iPhone bootloader accessed via serial port

The #iphone hackers have posted another breakthrough; they’ve managed to get an iPhone to give up a serial port that lets you send commands that look a lot like the Open Firmware commands you can use with a Mac. Here’s a sampling:
command list:
help this list
script run script at specific address
go jump directly to address
bootx boot a kernel cache at specified address
diags boot into diagnostics (if present)
tsys boot into tsys (if present)
bdev block device commands
image flash image inspection
fs file system commands
fsboot try to boot kernel at /kernelcache
devicetree create a device tree from the specified address
If you want to try this yourself, you’re going to need an iPod serial cable (you can make or buy these).

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