🚀 go-pugleaf

I'm building a repeater controller with an Intel 8751 (actually it's an
8744, but I don't use the HDLC controller).
This is my first attempt with the 8744 and it's not working the first
time.
I use all the I/O pins, so I have no way to look at what's going on
inside.  It is very difficult to debug.  Yes, I'm adding the
equivalent of print statements in the code and toggling them out a
borrowed i/o pin, but it's less than satisfactory.  Turnaround time for
changes is awful.  I've pulled out all my remaining hair.

Is there any simulation/emulation software that will execute my code
and provide debugging support?  Something that runs on a unix machine
ansi BASIC, C, Fortran, Pascal would be best.  I could probably borrow
a PC if I had to.

Thanks miker