How to design a microcontroller using VHDL?

hi again..

my professor told me that I need to know and understand the dataflow in intel 8085 micoprocessor before further testing it.
can anybody help explain to me the dataflow of this particular microprocessor. a recommendation for a book would also be great!
thanx in advance.

data flow is actually a way of describing a vhdl model i mean its a way of describing how output comes when there is a change in input of when inputs are applied.

I don't know specifically for how it works in microprocessor as there are many things.. i am little weak in VHDL though
if you want to read about dataflow description of VHDL model then this small tutorial might help you
http://www.gmvhdl.com/dataflow.htm