>> But there is information out on the web that looks like you can build a
>> complete BDM unit without getting anything from Freescale/Motorola.
>
>The big problem is you wouldn't get the BDM software, and there's no GDB
>support for some of the slightly less mainstream Coldfire chips (e.g. the
>SCF5250 "Amadeus Plus" Coldfire MP3 decoder).
>
>You can bootstrap them without BDM (using JTAG), but you'd have to write a
>(small!) bootloader that would fetch a program over the serial link and
load
>it into Flash ROM. That said, the 5250 has an onboard bootloader that can
read
>from a HDD or flash drive on the ATA (or MMC/SD/MS) interface. Or (IIRC) it
>can be made to load from the serial port. I'd have to check the 5250
>programmer's manual to confirm that though...

Hmm, haven't gone digging into the inner workings, just done enough
searching to see what I could do with an existing chip. But I got the
impression that much of the BDM software that is internal to the chip comes
in ROM in the chip when you purchase it, and cannot be overwritten - just
functionally disabled. But then my only experience comes from investigating
the possibilities with an HCS12 chip, and not actually done anything serious
with it.

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist