[Nottingham] Writing into FLASH!

Camilo Mesias camilo at mesias.co.uk
Thu Sep 17 21:27:37 UTC 2009


> Aside:
> How would you get direct access to the flash chips to be able to take
> advantage of YAFFS or JFFS?
> http://www.yaffs.net/
> http://sourceware.org/jffs2/

You'd need a driver that exposed the flash as a mtd (memory type
device?). Most SSDs and USB flash are just ordinary block devices and
don't have the same interface that's needed for flash filesystems.

In embedded systems the flash devices would have some address decoding
and be mapped into memory space. A driver would be able to access
them. I'm not sure how it's done in a desktop PC but there must be
some way to access BIOS chips for reprogramming...

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