Further testing and basically two kind of err code for the 6 rom I tested, examp...

Further testing and basically two kind of err code for the 6 rom I tested, example here:

;(nes:setup-and-emulate "1943.nes") #| The value NIL is not of type 6502-CPU::INSTRUCTION when binding 6502-CPU::INST |#

;(nes:setup-and-emulate "DKJU.nes") #| invalid number of arguments: 6 |#

I test both Rom using fcuex64.exe and both worked. Hence, I guess it is not usable. Sadly as the source code is very readable, unlike well python one.