I want to simulate OR1200 to better understand its functionality/code
and if possible make changes to my need. Has someone written a
simulation environment/ tests. Any pointers/document would be
appreciated.

Thanks,

Farhan

P.S: FRom What I understand ork1sim is a architectural simulator and I
want to simulate actual verilog code (may be just the processor or
possibly with a minimal sets of periperhals such as UART/DEbug
Interface)