JTAG interface board

[Andy Green]

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Somebody in the thread at some point said:

| You can flash u-boot in NAND via dfu-util, but you can only alter
| u-boot in NOR with the debug board. So without the board you can still
| play around with bootloader, kernel and rootfs, and if you stuff up,
| then the u-boot in NOR will still be available to use to reflash and
| recover.

Yes you don't have to fear trashing U-Boot in NAND at all, and you can't
trash NOR U-Boot without a debug board.

The main downside is that if you were planning to work on bootloader or
kernel, you will miss out on being able to see the serial console traffic.

- -Andy
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