diff --git a/mflash/flashloader/ramcode/mx1550.elf b/mflash/flashloader/ramcode/mx1550.elf
new file mode 100644
index 0000000..d334599
Binary files /dev/null and b/mflash/flashloader/ramcode/mx1550.elf differ
diff --git a/mflash/flashloader/scripts/cmd.tcl b/mflash/flashloader/scripts/cmd.tcl
index 7e728e3..a8c110e 100644
--- a/mflash/flashloader/scripts/cmd.tcl
+++ b/mflash/flashloader/scripts/cmd.tcl
@@ -20,27 +20,37 @@ proc mflash_erase { addr size } {
 }
 
 proc mflash_write { file addr } {
+	set ffstr [string repeat \xff 4096]
+	set f [open $file r]
 
     set percent 0
     set size [file size $file]
     set remain $size
     while {$remain > 0} {
         set n $($remain > $::mflash_buf_size ? $::mflash_buf_size : $remain)
-        mww $::MFLASH_CMD_LOC $::CMD_WRITE
-        mww $::MFLASH_ARG0_LOC $addr
-        mww $::MFLASH_ARG1_LOC $n
-        load_image_bin $file $($size - $remain) $::MFLASH_BUF_LOC $n
-        set remain $($remain - $n)
-        set addr $($addr + $n)
 
-        mflash_cmd_run 1000
+        set data [read $f $n]
+        set need_download [string equal -length $n $data $ffstr]
         
+        if {$need_download == 0 } {
+	        mww $::MFLASH_CMD_LOC $::CMD_WRITE
+	        mww $::MFLASH_ARG0_LOC $addr
+	        mww $::MFLASH_ARG1_LOC $n
+	        load_image_bin $file $($size - $remain) $::MFLASH_BUF_LOC $n
+	        
+	        mflash_cmd_run 1000
+		}
+		
+        set remain $($remain - $n)
+        set addr $($addr + $n)
         set percent_now $(($size - $remain) * 100 / $size)
         if { $percent_now > $percent } {
             set percent $percent_now
             puts "$percent%"
         }
     }
+
+    close $f
 }
 
 proc mflash_read { file addr size } {
@@ -86,4 +96,4 @@ proc mflash_unlock { } {
     mww $::MFLASH_CMD_LOC $::CMD_UNLOCK
 
     mflash_cmd_run 1000
-}
\ No newline at end of file
+}
diff --git a/mflash/targets/mx1550.cfg b/mflash/targets/mx1550.cfg
new file mode 100644
index 0000000..ddf76ec
--- /dev/null
+++ b/mflash/targets/mx1550.cfg
@@ -0,0 +1,86 @@
+#
+# OpenOCD setup script for mx1550
+#
+
+if { ![info exists CHIPNAME] } {
+   set CHIPNAME mx1550
+}
+
+if { ![info exists CPUTAPID] } {
+   set CPUTAPID 0x2ba01477
+}
+
+set T2_CHIP_VER {Unknown}
+
+proc mmio_rd {size addr} {
+    set val(0) 0
+    mem2array val $size $addr 1
+    return $val(0)
+}
+
+proc mmio_wr {size addr val} {
+    set x(0) $val
+    array2mem x $size $addr 1
+}
+
+proc t2_detect_version {} {
+    global T2_CHIP_VER
+    set chipid [mmio_rd 32 0xfc016c]
+    set maskid [mmio_rd  8 0xfc0170]
+
+    if {$chipid == [expr 0x790daf]} {
+       set T2_CHIP_VER {F1}
+    } else {
+        set chipid [mmio_rd 32 0xfc0170]
+        set maskid [mmio_rd  8 0xfc0174]
+       
+        if {$chipid == [expr 0x00790da0]} {
+            set T2_CHIP_VER {G0}
+        } elseif {$chipid == [expr 0x00790da1]} {
+            set T2_CHIP_VER {H0}
+        } else {
+            set T2_CHIP_VER [format "UNKNOWN:%08x:%02x" $chipid $maskid]
+        }
+    }
+}
+
+proc t2_reset_pre {} {
+    # RESET_DEVICE: Sysrstreq = CPU RESET
+    mmio_wr 32 0xfc0104 8
+    # CLKSEL=0
+    mmio_wr 8 0xfc0106 0
+}
+
+proc t2_reset_end {} {
+    # Clear RESET_REASON (to give the apperance of a power-on reset)
+    mmio_wr 8 0xfc0100 0
+}
+
+adapter_khz 10000
+set _TARGETNAME $CHIPNAME.cpu
+
+swd newdap $CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $CPUTAPID
+target create $_TARGETNAME cortex_m -endian little -chain-position $_TARGETNAME
+#transport select jtag
+#jtag newtap $CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $CPUTAPID
+
+#if { [llength [info commands dap]] == 0 } {
+    # OpenOCD version 0.10 and older that doesn't have a 'dap' command
+#    target create $CHIPNAME.cpu cortex_m -endian little -chain-position $CHIPNAME.cpu
+#} else {
+    # Newer versions of OpenOCD needs the DAP created explicitly
+#    dap create $CHIPNAME.dap -chain-position $CHIPNAME.cpu
+#    target create $CHIPNAME.cpu cortex_m -endian little -dap $CHIPNAME.dap
+#}
+
+$CHIPNAME.cpu configure -event examine-end { t2_detect_version }
+$CHIPNAME.cpu configure -event reset-assert-pre { t2_reset_pre }
+$CHIPNAME.cpu configure -event reset-end { t2_reset_end }
+
+cortex_m reset_config sysresetreq
+
+proc flash_alg_pre_init { } {
+  reset halt
+}
+
+set FLASH_ALG_CONFIG_START 0x000000000004ad28
\ No newline at end of file