Hello @Wijnand ,
Thanks for your post. The AN1230 is too old, I could not find related BDM Driver Package.
While I find below link for your reference, which provide BDM driver and related info.
It is not NXP(Motorola) official released, which is a private blog.
BDM Interface for Motorola 683xx MCU\\ Usage with GDB Debugger
Wish it helps.
BR
Celeste
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