Dissable Internal Memory Unit Jasper 512MB

[Xumpy]

Ok so here is the problem. I'm currently jtagging a jasper 512 xbox.

I've had a lot of problems with XBR and FreeBoot, later found they where all related to writing onto the Internal MU.

This box is not mine so I prefer not to leave the Internal MU unformated. This will leave the trigger to corrupt the nand intact.

So is there a way to let freeboot think that there is no internal memory unit. I don't think the solution is in corrupting the mu. Cause it will just ask you to reformat it again.

Maybe there exist a patch for freeboot? Anyone having the same experience and a solution?

Thnx in advantage

Greetz

[jelle2503]

no-one has made a solution, everyone is aware of the problem (maybe read on this forum?)

go make a hv patch

[BoXXDr]

Is it possible to desolder the large nand and replace it with a small one?

[neonpolaris]

Yes, you can disable the onboard memory unit, there are threads about this already.  More or less you just blank out the NAND after a certain address.  The Cygnos Toolbox even has a function specifically for this.  You can do it with whatever flashing solution you use, though.

[janvkem]

Yes, you can disable the onboard memory unit, there are threads about this already.  More or less you just blank out the NAND after a certain address.  The Cygnos Toolbox even has a function specifically for this.  You can do it with whatever flashing solution you use, though.

I don't think you have read the first post:

This box is not mine so I prefer not to leave the Internal MU unformated. This will leave the trigger to corrupt the nand intact.

Replacing the larger nand by a 16mb nand is possible. To do this you have to change the resistors and the nand (use a nand chip from an old rrod xbox or a xd card). If you search you will find some topics about people that did this already. This is a lot of work however. I would just say to the guy to never ever format the memory and leave a lpt cable inside the box for easy reflashing.