Rockbox Development > New Ports
Creative Zen Vision:M
jhulst:
--- Quote from: saratoga on March 16, 2007, 01:58:52 AM ---By the way, if no one else figures out a way to get code running on the ZVM, I was going to suggest that someone get a broken player, desolder the flash ROM and then dump it with an EEPROM programmer. The chip is TSOP with just an 8 bit bus, so it wouldn't be that hard to do. Hypothetically, would you be willing to do this, or else mail the EEPROM chip to someone with the equipment?
--- End quote ---
Is there anybody who would be able to dump this for me? I will mail the flash ROM to you.
jwh
saratoga:
--- Quote from: jhulst on April 13, 2007, 12:58:43 PM ---
--- Quote from: saratoga on March 16, 2007, 01:58:52 AM ---By the way, if no one else figures out a way to get code running on the ZVM, I was going to suggest that someone get a broken player, desolder the flash ROM and then dump it with an EEPROM programmer. The chip is TSOP with just an 8 bit bus, so it wouldn't be that hard to do. Hypothetically, would you be willing to do this, or else mail the EEPROM chip to someone with the equipment?
--- End quote ---
Is there anybody who would be able to dump this for me? I will mail the flash ROM to you.
jwh
--- End quote ---
I can ask around, but it sounds to me like looking at the Windows update program would be the best idea now, since it can likely be used to update the firmware, something we'll need to be able to do regardless.
Bagder:
--- Quote from: jhulst on April 13, 2007, 12:57:45 PM ---
--- Quote from: Bagder on April 13, 2007, 03:17:36 AM ---We understand you fine - remember that we have reverse engineered a few other players before this... But I figure there are more than one way to run these hash algorithms on the data (like order of data, range of data, with or without padding etc) so I don't see how any random test-shots can exclude any particular algorithm until more details are discovered.
--- End quote ---
In the past, how did you figure out more details? Is it best just to keep trying codes and seeing if the match up? To me, that sounds like a lot of guessing.
--- End quote ---
The early targets had "simple" algorithms so they could be "cracked" differently.
For more recent targets (like the sansa), it has involved lots of dissassembly reading.
mcuelenaere:
I'll post this link here too (dunno if it's useful, most of it has already been said except maybe the last part): http://gim.6te.net/ZVM/zvm.html
(ignore the ads, it's a free hosting so.. ;) )
mcuelenaere:
--- Quote from: larryzotter on April 16, 2007, 08:43:17 AM ---So what does the coincidence mentioned suggest? I do not really get it. Sorry.
--- End quote ---
It means I'm pretty sure that the NULL block contains a 160bit hash of the whole CIFF block
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