLASH_SZ-ERASE_SIZE)),$((ERASE_SIZE)),0x51
+	image_builder.py ptable --nvm "$NVM_CONFIG"
+	image_builder.py -v disk --nvm "$NVM_CONFIG" --part "rootfs=$ROOTFS" --part "plo=${PREFIX_PROG_STRIPPED}plo-${TARGET_FAMILY}-${TARGET_SUBFAMILY}.img"
 }
 
 
diff --git a/_targets/sparcv8leon3/gr712rc/nvm.yaml b/_targets/sparcv8leon3/gr712rc/nvm.yaml
new file mode 100644
index 00000000..8d58ff4c
--- /dev/null
+++ b/_targets/sparcv8leon3/gr712rc/nvm.yaml
@@ -0,0 +1,15 @@
+flash0:
+  size: 0x1000000 # 16 MB
+  block_size: 0x1000
+  # eraseblock_size: 0x20000 # TODO: add generic support?
+  padding_byte: 0xff
+  partitions:
+    - name: plo
+      offs: 0x0
+    - name: kernel
+      offs: 0x20000
+    - name: rootfs
+      offs: 0x100000
+    - name: ptable
+      offs: 0xfe0000
+      size: 0x20000
diff --git a/_targets/sparcv8leon3/gr712rc/preinit.plo.yaml b/_targets/sparcv8leon3/gr712rc/preinit.plo.yaml
new file mode 100644
index 00000000..941abd6f
--- /dev/null
+++ b/_targets/sparcv8leon3/gr712rc/preinit.plo.yaml
@@ -0,0 +1,18 @@
+size: 0x1000
+is_relative: False
+
+contents:
+   #FIXME: map should end at 0x7fffffff
+  - map sram 0x40000000 0x80000000 rwx
+  - console 0.0
+  - phfs uart1 0.1 phoenixd
+  - phfs flash0 2.0 raw
+
+  - if: '{{ not(env.RAM_SCRIPT) | default(false) }}'
+    action: call
+    set_base: True
+    device: '{{ env.BOOT_DEVICE }}'
+    filename: user.plo
+    offset: '{{ nvm.flash0.kernel.offs }}'
+    target_magic: '{{ env.MAGIC_USER_SCRIPT }}'
+
diff --git a/_targets/sparcv8leon3/gr712rc/user.plo.yaml b/_targets/sparcv8leon3/gr712rc/user.plo.yaml
new file mode 100644
index 00000000..96504bc4
--- /dev/null
+++ b/_targets/sparcv8leon3/gr712rc/user.plo.yaml
@@ -0,0 +1,13 @@
+# kernel + initrd
+magic: '{{ env.MAGIC_USER_SCRIPT }}'
+size: 0x1000
+is_relative: True
+
+contents:
+  - kernel {{ env.BOOT_DEVICE }}
+  - app {{ env.BOOT_DEVICE }} -x dummyfs;-N;devfs;-D sram sram
+  - app {{ env.BOOT_DEVICE }} -x grlib-multi sram sram
+  - app {{ env.BOOT_DEVICE }} -x gr712rc-flash;-r;root:jffs2 sram sram
+  - app {{ env.BOOT_DEVICE }} -x psh;-i;/etc/rc.psh sram sram
+  - wait 500
+  - go!
diff --git a/_targets/sparcv8leon3/gr716/build.project b/_targets/sparcv8leon3/gr716/build.project
index a2b32b8c..f0cea5bb 100644
--- a/_targets/sparcv8leon3/gr716/build.project
+++ b/_targets/sparcv8leon3/gr716/build.project
@@ -30,40 +30,21 @@ export PORTS_CURL=n
 #
 # Platform dependent parameters
 #
-SIZE_PAGE=$((0x200))
-PAGE_MASK=$((~(SIZE_PAGE - 1)))
+export SIZE_PAGE=$((0x200))
 
-BOOT_DEVICE="flash0"              # Default boot device
-NAME_USER_SCRIPT="user.plo"       # User script name
-OFFS_USER_SCRIPT=$((0xE400))
-MAGIC_USER_SCRIPT=$((0xdabaabad)) # User script magic value
-KERNEL_OFFS=$((0xF400))
+#
+# Project specific build
+#
+export BOOT_DEVICE="flash0"         # Default boot device
+export MAGIC_USER_SCRIPT="dabaabad" # User script magic value
 
