To quote, roughly translated: The first downgrade to 3.70 on PS3 Slim 3:55, DiGiTaLAnGeL tested by us!
For the first time, we have been involved in something truly spectacular We were the first in the world to test the downgrade from 3.70 to 3:55 on a PS3 Slim (With flash memory, "NOR") using the ProgSkeet and patched some files provided by dospiedra, a famous Spanish coder already riding high for having discovered the method of going back to 3.55/3.41 with the PS3 (FAT flash memory "NAND").
After several attempts, in collaboration with dospiedra, we got to go back from 3.70 to 3:55, enter the factory mode with a simple key to jailbreak, rifleshare a modified version of 3:55 to prevent the SYSCON (the registry in between downgrades) was consulted during the downgrade and now we are happily at 3:55 KMEAW!
With this version of moddata 3:55, you can perform a memory dump today and you can switch on the fly from 3:55 to 3.70 without having to do this all the time-consuming process: using progskeet fact you can go straight to 3.70 changed to 3:55!
Dospiedra said it will release details on the patches applied to the NOR and the update file as soon as possible.
New life for those who arrived too late to enjoy the benefits of the 3:55?
Stay tuned for more PS3 Hacks and PS3 CFW news, follow us on Twitter and be sure to drop by the PS3 Hacks and PS3 Custom Firmware Forums for the latest PlayStation 3 scene updates and homebrew releases!
It is my understanding that you CAN downgrade on newer firmwares, but it requires this flasher.
Someone reported before that a v3.70 or 3.71 was downgraded using a hardware flasher. That's why you see these new v3.55 firmwares with the syscon patched, so they will run even if the ps3 had a newer firmware installed before.
I haven't looked into it since I'm already on v3.55, but that is what I thought when I read some of the previous news articles few weeks ago?
Following up on the QT Flasher for PS3 Test and Localized Versions for the ProgSkeet device, today PlayStation 3 developers uf6667, ago and bmx have made available the Winskeet40000 Rev 111002 software platform for Windows following by official Linux / Windows versions from http://twitter.com/#!/uf6667/status/121297431014027267.
New Qt GUI implemented
Linux and MacOS X support
Added predefined and user presets
Fixed ability to select invalid ranges
Added a file patcher
Flasher: Added support for canceling running operations
Flasher: Added USB device reset
Flasher: Added support for erasing as a stand-alone operation
Flasher: Added cycle period selection, should help with longer cables
Flasher: Added abort on error option
Flasher: Reodered operations, full read, full erase, full write
Flasher: Fixed bug with unreliable GPIO operation
NOR: Added new write mode "Dual word program"
NOR: Added display of total flash size
NOR: Fixed flashing of the second half of Samsung K8Q2815UQB and likely other dual chip NORs
NOR: Added erase block region configuration
NOR: Added selection of number of bytes for buffered write
NOR: Added support for Spansion S29GL128N90TFIR2
NAND: Made custom ranges work
NAND: Added Dual-NAND reading. Reads a block from two NANDs simultaneously, thereby doubling the speed.
If you're using 16MByte SAMSUNG NOR, please use Sector Size: 4kB/ Sector Count: 4096 and check "alternate writing method".
Differential flash, if you haven't noticed yet, will skip unnecessary writes (compares data on chip vs data in file)
Finally, below is GlitchSkeet Rev 111216 via http://www.tortuga-cove.com/forums/viewtopic.php?f=61&t=779#p2309 for those who wish to RGH with ProgSkeet (for XBox 360 users primarily at this time).
To quote: GlitchSkeet: is another bitstream written specifically for the ProgSkeet flasher, which will allow it to operate as a Glitcher like the many Glitch-Chips out there now that are used to perform the Reset Glitch Hack on the XBox 360 console.
The GlitchSkeet Bitstream currently have support for only the "Trinity/Slim" XBox 360 board model, It may need some more tweaking as well as adding support for other XBox 360 board models in later releases as time allows.
But anyway, all Skeeters/ProgSkeet owners have the right to test this Bitstream as it is in its current state.
Compatibility: This Bitstream is compatible with ProgSkeet v1.1 Crystal Blue only, ProgSkeet v1.0 Crystal White won't work.
Preparation: Short R12 and R9, Open R11 and R10
GP5 = I2C_SCL
GP6 = I2C_SDA
Adr0 = CPU_RST (you must add a Capacitor of 220pf/230pf/270pf between Adr0 & Ground)
Adr2 = POST_OUT1
Adr4 = DEBUG PIN / LED
N.B: the Injectus Jtag USB programmer is needed in order to update ProgSkeet with this Bitstream.
Credits to uf6667, Ago, bmx, nice69 and to all ProgSkeet Team members and testers.