FW2.80 DownDate to FW2.71 for TA-079~086 PSP v0.01 By 0okm
http://0okm.blogspot.com/2007/01/fw280-downdate-to-fw271-for-ta-079086.html

Thanks to Team C+D, moonlight, hitchhikr, Noobz, PSPDev
And all support me people :)


CAUTION :
档ʵáΣաޱ֤Ը
κҲᷢñʹá
ȫ  http://www.playstation.jp/psp/

档gYáΣꓡo^Լ؟Ρ
ʤˤ𤭤Ƥ֪ޤ󡣱ܤͨΤ
ǳ  http://www.playstation.jp/psp/

To sacrifice yourself. Experimental. Extremely dangerous.
No warranty. Use on your own risk and responsibility.
Anything may happen. We recommend you to avoid seeing/downloading/using this.
Emergency exit -> http://www.playstation.jp/psp/
* this CAUTION copy from SEC(nem) :p


If you don't know HowTo use, DON'T use it !!!
It may brick your psp, Use it at your own Risk !!!
For more information goto http://0okm.blogspot.com/


This Program Just For FW2.80 TA-079~086 PSP
Don't use it on other ver. PSP !!!

HowTo
1. on FW1.50PSP
Download PSARDumper PSAR-Dumpa---ASB--.rar
http://www.psp-hacks.com/file/977

Download PSP FW2.71 Updates EBOOT.BPB 2_71_US_firmware_update.rar
http://www.psp-hacks.com/file/525

Download PBP Unpacker pbp-unpacker-094-setup.exe
http://www.psp-hacks.com/file/97

use PBP Unpacker to unpacker FW2.71 EBOOT.BPB
copy FW2.71 DATA.PSAR to ms0:\
run PSARDumper on FW1.50PSP
then "Press circle to dump encrypted without sigcheck and decrypted reboot.bin."
to Dump "FW2.71 File"

2. on FW2.80PSP
Extract FW280DownDate2FW271.zip to ms0:\
check ms0:\F0 have 286 files and total size is 18,598,267 Bytes
PowerOff PSP to CleanReboot
Run xLoader on FW2.80PSP
then Run 2.71DDforTA-079~086FW2.80PSP
