Boot from NAND flash ???
manningc2 at actrix.gen.nz
Wed May 15 05:14:53 EDT 2002
On Tue, 14 May 2002 00:05, David Woodhouse wrote:
> manningc2 at actrix.gen.nz said:
> > There are however two mechanisms to get around this: * Some people
> > and micros implement a "data pump" state machine to extract an
> > executable sequence from a NAND device.
> The DiskOnChip Millennium does this. Which is how it's used for LinuxBIOS
> -- the device has 512 bytes of SRAM which is initialised from the flash at
> reset time, and that's just about enough to initialise the system and pull
> the rest of the startup code off the flash.
> Note that the DiskOnChip 2000 has ROM instead of RAM, so you can't change
> the startup code from the PC BIOS extension header that it ships with,
> hence can't use it for such things.
Another difference is that the DOC's RAM and ROM are surely random access and
hence can hold branching code etc.
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