Downloading nk.bin without PB?

One alternative is to use a TFTP client to download the image. PB
download use a slightly modified TFTP protocol (it uses port 980 rather
than port 69), so you can use a TFTP client set to port 980 on the host
pc for the download. If you want the image to launch after download you
need to modify the bootloader to immediately jump to the image rather
than wait for a PB "jump" control command.

Anyone you like that can be set to port 980 (like for example tftpd32).
One more thing, though, you need to rename "nk.bin" to "boot.bin"
because that's the filename the bootloader tftp server expects to be
"put". Note that the bootloader implements a tftp *server*, so you
should use a tftp client on the host.

by Henrik Viklund
http://www.addlogic.se

You can try to get eshell.exe which was provided with PB3.0, or pumpkin
which is available on the web


is it necessary that you are able to download it from the pc?
one possibility is to load the new nk.bin file from an external sotrage
device.
in this case your bootloader has to support:

- handling fo external storage device (flash card, usb stick)
- simple fat system to read the nk.bin file
- small algorythm to detect an nk.bin file and store it in your flash
or ram

jack([email protected])