Reading Xenon NAND, bad dumps + block errors whats goin on?

[snabbatobbe]

Managed to get a RROD 360, its a bit spatial (RROD sometimes, but fine others with an E74) and found its running one hell of an old dash 2895 or something like that, anyway it was the 3rd update from memory and more importantly, its JTAG'able

So I have soldered everything up according to THIS:http://www.se7ensins.com/forums/topic/148724-tutnoob-proof-installing-jtag-on-xexon/

So i'm using 330 resistors and no diodes at all (and i'm not sure if no diodes could be the issue or not)

Anyway, pin6 on the 360 came off at some point whilst getting the LPT port to the PC, whilst holding it down i got Nandpro to recognize the flash controller but not actually read anything (read error block 1 -2 -3 -4 etc) so I re soldered everything, this time nothing worked. I re solder again, this time it finds my NAND and dumps.

2x dumps later and hex comparison shows they are mismatched, 3rd dump mis matches, 4th 5th etc all mis match. Then I put them through degrader, all have plenty of bad blocks EXCEPT dump 3 which has only one bad block.

I found out about a program called XNand Healer so I tried a dump with that (mismatch with all dumps + errors so nothing changed) I tried its fix option as well, when I try to fix a .bin by reading from device it just goes read error retrying.... untill it gives up retrying, moves to the next one and gives up etc. If I try to repair from a dump it still does the read error thing and makes 100's of .bins on my desktop.

Does anyone know whats going on with these bad dumps? is it a bad soldering connection? not using the diode?

And whats up with XNand?

Cheers! Help much appreciated

 

[mosely]

Well first off, go do the diode method since its electronically safer and more modern. After you do that make sure you are making good contact with your LPT points on the motherboard. Make sure that your wire is not crazy long that connects to your computer's LPT Port. Also, lastly make sure you made your LPT cable correctly. Take some pictures so we can see how you made it and perhaps we can diagnose further.

 

[snabbatobbe]

Cheers Smkface, haha my LPT is freaking huge (2.5 ft? about a meter anyway haha)

Just because of all the electrical crud in my room + the radio gear I have shielded the cable with some good ole tinfoil and set the parallel port to EEP mode since I forgot that the CMOS resets on my PC since the battery has gone. So far have one good dump according to XNand, Degrader also reports OK (no bad blocks) i'll compare and if anything goes awry then I'll come back with pics and a shorter cable etc.

Its funny, no matter how many hours I search for solutions it isn't until I ASK that I find the soultion solution myself , at least I HOPE this fixes

Cheers again tho

 

[mosely]

Im not sure that tinfoil is a good way to shield this cable. If that tinfoil is touching anything metal other than it, you can guarantee its shorting whatever it is. Just take some electrical tape or any other tape and cover it like that.

 

[chickenpie]

The LPT cable should be 10cm or shorter. You should also update it to the 7371 dashboard because the more recent freeboot releases require certain efuses to be popped. Going directly from the blades dash to the latest freeboot may give you some problems.