diff --git a/doc/README.PlanetCore b/doc/README.PlanetCore
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+After several heart-struck failure, I got one workable way to program
+each other in FLASH between PlanetCore and U-Boot.
+
+Hardware Platform : RPXlite DW(EP 823 H1 DW)
+
+1. From U-Boot to PlanetCore
+
+Utilities : PlanetCore Boot Loader - PCL200.mot
+
+[root@sam tftpboot]# ppc_8xx-objcopy -O ppcboot
+PCL200.mot pcl200.bin
+
+[Target Operation]
+u-boot>t 100000 pcl200.bin
+u-boot>go 0x100000
+## Starting application at 0x00100000 ...
+
+MPC8xx PlanetCore Flash Burner v2.00
+Copyright 2001 Embedded Planet.  All rights reserved.
+
+Construct Flash Device.....done.
+
+
+Program MPC8xx PlanetCore Boot Loader v2.00
+Built Sep 19, 2001 at 14:34:42
+Image located from FC000000 to FC01B5D1.
+(Skipping an image, only loading low boot image)
+
+Low boot board detected, skipping high boot image.
+Erasing, programming and verifying will start in 20
+seconds
+Press P to start immediately or ESC to cancel
+Press Space or Enter for more options.
+..............
+
+Erasing
+Programming
+FLASH programmed successfully!
+Press R to induce a hard reset
+
+MPC8xx PlanetCore Boot Loader v2.00
+Copyright 2001 Embedded Planet.  All rights reserved.
+DRAM available size = 64 MB
+wvCV
+DRAM OK
+>
+
+2. From PlanetCore to U-Boot
+
+Utilities : PlanetCore FLASH Burner - PCB200.mot
+
+Use Flash Burner to finish the work:
+
+First, TFTP the U-Boot image file to RAM; For example,
+RPXlite_DW.bin to 0x400000
+Second, TFTP FLASH Burner to RAM; For example,
+0x100000
+Third, run the FLASH Burner and Program the U-Boot
+image into the correct location in FLASH.
+
+[Target Operation]
+MPC8xx PlanetCore Boot Loader v2.00
+Copyright 2001 Embedded Planet.  All rights reserved.
+DRAM available size = 64 MB
+wvCV
+DRAM OK
+>t
+Load using tftp via Ethernet
+Enter server IP address <172.16.115.6> :
+Enter server filename   <PCL200.mot> : RPXlite_DW.bin
+Enter (B)inary or (S)record input mode <S> : B
+Enter address offset  : <00400000 hex> :
+
+Total bytes = 120096 in 232184 uSecs
+Loaded addresses 00400000 through 0041D51F.
+Start address = 00400000
+>t
+Load using tftp via Ethernet
+Enter server IP address <172.16.115.6> :
+Enter server filename   <RPXlite_DW.bin> : PCB200.mot
+Enter (B)inary or (S)record input mode <B> : S
+Enter address offset  : <00000000 hex> :
+.512.1024..2048....4096.....
+Total bytes = 326280 in 2570249 uSecs
+Loaded addresses 00100000 through 0011BB51.
+Start address = 00100000
+>go
+[Go 00100000]
+
+MPC8xx PlanetCore Flash Burner v2.00
+Copyright 2001 Embedded Planet.  All rights reserved.
+
+Construct Flash Device.....done.
+
+Bad start address
+Start = 0xFFFFFFFF, target = 0xFFFFFFFF, length =
+0xFFFFFFFF
+Forcing Menu Interface
+
+h[elp]     Show commands.
+c[ode]     Show information on code to be loaded.
+di[splay]  Display all flash sections.
+du[mp]     Dump memory. d ? for more info.
+e[rase]    Erase flash sections.
+f[ill]     Fill flash sections.
+im[age]    Toggle load high, low, or both flash
+images.
+in[fo]     Show flash information.
+ma[p]      Show memory map.
+mo[dify]   Modify memory.  m ? for more info.
+p[rogram]  Erase, program, and verify now.
+reset      Restart the loader.
+s[how]     Show flash sections to erase and program.
+t[est]     Test flash sections.
+q[uit]     Quit without programming.
+#program 400000 ff000000 1D51F
+doProgram( 400000 ff000000 1D51F )
+
+Start = 0x00400000, target = 0xFF000000, length =
+0x0001D51F
+Erasing sector 0xFF000000, length 0x008000.
+Erasing sector 0xFF008000, length 0x008000.
+Erasing sector 0xFF010000, length 0x008000.
+Erasing sector 0xFF018000, length 0x008000.
+Programming FF000000 through FF01D51E
+FLASH programmed successfully!
+Press R to induce a hard reset
+
+Forcing Hard Reset by MachineCheck and
+ResetOnCheckstop...
+
+U-Boot 1.1.2 (Aug 29 2004 - 15:11:27)
+
+CPU:   PPC823EZTnnB2 at 48 MHz: 16 kB I-Cache 8 kB
+D-Cache
+Board: RPXlite_DW
+DRAM:  64 MB
+FLASH: 16 MB
+*** Warning - bad CRC, using default environment
+
+In:    serial
+Out:   serial
+Err:   serial
+Net:   SCC ETHERNET
+u-boot>
+
+-------------------------------------------------
+
+Well, sometimes network function of PlanetCore couldn't work when
+switching from U-Boot to PlanetCore. For example, you couldn't
+download a file from HOST PC via TFTP. Don't worry, just restart your
+HOST PC and everything would work as smooth as clockwork. I don't
+know the reason WHY:-)
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Merry Christmas and Happy New Year!
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+=====
+Best regards,
+
+Sam