found the pink book for the 68HC16....

good news is that it acts like an updated/upgraded 68HC11..... the bad news is that it's basically the halfway point between a 68HC11 and the 68332 as used in a lot of GM OBD2 stuff.... it's basically a 68HC11 with integrated bank switching capabilities and makes for some rather confusing instructions...

but i did find the vector table, so i have some idea of how the code is going to execute.

the reset vector is actually kind of hard to calculate due to the bank switching... but it looks like it is 10000h.

i've gotten a little bit of it disassembled..... initial impressions are that it was definitely not created in a lower level language.