Further PERQ Emulator progress (and a download!)

[Jim Battle]

...
>>   It's beyond my expertise, but my assumption about emulators was 
>> always that the guts don't really change across (modern) platforms - 
>> it's mainly the graphics layer that will be tightly coupled to the OS.
> 
>   The PCB layout software that I use (called, oddly enough, "PCB") runs 
> on UNIX platforms with X11.  Some time ago, DJ Delorie (of DJGPP fame, 
> also has a project featured on the front cover of this month's Circuit 
> Cellar Ink) did a huge amount of work to decouple the innards of PCB 
> from the GUI.  He calls the result "HID" (Human Interface Device) and it 
> has been used to create instances of PCB with a Motif GUI, a GTK+ GUI, 
> and someone (Der Mouse, is he here?) is even working on a raw X11 GUI.
> 
>   That sort of abstraction is nontrivial to achieve, but it is possible.

Have a look at Qt.  Have a look at wxWidgets (which is what I use). 
There is no need to write separate interfaces; in my experience, 98% of 
the code is the same across windows and osx (I haven't attempted to get 
a linux port running)

I do agree that reengineering the model/view abstraction after the fact 
is a lot of work, but that error is easily avoided.