When a 37xx hits a restart 0 RST 0 (c7 00) what actually happens since (according to doc I am reading) it is not supported and there is no vector for it, or at least that’s the way I understand it. Will it go to a generic vector like a trap as opposed to a z180?
Can someone possibly shed some light on this for me? Thanks! 
I cannot find rst 0 in the processor manual, what document are you reading?
ftp://ftp1.digi.com/support/documentation/html/manuals/Rabbit2000/UsersManual/19instdf.htm#934577
It’s a 2000 manual, but applies to 3xxx too. RST 0 is dropped, so my inquiry is what happens when the processor hits c7 00? What does it actually do? Does it treat it as a NOP? Does it do something else? The doc is not clear.
Thanks.
In case anyone is interested, I found the answer. RST 0 (c7) is replaced with LJP (long jump) to a 16 bit address with an offset.