diff --git a/bsp/ls1cdev/ls1b_ram.lds b/bsp/ls1cdev/ls1b_ram.lds
new file mode 100644
index 0000000000000000000000000000000000000000..95fb2496f814210761e169d8e0c368bba04967b3
--- /dev/null
+++ b/bsp/ls1cdev/ls1b_ram.lds
@@ -0,0 +1,125 @@
+/*
+ * File      : ls1b_ram.lds
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2011, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-05-17     swkyer       first version
+ * 2010-09-04     bernard      move the beginning entry to 0x80200000
+ */
+
+OUTPUT_ARCH(mips)
+GROUP(-lgcc -lc)
+
+ENTRY(_start)
+SECTIONS
+{
+    . = 0x80200000 ;
+
+    .start :
+    {
+        *(.start);
+    }
+
+    . = ALIGN(4);
+    .text : 
+    {
+         *(.text)
+         *(.text.*)
+         *(.rodata)
+         *(.rodata.*)
+         *(.rodata1)
+         *(.rodata1.*)
+         
+         /* section information for finsh shell */
+         . = ALIGN(4);
+         __fsymtab_start = .;
+         KEEP(*(FSymTab))
+         __fsymtab_end = .;
+         . = ALIGN(4);
+         __vsymtab_start = .;
+         KEEP(*(VSymTab))
+         __vsymtab_end = .;
+         . = ALIGN(4);
+
+         . = ALIGN(4);
+         __rt_init_start = .;
+         KEEP(*(SORT(.rti_fn*)))
+          __rt_init_end = .;
+         . = ALIGN(4);
+    }
+
+    . = ALIGN(4);
+    .data : 
+    {
+         *(.data)
+         *(.data.*)
+        
+         *(.data1)
+         *(.data1.*)
+         
+         . = ALIGN(8);
+         _gp = ABSOLUTE(.);     /* Base of small data */
+         
+         *(.sdata)
+         *(.sdata.*)
+    }
+
+    .sbss : 
+    {
+        __bss_start = .;
+        *(.sbss)
+        *(.sbss.*)
+        *(.dynsbss)
+        *(.scommon)
+    }
+
+    .bss :
+    {
+        *(.bss)
+        *(.bss.*)
+        *(.dynbss)
+        *(COMMON)
+        __bss_end = .;
+    }
+    _end = .;
+
+    /* Stabs debugging sections.  */
+    .stab          0 : { *(.stab) }
+    .stabstr       0 : { *(.stabstr) }
+    .stab.excl     0 : { *(.stab.excl) }
+    .stab.exclstr  0 : { *(.stab.exclstr) }
+    .stab.index    0 : { *(.stab.index) }
+    .stab.indexstr 0 : { *(.stab.indexstr) }
+    .comment       0 : { *(.comment) }
+    /* DWARF debug sections.
+     * Symbols in the DWARF debugging sections are relative to the beginning
+     * of the section so we begin them at 0.  */
+    /* DWARF 1 */
+    .debug          0 : { *(.debug) }
+    .line           0 : { *(.line) }
+    /* GNU DWARF 1 extensions */
+    .debug_srcinfo  0 : { *(.debug_srcinfo) }
+    .debug_sfnames  0 : { *(.debug_sfnames) }
+    /* DWARF 1.1 and DWARF 2 */
+    .debug_aranges  0 : { *(.debug_aranges) }
+    .debug_pubnames 0 : { *(.debug_pubnames) }
+    /* DWARF 2 */
+    .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
+    .debug_abbrev   0 : { *(.debug_abbrev) }
+    .debug_line     0 : { *(.debug_line) }
+    .debug_frame    0 : { *(.debug_frame) }
+    .debug_str      0 : { *(.debug_str) }
+    .debug_loc      0 : { *(.debug_loc) }
+    .debug_macinfo  0 : { *(.debug_macinfo) }
+    /* SGI/MIPS DWARF 2 extensions */
+    .debug_weaknames 0 : { *(.debug_weaknames) }
+    .debug_funcnames 0 : { *(.debug_funcnames) }
+    .debug_typenames 0 : { *(.debug_typenames) }
+    .debug_varnames  0 : { *(.debug_varnames) }
+}