 
 # Physical kernel address
 KERNEL_PHBASE=$((0x31000000)) # iram start address
 KERNEL_PHOFFS=$((0x0))
-export KERNEL_PHADDR=$(printf "%08x" $((KERNEL_PHBASE + KERNEL_PHOFFS)))
-
-
-PREINIT_SCRIPT=(
-	"map dram 0x30000000 0x3000FFFF rw"
-	"map iram 0x31000000 0x3101FFFF rx"
-	"map extram 0x40000000 0x401FFFFF rwx"
-	"phfs uart3 0.3 phoenixd"
-	"phfs flash0 2.0 raw"
-	"console 0.2"
-)
-
-USER_SCRIPT=(
-	"kernel ${BOOT_DEVICE}"
-	"app ${BOOT_DEVICE} -x dummyfs extram extram"
-	"app ${BOOT_DEVICE} -x grlib-multi extram extram"
-	"app ${BOOT_DEVICE} -x psh extram extram"
-	"app ${BOOT_DEVICE} -x gr716-flash extram extram"
-	"wait 2000"
-	"go!"
-)
+KERNEL_PHADDR=$(printf "%08x" $((KERNEL_PHBASE + KERNEL_PHOFFS)))
+export KERNEL_PHADDR
+
 
 b_build_project() {
 	b_log "Building user applications"
@@ -75,22 +56,18 @@ b_build_target() {
 	b_log "Building $TARGET project"
 	b_log "Building phoenix-rtos-loader"
 
-	b_mkscript_preinit
+	image_builder.py script --nvm "$NVM_CONFIG" --script "$PLO_SCRIPT_PREINIT" --out script.plo
+	RAM_SCRIPT=1 image_builder.py script --nvm "$NVM_CONFIG" --script "$PLO_SCRIPT_PREINIT" --out script-ram.plo
 
 	make -C plo all
 
-	declare -F b_convert_project >/dev/null && b_convert_project
-
-	cp "${PREFIX_PROG_STRIPPED}plo-ram-${TARGET_FAMILY}-${TARGET_SUBFAMILY}.img" "$PREFIX_BOOT/plo-ram.img"
+	cp -a "${PREFIX_PROG_STRIPPED}plo-ram-${TARGET_FAMILY}-${TARGET_SUBFAMILY}.img" "$PREFIX_BOOT/plo-ram.img"
 }
 
 
 
 b_image_target() {
-	b_mkscript_user "${USER_SCRIPT[@]}"
-	cp "$PLO_SCRIPT_DIR/$NAME_USER_SCRIPT" "${PREFIX_BOOT}"
-
-	b_prod_image
+	:;
 }
 
 
diff --git a/_targets/sparcv8leon3/gr716/nvm.yaml b/_targets/sparcv8leon3/gr716/nvm.yaml
new file mode 100644
index 00000000..e4e9ab48
--- /dev/null
+++ b/_targets/sparcv8leon3/gr716/nvm.yaml
@@ -0,0 +1,11 @@
+flash0:
+  size: 0x1000000 # 16 MB
+  block_size: 0x100 # program page size
+  padding_byte: 0xff
+  partitions:
+    - name: plo
+      offs: 0x0
+    - name: kernel
+      offs: 0xe400
+      # if size not set - last non-virtual partition will be extnded to the end of flash
+      # TODO: add explicit/virtual partition for BCH
diff --git a/_targets/sparcv8leon3/gr716/preinit.plo.yaml b/_targets/sparcv8leon3/gr716/preinit.plo.yaml
new file mode 100644
index 00000000..3eaa0872
--- /dev/null
+++ b/_targets/sparcv8leon3/gr716/preinit.plo.yaml
@@ -0,0 +1,19 @@
+size: 0x1000
+is_relative: False
+
+contents:
+  - map dram 0x30000000 0x3000FFFF rw
+  - map iram 0x31000000 0x3101FFFF rx
+  - map extram 0x40000000 0x401FFFFF rwx
+  - phfs uart3 0.3 phoenixd
+  - phfs flash0 2.0 raw
+  - console 0.2
+
+  - if: '{{ not(env.RAM_SCRIPT) | default(false) }}'
+    action: call
+    set_base: True
+    device: '{{ env.BOOT_DEVICE }}'
+    filename: user.plo
+    offset: '{{ nvm.flash0.kernel.offs }}'
+    target_magic: '{{ env.MAGIC_USER_SCRIPT }}'
+
diff --git a/_targets/sparcv8leon3/gr716/user.plo.yaml b/_targets/sparcv8leon3/gr716/user.plo.yaml
new file mode 100644
index 00000000..d41d4d07
--- /dev/null
+++ b/_targets/sparcv8leon3/gr716/user.plo.yaml
@@ -0,0 +1,13 @@
+# kernel + initrd
+magic: '{{ env.MAGIC_USER_SCRIPT }}'
+size: 0x1000
+is_relative: True
+
+contents:
+  - kernel {{ env.BOOT_DEVICE }}
+  - app {{ env.BOOT_DEVICE }} -x dummyfs extram extram
+  - app {{ env.BOOT_DEVICE }} -x grlib-multi extram extram
+  - app {{ env.BOOT_DEVICE }} -x psh extram extram
+  - app {{ env.BOOT_DEVICE }} -x gr716-flash extram extram
+  - wait 2000
+  - go!