The simulator is something like pds-51. The assembler is built in,if I understand correctly what an assembler is.

I'm not shure the multiplication routines at this site are in are nin proper form.
I was much more successful getting the LCD routines into the simulator.

Yes, the files were from this site. I usually try standard intel HEX or something like that. I beleive that is what I save the programs that I have written and simulated in.

Know about any routines to generate random numbers?